mlsn and growth potential presentation gis17
TRANSCRIPT
![Page 1: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/1.jpg)
MLSN Guidelinesand
Growth Potential
Jason Haines, Pender Harbour Golf Courseand
Larry Stowell, Ph.D., PACE Turf
![Page 2: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/2.jpg)
What you will learn• How soil and plant nutrient guidelines are developed• What turf nutrients are really needed• Developing a nutrient budget• MLSN & GP adoption at Pender Harbour• Estimating nutrient input from organic matter and
irrigation water• MLSN, GP and new nutrient restrictions
![Page 3: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/3.jpg)
Who am I?• Superintendent at
Pender Harbour Golf Club for past 10 years
• Blogger• Citizen scientist
![Page 4: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/4.jpg)
Who am I?• [email protected]• @PenderSuper• www.turfhacker.com• www.linkedin.com/in/jasonhaines1
![Page 5: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/5.jpg)
Who am I?• Husband and Dad• Rope Rescue Team
Leader for Sunshine Coast Search and Rescue
![Page 6: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/6.jpg)
Where am I?• Semi Private 9 hole
course.• 1 acre poa/bent
greens• 10 acres fairways • 0.75 acres tee
![Page 7: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/7.jpg)
Where am I?• One of the most northerly courses in N.
America that is open year-round
![Page 8: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/8.jpg)
Who am I?• Turfgrass researcher and consultant, 28 years• Ph.D. in Plant Pathology, 1982• Post Doc University of California, Davis• Certified Professional Agronomist - retired• Author of 4 book chapters, 2 patents, many
publications• Owner of PACE Turf, LLC with Dr. Wendy
Gelernter
![Page 9: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/9.jpg)
Who am I?• [email protected]• www.paceturf.org• @paceturf• www.youtube.com/user/paceturf• www.facebook.com/paceturf• www.facebook.com/mlsnturf• www.linkedin.com/in/larrystowell• www.researchgate.net/profile/Larry_Stowell
![Page 10: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/10.jpg)
Who am I?• Micah Woods, Ph.D.• [email protected] • blog.asianturfgrass.com• @asianturfgrass• www.facebook.com/mlsnturf• www.facebook.com/globalsoilsurvey• www.linkedin.com/in/micah-woods-57a94522• www.subscribepage/mlsn
![Page 11: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/11.jpg)
Keep it simple• MLSN (minimum levels for sustainable nutrition) are
baseline soil nutrient concentrations – don’t let soils drop below these level
• No nutrient response is expected when soil levels are maintained above the MLSN values
• GP (Growth Potential) is a method to estimate plant needs to help predict what fertilizers are required to maintain soil levels above MLSN guidelines
![Page 12: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/12.jpg)
MLSN ppmP 21K 37Ca 331Mg 47S 7
pH 5.5-8.5
Keep it simpleMehlich-3 extraction
![Page 13: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/13.jpg)
Mehlich 3 SLAN MLSN GSS GSS Median
P 50 21 23 71
K 110 37 32 61
Ca 750 331 254 623
Mg 140 47 39 84
S 15 - 40 7 8 15
Global Soil Survey
![Page 14: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/14.jpg)
Conventional soil test
Bill KreuserUniversity of NebraskaExtension PublicationG2265
![Page 15: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/15.jpg)
Turf Growth Potential• A simple growing degree day model based upon the
standard normal distribution• Used to predict cool- vs. warm-season turf performance
in different locations• Calculated by comparing the average temperature in a
location with the optimum growth temperatures for a given turf type
• Growth potential >50% results in vigorous growth
![Page 16: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/16.jpg)
Growth PotentialEstimate what the plant needs
Turfgrass Growth
0102030405060708090
100
10 30 50 70 90 110Temperature (F)
Gro
wth
Pot
entia
l
WarmCool
![Page 17: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/17.jpg)
• GP = Growth Potential • obsT = observed temperature (F) • optT = mean optimum growth temp. (68 for C3, 88 for C4)• sd = standard deviation (10 for C3, 12 for C4)• e = natural logarithm base (2.718282…)
GP 1001
e
1
2
obsT optT( )
sd
2
![Page 18: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/18.jpg)
Cool-season turfgrows best 60-75F (X=68)poor growth >80F & <50F
Warm-season turfgrows best 80-95F (X= 88)
poor growth <55 (dormancy)
Turfgrass Growth
0102030405060708090
100
10 30 50 70 90 110Temperature (F)
Gro
wth
Pot
entia
l
WarmCool
![Page 19: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/19.jpg)
Growth PotentialOrlando, FL
![Page 20: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/20.jpg)
Manila, PHI
0
20
40
60
80
100
1 2 3 4 5 6 7 8 9 10 11 12Month of the Year
Perc
ent G
row
th P
oten
tial
Clear dominance of warm-season turf
Warm
Cool
![Page 21: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/21.jpg)
Clear dominance of cool-season turf
Worcester, MA
0
20
40
60
80
100
1 2 3 4 5 6 7 8 9 10 11 12
Month of the Year
Perc
ent G
row
th P
oten
tial
Cool
Warm
![Page 22: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/22.jpg)
Cathedral City, CA - Warm Climate
0
20
40
60
80
100
1 2 3 4 5 6 7 8 9 10 11 12Month of the Year
Perc
ent G
row
th P
oten
tial
Transition environment
COOL
WARM
![Page 23: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/23.jpg)
Inland Valley: Riverside, CA
0
20
40
60
80
100
1 2 3 4 5 6 7 8 9 10 11 12Month of the Year
Perc
ent G
row
th P
oten
tial
COOL
WARM
Transition environment
![Page 24: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/24.jpg)
Why MLSN & GP?
![Page 25: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/25.jpg)
Why MLSN & GP?
Apply the right amount of fertilizer – just what the
grass requires
![Page 26: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/26.jpg)
Why MLSN & GP• Best grass possible – just what is needed• Save money• Avoid applying products that are not
needed• Reduce environmental impact• Increase sustainability
![Page 27: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/27.jpg)
Why MLSN & GP?• Since 2006, 618 US golf facilities
have closed (9%)• Nitrogen based fertilizer cost has
increased by >60%• Phosphorus and potash fertilizer
costs have increased by >100%
![Page 28: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/28.jpg)
![Page 29: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/29.jpg)
![Page 30: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/30.jpg)
![Page 31: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/31.jpg)
![Page 32: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/32.jpg)
![Page 33: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/33.jpg)
![Page 34: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/34.jpg)
Jason’s how and why MLSN?• Started to blog in 2011• Noticed audience was
mostly Superintendents• Quickly developed a
theme of pesticide reduction.
• Even won an award!
![Page 35: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/35.jpg)
Jason’s how and why MLSN?• Started using twitter• Learned about the
thing called minimalism where it’s cool to be poor
• 2008 Recession demanded cost reductions
![Page 36: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/36.jpg)
I’ve got excuses● Low budget● 9 holes● Low expectations● Dead grass isn’t
the end of the world
● Less pressure
![Page 37: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/37.jpg)
Jason’s how and why MLSN?• Was using BCSR• Fertilizer theory didn’t agree with what I was
seeing in real life• Applying more of certain nutrients had no
impact that I could see
![Page 38: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/38.jpg)
Ca
![Page 39: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/39.jpg)
Mg
![Page 40: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/40.jpg)
K
![Page 41: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/41.jpg)
pH 7 and higher
Ca 18 36 76%Mg 4 8 17%K 2 2 4%Na 1 1 2%H 0 0 0%
![Page 42: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/42.jpg)
pH 5
Ca 11 22 47%Mg 2 4 9%K 1 1 2%Na 0 0 0%H 20 20 42%
![Page 43: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/43.jpg)
Extreme nutrient deficiency● MLSN explained
what I was seeing with regard to nutrient inputs
● Local club with severe Ca deficiency (10ppm)
![Page 44: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/44.jpg)
Extreme nutrient deficiency● Applied Ca and the
greens got better
![Page 45: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/45.jpg)
MLSN seemed low risk● MLSN is simple● I dove in head first● If it didn’t work I would go back to old way
![Page 46: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/46.jpg)
Started with a soil test
![Page 47: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/47.jpg)
Year 1 results● Made switch to
ag-grade soluble fertilizer to gain more control
● Bit of a learning curve
![Page 48: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/48.jpg)
Year 1 results
![Page 49: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/49.jpg)
5 years later
![Page 50: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/50.jpg)
5 years later
![Page 51: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/51.jpg)
Soil test vs Fertilizer Applied
![Page 52: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/52.jpg)
Soil test vs Fertilizer Applied
![Page 53: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/53.jpg)
Soil test vs Fertilizer Applied
![Page 54: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/54.jpg)
Soil test vs Fertilizer Applied
![Page 55: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/55.jpg)
How does the MLSN Work● 2 Options
○ Apply fertilizer used by the plant regardless of soil tests
○ Test soil and apply only the fertilizer that is required
![Page 56: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/56.jpg)
Jason’s how and why GP?● Growth Potential
explained the way grass grew in my climate
![Page 57: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/57.jpg)
MLSN are not targets● We are usually concerned
with nutrient deficiencies● What are the impacts of
nutrient excesses?● Where do nutrients that
aren’t needed go?
![Page 58: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/58.jpg)
MLSN and GP for IPM● We can apply all nutrients at the ratio
determined by MLSNOR
● We can apply the amount of nutrients to reduce impacts of certain diseases and pests.
![Page 59: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/59.jpg)
MLSN and GP for IPM● Combine MLSN with GP and fine
tune application timing● GP High N in Summer for dollar spot
and anthracnose, little N in winter for Fusarium
● MLSN K in Summer for anthracnose, not in winter for fusarium
● Ca in Summer not in winter for acidifying fusarium?
![Page 60: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/60.jpg)
20 25 30 35 40 45 50 55 60 65 700
5
10
15
20
25
30
35
40
45
2012 data presented at the 2013 CSSA Meetings by Charles SchmidPotassium Source and Rate Effect on Anthracnose Severity of Annual
Bluegrass. Charles, J. Schmid, Bruce B. Clarke, James A. Murphy, Rutgers University.
Mat Potassium (ppm)
Perc
ent A
nthr
acno
se MLSN K guideline 37 ppm
![Page 61: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/61.jpg)
How do I use GP?● Weekly fert apps on greens, monthly on fariways
and every 3 weeks on Fairways● Use forecasted average temp to determine rates
○ Only use 30 yr average for tees and fairways● Adjust rate based on PGR use to 80%● Adjust rates based on measured growth rates● Not the rule, gets me into the right ballpark
![Page 62: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/62.jpg)
Web services● PACE Turf.org
provides estimated N requirement, growth potential and GDD globally
● igreenkeeping.com igkTool provides GP models in Europe
![Page 63: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/63.jpg)
Reduction in Quantity, not Quality● 80% reduction in
quantity of fertilizer applied to course
● Improved turf, less thatch, less disease less money
![Page 64: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/64.jpg)
Reduction in Quantity, not Quality
![Page 65: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/65.jpg)
Psychology of making switch to MLSN
● Easy to have doubts with a radical shift in thinking
● Just because you learned it in school doesn’t make it right
● Science is constantly improving
![Page 66: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/66.jpg)
Psychology of making switch to MLSN● First winter using
MLSN my greens look like this
● Not fertilizer related● Allows me to focus
on real issues (shade, drainage)
![Page 67: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/67.jpg)
What the plant needs
![Page 68: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/68.jpg)
Let’s put it all to work
![Page 69: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/69.jpg)
Plants are factories1. Nano technology at it’s finest2. Manufacturing cells with precision3. Plant growth is not a sloppy business4. We know what plants require for growth5. Provide what is needed and the system works fine6. Provide too few of any of the components and cell
manufacturing will slow and come to a halt7. Applying excesses usually does not cause a problem –
except for impact on budgets and environment
![Page 70: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/70.jpg)
![Page 71: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/71.jpg)
![Page 72: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/72.jpg)
![Page 73: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/73.jpg)
![Page 74: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/74.jpg)
Chlorophyll
![Page 75: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/75.jpg)
![Page 76: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/76.jpg)
![Page 77: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/77.jpg)
![Page 78: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/78.jpg)
![Page 79: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/79.jpg)
What does the plant need?• All of the essential parts/elements• Not more than the essential parts/elements, just like
building an engine• Having a large surplus of parts/elements is not
necessary – it is wasteful and expensive
![Page 80: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/80.jpg)
What does the plant need?• Light• CO2 • H2O• Minerals from the soil
– C H O P K N S Ca Fe Mg C. Hopkns CaFe Mighty Good– P K N S Ca Fe Mg
![Page 81: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/81.jpg)
What is the nutrient content of turf clippings?
Element Tissue ppm Ratio:NN 40000 1K 20000 0.5P 5000 0.13Ca 4000 0.08Mg 2500 0.05S 3000 0.06Fe 200 0.004Mn 75 0.0015
Roughly 90% of dry matter is carbon
![Page 82: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/82.jpg)
Proportional composition of turf tissue
N K P Ca Mg S Fe Mn
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Prop
ortio
nN:P:K (8:1:4)
![Page 83: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/83.jpg)
How are nutrients removed from the soil?
• Primarily by clipping removal• By leaching if excessive nutrients are applied• By leaching if the soil has high salts• Leaching will not remove elements held on the cation
exchange sites or associated with organic matter
![Page 84: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/84.jpg)
pH 7 and higher
Ca 18 36 76%Mg 4 8 17%K 2 2 4%Na 1 1 2%H 0 0 0%
![Page 85: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/85.jpg)
MLSN a+b-c=Qa + b – c = Q
a = ppm removal per time x time (days, months, year) based upon GPb = MLSN ppm baseline needed for good turf performancec = ppm reported on soil report
Q = Quantity of element in ppm needed to maintain soil levels above the MLSN guideline for the specified time
Application of 1 lb element/1000 sq ft ~ 33 ppm in top 4 inches or 22 ppm in top 6 inches
![Page 86: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/86.jpg)
K
![Page 87: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/87.jpg)
Southern Climate
![Page 88: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/88.jpg)
Q = a + b - c
MLSN
SLAN
Potassium lb/1000 sq ft = 0.05 x (149 – 37)Potassium lb/1000 sq ft = 5.6
Potassium lb/1000 sq ft x 1.2 = 6.7 lb K2O/1000 sq ft0-0-50 lb/1000 sq ft = 6.7/ 0.50 = 13 lb 0-0-50/1000 sq ft
Potassium lb/1000 sq ft = 0.05 x (110 – 37)Potassium lb/1000 sq ft = 3.7
Potassium lb/1000 sq ft x 1.2 = 4.4 lb K2O/1000 sq ft0-0-50 lb/1000 sq ft = 4.4/ 0.50 = 8.8 lb 0-0-50/1000 sq ft
“Q” = (desired ppm ”a+b” – observed ppm “c”)Q x 0.05 = lb/1000 sq ft
Q x 0.25 = g/m2
![Page 89: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/89.jpg)
P
![Page 90: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/90.jpg)
Southern Climate
![Page 91: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/91.jpg)
MLSN
SLAN
Phosphorus lb/1000 sq ft = 0.05 x (50 – 28)Phosphorus lb/1000 sq ft = 1.1
Phosphorus lb/1000 sq ft x 2.29 = 2.5 lb P2O5
Lb 11-55-0/1000 sq ft = 2.5 / 0.55 = 4.5 lb 11-55-0/1000 sq ft
See above. Desired MLSN = SLAN = 50 ppm P
Q = a + b - c“Q” = (desired ppm ”a+b” – observed ppm “c”)
Q x 0.05 = lb/1000 sq ftQ x 0.25 = g/m2
![Page 92: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/92.jpg)
Ca
![Page 93: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/93.jpg)
Southern Climate
![Page 94: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/94.jpg)
MLSN
SLAN
Calcium lb/1000 sq ft = 0.05 x (353 – 225)Calcium lb/1000 sq ft = 6.4
Gypsum (23% Ca) lb/1000 sq ft = 6.4 / 0.23 = 28 lb gypsum/1000 sq ft
Calcium lb/1000 sq ft = 0.05 x (750 – 225)Calcium lb/1000 sq ft = 26
Gypsum (23% Ca) lb/1000 sq ft = 26 / 0.23 = 113 lb gypsum/1000 sq ft
Q = a + b - c“Q” = (desired ppm ”a+b” – observed ppm “c”)
Q x 0.05 = lb/1000 sq ftQ x 0.25 = g/m2
![Page 95: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/95.jpg)
MLSN
SLAN
Deficit calcium g/m2 = 0.25 x (353 – 225)Deficit calcium g/m2 = 32
Gypsum (23% Ca) g/m2 = 32 / 0.23 = 139 g gypsum/m2
Deficit calcium g/m2 = 0.25 x (750 – 225)Deficit calcium g/m2 = 131
Gypsum (23% Ca) g/m2 = 131/ 0.23 = 524 g gypsum/m2
Q = a + b - c“Q” = (desired ppm ”a+b” – observed ppm “c”)
Q x 0.05 = lb/1000 sq ftQ x 0.25 = g/m2
![Page 96: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/96.jpg)
Mg
![Page 97: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/97.jpg)
Southern Climate
![Page 98: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/98.jpg)
MLSN
SLAN
Magnesium lb/1000 sq ft = 0.05 x (58– 53)Magnesium lb/1000 sq ft = 0.25
Lb (MgSO4*7H2O)/1000 sq ft = 0.25/ 0.1 = 2.5 lb (MgSO4*7H2O) /1000 sq ft
Magnesium lb/1000 sq ft = 0.05 x (140 – 53)Magnesium lb/1000 sq ft = 4.4
Lb (MgSO4*7H2O)/1000 sq ft = 4.4 / 0.1 = 44 lb (MgSO4*7H2O) /1000 sq ft
Q = a + b - c“Q” = (desired ppm ”a+b” – observed ppm “c”)
Q x 0.05 = lb/1000 sq ftQ x 0.25 = g/m2
![Page 99: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/99.jpg)
S
![Page 100: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/100.jpg)
Southern Climate
![Page 101: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/101.jpg)
MLSN
SLAN
Sulfur lb/1000 sq ft = 0.05 x (20 – 4)Sulfur lb/1000 sq ft = 0.8
Lb (0-0-50)/1000 sq ft = 0.8/ 0.17 = 4.7 lb (0-0-50) /1000 sq ft
Sulfur lb/1000 sq ft = 0.05 x (40 – 4)Sulfur lb/1000 sq ft = 1.8
Lb (0-0-50)/1000 sq ft = 1.8 / 0.1 = 11 lb (0-0-50) /1000 sq ft
Q = a + b - c“Q” = (desired ppm ”a+b” – observed ppm “c”)
Q x 0.05 = lb/1000 sq ftQ x 0.25 = g/m2
![Page 102: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/102.jpg)
Growth rate/clipping yield
• Grow as slow as possible for desired performance• Slower than the maximum potential of the plant to
produce biomass• Growth is restricted primarily by regulating nitrogen
applications• Typical annual yield is about 82 lbs/1000 sq ft (at 4%
N in tissue = 3.3 lbs N/1000 sq ft)
![Page 103: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/103.jpg)
ClippingsN:P:K8:1:4 for cool season3:1:2 for bermuda3:1:3 for paspalum
Apply 4 lbs Nyou need 0.5lb P and 2.0 lb K for replacement (8:1:4 N:P:K)
4lb N0.5 lb P x 2.29 = 1.1 lb P2O5
2 lb K x 1.2 = 2.4 lb K2O
Fertilizer: 4:1:2 (N:P2O5:K2O)
![Page 104: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/104.jpg)
Model Validation Examples
![Page 105: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/105.jpg)
Beevers and Cooper1964 Crop Science 4:139-143
• Growth chamber study• Ryegrass leaf yield• Three day-night temperature regimes 12-12 C, 25-25 C,
and 25-12 C (53.6-53.6 F, 77-77 F, 77-53.6 F avg 65.3 F)• Relative humidity 65 – 75%• 650 ft candles for 16 hrs per day (908 watts/m2 or 165
mol/m2) only need about 200 watts/m2 or 41 mol/m2
• Harvested leaves ¼ inch above soil surface and measured leaf area
![Page 106: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/106.jpg)
![Page 107: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/107.jpg)
![Page 108: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/108.jpg)
![Page 109: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/109.jpg)
Turf Growth and Soil Nitrate
• Geng et. al. 2014 University of Connecticut• Field with no fertilization or irrigation for 20 years mixed turf
and forbs• Planted Kentucky bluegrass and tall fescue• Applied urea at 0, 5, 10, 20, 30, 40, 50, 75, and 100 kg N/ha
monthly (50 kg/ha = 5 g/m2 = 1 lb/1000 sq ft)• Sandy loam soil 6.3% organic matter• Soil C:N 2.5:1 (lots of organic N available)• Measured soil NO3-N, turf quality and turf growth every 14 days
during the growing season for 3 yrs
![Page 110: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/110.jpg)
Storrs, CT Climate
![Page 111: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/111.jpg)
Geng et. al. 2014 Crop Science, 54:366-382LRP = Linear Response Plateau
![Page 112: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/112.jpg)
Geng et. al. 2014 Crop Science, 54:366-382
![Page 113: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/113.jpg)
Geng et. al. 2014 Crop Science, 54:366-382
15 g/m2
![Page 114: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/114.jpg)
Predicted lb N/1000 sq ft vs Observed N/1000 sq ft32 courses representing AL, CA, DE, FL, GA, MA, MI, NJ, NY, PA, TX, WV
0 2 4 6 8 10 120
2
4
6
8
10
12
14
16
18
f(x) = 1.1186393610972 x − 1.40757332360155R² = 0.519265979601828
Predicted N/1000 sq ft/year
Obs
erve
d N
/100
0 sq
ft/y
ear
![Page 115: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/115.jpg)
What about P and K… and other nutrients?
![Page 116: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/116.jpg)
Kussow, Soldat, Kreuser and HoulihanAgronomy doi 10.5402/2012/359284
1 lb clippings/1000 sq ft
![Page 117: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/117.jpg)
1 lb clippings/1000 sq ft 0.04 lb N removed
Kussow, Soldat, Kreuser and HoulihanAgronomy doi 10.5402/2012/359284
![Page 118: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/118.jpg)
1 lb clippings/1000 sq ft 0.04 lb N removed0.005 lb P removed
Kussow, Soldat, Kreuser and HoulihanAgronomy doi 10.5402/2012/359284
![Page 119: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/119.jpg)
1 lb clippings/1000 sq ft 0.04 lb N removed0.005 lb P removed0.02 lb K removed
Kussow, Soldat, Kreuser and HoulihanAgronomy doi 10.5402/2012/359284
![Page 120: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/120.jpg)
1 lb clippings/1000 sq ft 0.04 lb N removed0.005 lb P removed0.02 lb K removedN:P:K = 8:1:4
Kussow, Soldat, Kreuser and HoulihanAgronomy doi 10.5402/2012/359284
![Page 121: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/121.jpg)
What is the nutrient content of turf clippings?
Element Tissue ppm Ratio:NN 40000 1K 20000 0.5P 5000 0.13
![Page 122: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/122.jpg)
How much will be removed when applying 4 lbs N/1000 sq ft/year?
Element lb/1000 sq ft
Soil Test ppm in top 4 inches
K 2 65P 0.5 16
Application of 1 lb element/1000 sq ft increases soil ppm by about:
32.7 ppm in the top 4 inches21.8 ppm in the top 6 inches
![Page 123: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/123.jpg)
4 lbs N/1000 sq ftSufficient nutrition for a full year
Element
lb/1000 sq ft
Soil Test(4 in)ppm
SLAN ppm
MLSNppm
MLSN+
N 4K 2.0 65 110 37 102P 0.5 16 50 21 37
![Page 124: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/124.jpg)
Rutgers University New Brunswick, NJ (C3)http://www.paceturf.org/ipm/f_climate_english_20131025.xls
![Page 125: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/125.jpg)
GIS2017
![Page 126: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/126.jpg)
Declining A4 bentgrass Overseeded Bermuda surrounds
![Page 127: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/127.jpg)
Declining A4 bentgrass Overseeded Bermuda surrounds
![Page 128: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/128.jpg)
2000
![Page 129: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/129.jpg)
Trend in soil M3-P levels at Talega Country Club A4 Bentgrass
![Page 130: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/130.jpg)
Rocket Science meets Soil Testing
Acceler
ation
Deceleration
Fertilizer applied ppm/yearLess than Needed ppm
Fertilizer applied ppm/year More than Needed ppm
![Page 131: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/131.jpg)
Deficit Fertilization
Fertilizer applied ppm/yearLess than Needed ppm
![Page 132: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/132.jpg)
Excessive Fertilization
Fertilizer applied ppm/year More than Needed ppm
![Page 133: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/133.jpg)
Proper Maintenance Fertilization
![Page 134: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/134.jpg)
Declining A4 bentgrass Healthy overseeded Bermuda surrounds
Ryegrass overseeded bermuda collars.Complete starter fertilizer applied every season at overseed. Heavy poa invasion.
A4 bentgrass green, no P applied since construction. No poa invasion after 8 years.
![Page 135: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/135.jpg)
SLAN MLSNOlsen P 12 6Mehlich 3: P 50 21
K 110 37Ca 750 331Mg 140 47S 15 - 40 7
pH -- 5.5-8.5
![Page 136: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/136.jpg)
Talega Country Club Knockout trial ½ lb MAP/1000 sq ft, 2 applications
![Page 137: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/137.jpg)
Talega Country Club (pH 7.5)Compare Treated vs. Non-Treated Soil
![Page 138: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/138.jpg)
Talega Country Club (pH 7.5)
collar non treatedNOTES
10
20
30
40
50
P_E
A SY _
PPM
![Page 139: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/139.jpg)
Talega Country Club (pH 7.5)
![Page 140: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/140.jpg)
How much fertilizer is needed?
It depends upon how fast the grass grows at your location and how much N you provide.
Fun fact:5 g/m2 = 1 lb N/1000 sq ft = 33 ppm in top 4 inches
![Page 141: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/141.jpg)
www.paceturf.org/journal/climate25 ppm P/year @ 6 lbs N/1000 sq ft/year
![Page 142: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/142.jpg)
Trend in soil M3-P levels at Talega Country Club A4 Bentgrass
25 ppm P/year removal
![Page 143: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/143.jpg)
Trend in soil M3-P levels at Talega Country Club A4 Bentgrass
25 ppm P/year removal
![Page 144: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/144.jpg)
Trend in soil M3-P levels at Talega Country Club A4 Bentgrass
25 ppm P/year removal
![Page 145: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/145.jpg)
Trend in soil M3-P levels at Talega Country Club A4 Bentgrass
Crash and burn down here
![Page 146: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/146.jpg)
Trend in soil M3-P levels at Talega Country Club A4 Bentgrass
25 ppm P/year removal
![Page 147: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/147.jpg)
Trend in soil M3-P levels at Talega Country Club A4 Bentgrass
25 ppm P/year removal
![Page 148: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/148.jpg)
Trend in soil M3-P levels at Talega Country Club A4 Bentgrass
25 ppm P/year application
![Page 149: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/149.jpg)
Trend in soil M3-P levels at Talega Country Club A4 Bentgrass
25 ppm P/year application
![Page 150: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/150.jpg)
Trend in soil M3-P levels at Talega Country Club A4 Bentgrass
25 ppm P/year application
![Page 151: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/151.jpg)
Trend in soil M3-P levels at Talega Country Club A4 Bentgrass
25 ppm P/year application
![Page 152: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/152.jpg)
www.paceturf.org/journal/climate25 ppm P/year @ 6 lbs N/1000 sq ft/year
![Page 153: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/153.jpg)
Soldat and Kreuser, 2012 Wisc. Soil Report
![Page 154: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/154.jpg)
![Page 155: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/155.jpg)
Excessive Fertilization
Fertilizer applied ppm/year More than Needed ppm
![Page 156: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/156.jpg)
Recycled Water With 13 ppm Total N
1 2 3 4 5
![Page 157: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/157.jpg)
Recycled Water With 13 ppm Total N
![Page 158: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/158.jpg)
1999
![Page 159: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/159.jpg)
Recycled Water With 13 ppm Total N
![Page 160: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/160.jpg)
Recycled Water With 13 ppm Total N
![Page 161: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/161.jpg)
Recycled Water With 13 ppm Total N
![Page 162: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/162.jpg)
Recycled Water With 13 ppm Total N
![Page 163: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/163.jpg)
Recycled Water With 13 ppm Total N
![Page 164: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/164.jpg)
Each soil test result only represents a single point in time.
Keep all soil test results in case Mr. Peabody and Sherman stop by to help
![Page 165: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/165.jpg)
Organic matter-NH2 NH4-Fertilizer
NH4+
NO3-
NO2-
Plant Uptake
Rhizoplaneand
RhizosphereMicrobes
NO3-Fertilizer
Take all potential N sources into account
![Page 166: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/166.jpg)
Organic matter-NH2 NH4-Fertilizer
NH4+
NO3-
NO2-
Plant Uptake
Rhizoplaneand
RhizosphereMicrobes
NO3-Fertilizer
Take all potential N sources into account
![Page 167: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/167.jpg)
Elemental N release from organic mattersoil OM% Soil N ppm
If OM <= 1 Then ENR = 20 + ((OM - 0.5) * 40)
ElseIf OM > 1 And OM <= 3 Then ENR = 40 + ((OM - 1) * 20)
ElseIf OM > 3 And OM <= 5 Then ENR = 80 + ((OM - 3) * 10)
ElseIf OM > 5 And OM <= 10 Then ENR = 100 + ((OM - 5) * 5)
ElseIf OM > 10 And OM <= 20 Then ENR = 125 + ((OM - 10) * 0.5)
ElseIf OM > 20 Then ENR = 130
![Page 168: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/168.jpg)
% OM N ppmLb N/1000
sq ft % OM N ppmLb N/1000
sq ft1 40 1.2 11 125.5 132 60 2.4 12 126 153 80 3.6 13 126.5 164 90 4.8 14 127 175 100 6.1 15 127.5 186 105 7.3 16 128 197 110 8.5 17 128.5 218 115 9.7 18 129 229 120 11 19 129.5 23
10 125 12 20 130 24
![Page 169: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/169.jpg)
Recycled Water With 13 ppm Total N
![Page 170: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/170.jpg)
Elemental contribution from irrigation water
2.72 x ppm = lb/acre ftAcre ft/year x lb/acre ft = total pounds applied per acre
lb/acre * 0.5 = ppm in top 6 inches
2.72 x 13 ppm NO3-N = 35 lb N/acre ft35 lb N/acre ft x 3 acre ft/year = 105 lb N/acre/year 105 lb N/acre/year/43.56 = 2.4 lb N/1000 sq ft/year
105 lb N * 0.5 = 53 ppm increase in N
![Page 171: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/171.jpg)
![Page 172: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/172.jpg)
Estimate demand and supply
1.3 lb N/1000 sq ft (demand) x 43.56 = 57 lb/acre (demand)
57 lb/acre – 105 lb/acre (in water) = - 48 lb/acre (excess)
48 lb/acre x 0.5 = - 24 ppm (excess)
![Page 173: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/173.jpg)
Recycled Water With 13 ppm Total N
![Page 174: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/174.jpg)
www.paceturf.org/journal/climate25 ppm P/year @ 6 lbs N/1000 sq ft/year
![Page 175: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/175.jpg)
Estimate demand and supply
6.0 lb N/1000 sq ft (demand) x 43.56 = 261 lb/acre (demand)
261 lb/acre – 105 lb/acre (in water) = 156 lb/acre (deficit)
(156 lb/acre)/43.56 = 3.6 lb/1000 sq ft (deficit)
![Page 176: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/176.jpg)
Excessive nitrogen stress in collars (4 lbs N/1000 sq ft using ureaformaldehyde the previous year)
![Page 177: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/177.jpg)
30 ppm N
64 ppm N
Excessive nitrogen stress in collars (4 lbs N/1000 sq ft using ureaformaldehyde the previous year)
![Page 178: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/178.jpg)
15-0-0 faulty sprayer agitator – random patterns of damage
![Page 179: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/179.jpg)
77 ppm N 22 ppm N
15-0-0 faulty sprayer agitator – random patterns of damage
![Page 180: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/180.jpg)
1 2 3 4 5
![Page 181: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/181.jpg)
Recycled Water With 13 ppm Total N
![Page 182: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/182.jpg)
A quick test for soil nitrate levels with Hach water test strips. Dip into soil saturated with water, incubate 60 sec.
Nitrate levels (ppm) = (Dipstick X 1.5) + 2.9
(15 X 1.5) + 2.9 = 25.4 ppm
![Page 183: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/183.jpg)
Potassium
MLSN
If soil K ppm drop near 37 ppm, use a 1:2 N:K fertilizer
37 – 110 ppm K use a 2:1 N:K fertilizer
If soil K ppm exceeds 150 ppm, withhold K
![Page 184: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/184.jpg)
Rangefor annual N requirements
Lake Tahoe, CA : 1.8 lb N/1000 sq ft
Boca Raton, FL: 6.8 lb N/1000 sq ft
![Page 185: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/185.jpg)
K requirements
Lake Tahoe, CA : 1.8 lb N/1000 sq ft
How much K will be needed:
1) 1.8 lb K/1000 sq ft2) 0.9 lb K/1000 sq ft3) 4.0 lb K/1000 sq ft
![Page 186: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/186.jpg)
K requirements
Lake Tahoe, CA : 1.8 lb N/1000 sq ft
How much K will be needed:
1) 1.8 lb K/1000 sq ft2) 0.9 lb K/1000 sq ft3) 4.0 lb K/1000 sq ft
![Page 187: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/187.jpg)
K Requirements
Boca Raton, FL: 6.8 lb N/1000 sq ft
How much K will be needed:
1. 9.8 lb K/1000 sq ft2. 13.6 lb K/1000 sq ft3. 3.4 lb K/1000 sq ft
![Page 188: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/188.jpg)
K Requirements
Boca Raton, FL: 6.8 lb N/1000 sq ft
How much K will be needed:
1. 9.8 lb K/1000 sq ft2. 13.6 lb K/1000 sq ft3. 3.4 lb K/1000 sq ft
![Page 189: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/189.jpg)
Rutgers University New Brunswick, NJ (C3)http://www.paceturf.org/ipm/f_climate_english_20131025.xls
![Page 190: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/190.jpg)
20 25 30 35 40 45 50 55 60 65 700
5
10
15
20
25
30
35
40
45
2012 data presented at the 2013 CSSA Meetings by Charles SchmidPotassium Source and Rate Effect on Anthracnose Severity of Annual
Bluegrass. Charles, J. Schmid, Bruce B. Clarke, James A. Murphy, Rutgers University.
Mat Potassium (ppm)
Perc
ent A
nthr
acno
se MLSN K guideline 37 ppm
![Page 191: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/191.jpg)
ClippingsN:P:K8:1:4 for cool season3:1:2 for bermuda3:1:3 for paspalum
Apply 4 lbs Nyou need 0.5lb P and 2.0 lb K for replacement (8:1:4 N:P:K)
4lb N0.5 lb P x 2.29 = 1.1 lb P2O5
2 lb K x 1.2 = 2.4 lb K2O
Fertilizer: 4:1:2 (N:P2O5:K2O)
![Page 192: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/192.jpg)
Optimum Solar Radiation
• Cool-Season Turf:242 - 485 Ly/da (midpoint about 360 Ly/da)116 - 233 w/m2/da (midpoint about 175 w/m2/da)21 - 42 mol/m2/da (midpoint about 31 mol/m2/da)
• Warm-Season Turf: 812 - 969 Ly/da (midpoint about 890 Ly/da) 390 - 465 w/m2/da (midpoint about 427 w/m2/da)70 – 83 mol/m2/da (midpoint about 76 mol/m2/da)
w/m2/da = 0.48 Ly/daw/m2/da = 5.6 * mol/m2/da
![Page 193: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/193.jpg)
0
100
200
300
400
500
600
700
800
900
1000
1 2 3 4 5 6 7 8 9 10 11 12Month
Sola
r rad
iatio
n (la
ngle
ys/d
ay)
Phoenix, AZ
San Diego, CA
Woodbridge, CA
Houston, TX
![Page 194: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/194.jpg)
![Page 195: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/195.jpg)
224 w/m2
17 w/m2
![Page 196: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/196.jpg)
![Page 197: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/197.jpg)
![Page 198: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/198.jpg)
Inch
es o
f Wat
er
Barona Creek Golf Club, Sandy Clark, CGCSWeekly average 1.05 in (60% Eto), 0.48 in delivered weekly using
0.12 in every other day
![Page 199: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/199.jpg)
IrrigationInches of supplemental water per week
0.6 inches of supplemental water = 60% ETo
![Page 200: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/200.jpg)
Irrigation
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7WATER
150
200
250
300
350
CM
1000
![Page 201: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/201.jpg)
Calcium in Soil vs. TissueLooking for a plant response
![Page 202: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/202.jpg)
Soil Calcium vs. SodiumLooking for a soil response
P < 0.001
![Page 203: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/203.jpg)
Soil Calcium vs. SodiumLooking for a soil response
P < 0.001
![Page 204: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/204.jpg)
Soil Salinity vs. SodiumLooking for a soil response
P < 0.001
![Page 205: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/205.jpg)
Soil Salinity vs. SodiumLooking for a soil response
P < 0.001
![Page 206: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/206.jpg)
Soil Salinity vs. CalciumLooking for a soil response
P < 0.001
![Page 207: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/207.jpg)
Soil Salinity vs. CalciumLooking for a soil response
P < 0.001
![Page 208: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/208.jpg)
General Guideline Development1. Calibration studies under controlled
conditions2. Observations when deficits are observed and
fertilizers are added to correct the deficits and a positive response is observed
3. Data mining to determine the level of nutrients in soils that are associated with good turf performance (MLSN).
![Page 209: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/209.jpg)
MLSN DevelopmentData set:• Good performing turf only (evaluated by turf manager)• Total exchange capacity (by summation M3 extraction of
cations) less than 6 cmol/kg• Soil pH between 5.5 and 8.5• Soil pH above 7.5 for Olsen P• About 1500 samples are used in most of the analyses, 270
samples meet Olsen pH restrictions
![Page 210: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/210.jpg)
MLSN: Initial Observations• None of the data were normally distributed based upon
skewness (-0.65 < G1 < 0.65) and kurtosis (0.95 < G2 <1.75)
• Selection of 1.5 standard deviations below the mean resulted in negative values for several parameters
• Therefore, use of the normal distribution was not feasible
![Page 211: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/211.jpg)
Distribution Fitting• EasyFit by Mathwave used to identify an appropriate
model for the data• Log logistic was selected due to significant fit evaluated
by Kolmogrov Smirnov statistic
![Page 212: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/212.jpg)
Distribution FittingKolmogorov Smirnov
Log-Logisticp
Normalp
Olsen P 0.05 0.14Bray 2 P 0.03 0.16Mehlich 3 P 0.02 0.16 PSI 0.03 0.14 K 0.04 0.08 Ca 0.05 0.04 Mg 0.03 0.05 S 0.03 0.14KCL Extract NO3-N 0.04 0.24 NH4-N 0.09 0.21 Total-N 0.02 0.20
![Page 213: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/213.jpg)
MLSN• Defined as the soil nutrient concentration (ppm) at which
10% of the population falls below (10th percentile).• Calculated using the best-fit log-logistic cumulative
distribution function for: F(x) = 0.10
![Page 214: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/214.jpg)
MLSN M3 K = 37 ppm
Mehlich 3 Potassium
![Page 215: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/215.jpg)
MLSN M3 K = 37 ppm
Mehlich 3 Potassium
![Page 216: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/216.jpg)
MLSN M3 K = 37 ppm (10% less than 37 ppm)
SLAN M3 K = 110 ppm (75% less than 110 ppm)
Mehlich 3 Potassium
![Page 217: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/217.jpg)
Normal
Log-Logistic
Mehlich 3 Potassium
![Page 218: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/218.jpg)
NormalLog-Logistic
Mehlich 3 Potassium
![Page 219: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/219.jpg)
Normal
Log-Logistic
Mehlich 3 Phosphorus
![Page 220: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/220.jpg)
NormalLog-Logistic
Mehlich 3 Phosphorus
![Page 221: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/221.jpg)
Normal
Log-Logistic
Plant Available Nitrogen
![Page 222: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/222.jpg)
Normal
Log-Logistic
Plant Available Nitrogen
![Page 223: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/223.jpg)
Fertilization
• Use the minimum nitrogen to meet turf performance expectations
• Apply N, P and K in a ratio of 8:1:4 (N:P:K) if soil levels are in the sufficiency range – this will maintain balance between tissue removal and inputs
• Adjust N:P:K maintenance ratios as needed if P and K soil levels drop toward MLSN guidelines or start to increase
• Supplement maintenance applications if soil levels drop below sufficiency
![Page 224: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/224.jpg)
Global soil survey• Citizen science project to validate and expand on MLSN
guidelines• Turf managers from around the world contribute soils from
good performing turf• Analytical results (Brookside Labs) pooled with existing
database• MLSN guidelines revised as needed• Raw data available to academic community
![Page 225: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/225.jpg)
Mehlich 3 SLAN MLSN GSS 2014N = 84
GSS 2015N = 138
P 50 21 22 23
K 110 37 35 32
Ca 750 331 267 254
Mg 140 47 47 39
S 15 - 40 7 8 8
Global Soil Survey
![Page 226: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/226.jpg)
Mehlich 3 SLAN MLSN GSS Median
P 50 21 71
K 110 37 61
Ca 750 331 623
Mg 140 47 84
S 15 - 40 7 15
Global Soil Survey
![Page 227: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/227.jpg)
Regulations and fertilizer management
![Page 228: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/228.jpg)
Delaware fertilizer use restrictions and MLSN
![Page 229: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/229.jpg)
Delaware fertilizer use restrictions and MLSN
![Page 230: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/230.jpg)
Delaware fertilizer use restrictions and MLSN
Standard maintenance• Little traffic on turf area or minimal response
to plant growth as a result of traffic• Grass clippings recycled into the soil surface• Native healthy soil structure
![Page 231: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/231.jpg)
Delaware fertilizer use restrictions and MLSN
High maintenance• Irrigated and grass clippings removed• Vehicle or personnel traffic that creates visual
damage to the turf area• Insect pest pressure or disease pressure that
demonstrates visual damage and stress to the plant
• The introduction of sandy growth medium for improved drainage, such as California greens
![Page 232: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/232.jpg)
% OM N ppmLb N/1000
sq ft % OM N ppmLb N/1000
sq ft1 40 1.2 11 125.5 132 60 2.4 12 126 153 80 3.6 13 126.5 164 90 4.8 14 127 175 100 6.1 15 127.5 186 105 7.3 16 128 197 110 8.5 17 128.5 218 115 9.7 18 129 229 120 11 19 129.5 23
10 125 12 20 130 24
![Page 233: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/233.jpg)
Delaware fertilizer use restrictions and MLSN
![Page 234: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/234.jpg)
Delaware fertilizer use restrictions and MLSN
![Page 235: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/235.jpg)
Maryland fertilizer use restrictions and MLSN
![Page 236: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/236.jpg)
Maryland fertilizer use restrictions and MLSN
![Page 237: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/237.jpg)
Maryland fertilizer use restrictions and MLSN
![Page 238: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/238.jpg)
Maryland fertilizer use restrictions and MLSN
![Page 239: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/239.jpg)
Maryland fertilizer use restrictions and MLSN
![Page 240: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/240.jpg)
Maryland fertilizer use restrictions and MLSN
![Page 241: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/241.jpg)
Maryland fertilizer use restrictions and MLSN
![Page 242: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/242.jpg)
Maryland fertilizer use restrictions and MLSN
![Page 243: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/243.jpg)
Michigan fertilizer use restrictions and MLSN
![Page 244: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/244.jpg)
Michigan fertilizer use restrictions and MLSN
![Page 245: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/245.jpg)
Michigan fertilizer use restrictions and MLSN
![Page 246: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/246.jpg)
![Page 247: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/247.jpg)
New Hampshire fertilizer use restrictions and MLSN
![Page 248: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/248.jpg)
New Hampshire fertilizer use restrictions and MLSN431:4-a Nitrogen Content of Fertilizer. I. Limit to 0.7 lb soluble N/1000 sq ft per
applicationII. Limit to 0.9 lb total N/1000 sq ft per
application – 20% slow release NIII. Limit to 3.25 lb N/1000 sq ft per yearIV. No enhanced efficiency fertilizer shall
exceed a single application rate of 2.5 lbs. N/1000 sq ft nor release at greater than 0.7 pounds per 1,000 square feet per month
![Page 249: MLSN and Growth Potential presentation GIS17](https://reader036.vdocument.in/reader036/viewer/2022062522/58abc8151a28ab68068b530d/html5/thumbnails/249.jpg)
New Hampshire fertilizer use restrictions and MLSN