nutrient management for organic berry...
TRANSCRIPT
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Nutrient management for organic berry production
Javier Fernandez-Salvador Assistant Professor (Practice)
Oregon State University. Small Farms Program
OSU Extension Service, Marion County
1320 Capitol St NE, Suite 110. Salem, OR 97301
Tel: 503-373-3766
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Today’s presentation Tools for your organic berry project:
• NRCS web soil survey
• Soil sampling and testing
• Land history and project map
Berry fertility
• Understanding the crop: time of application
and pH.
• Crop requirements: amount of fertilizer
needed.
• Tissue sampling. Evaluating fertility program
• Organic fertilizers: sources of the nutrients
to apply and method of application
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Chehalis Series
• The Chehalis series consists of very deep, well drained soils that formed in silty and loamy mixed alluvium. Chehalis soils are nearly level to undulating flood plains. The mean annual precipitation is about 50 inches and the mean annual temperature is about 52 degrees F.
• TAXONOMIC CLASS: Fine-silty, mixed, superactive, mesic Cumulic Ultic Haploxerolls
• GEOGRAPHIC SETTING: The Chehalis soils are on flood plains at elevations of 30 to 1,600 feet. They formed in silty and loamy mixed alluvium. Slopes are 0 to 3 percent. These soils occur in a climate having cool, dry summers, and cool, wet winters. The average annual precipitation is 30 to 70 inches. The average January temperature is 39 to 40 degrees F. and the average July temperature is 64 to 67 degrees F. The mean annual temperature is 50 to 55 degrees F. The average frost-free season (32 degrees F) is 150 to 235 days.
• DRAINAGE AND PERMEABILITY: Well-drained; slow runoff; moderate permeability. Chehalis soils are subject to occasional flooding for brief periods from November to April.
• USE AND VEGETATION: These soils are used mostly for cropland, hay and pasture.Native vegetation is Douglas fir, red alder, grand fir, western redcedar, bigleaf maple and Oregon oak with an understory of vine maple, trailing blackberry, western swordfern, western brackenfern, Oregon grape, wild ginger, violet, and western rattlesnake plantain.
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Soil sampling: collect representative samples, based on crop and land history.
Sample at 1.5 to 2 feet depth (in row) for caneberry and blueberry. Remove mulch. Same time of the year but not during fertilization
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Native hedgerow, 16 ft. wide
Road
Berry Field
Hedgerow to boundary with filberts, 35 ft.
Tool shed
Pump house
Non-organic hops, east of red line
Organic vegetables, west of red line
Native hedgerow, 8 ft. wide
Willows and native hedgerow, 11 ft. wide
Non-organic cover crop, south of red line
Berries to veggies, 71 ft.
Non-organic filberts, north of red line
Berries to veggies, 135 ft.
N
Space between hedgerows, 11 ft.
Organic Farm: New Organic Berry Project
Berries to hedgerow, 6 ft.
Worker Area
Hedgerow to boundary with hops, 22 ft.
Berries to hedgerow, 13 ft.
Berries to hedgerow, 9 ft.
Packing tent
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Section 2
Section 3
Section 1
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Soil and tissue results
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Understanding the crop: time of fertilizer application and pH
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Organic Strawberries
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Strawberries: Growing Systems 1. June Bearing - Matted row.
Fertilize at renovation, when plants form
flower buds for next year’s crop. No fertilizer
applications in the spring. More leaves but
same yield and increased fruit rot.
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Organic fertilizer preferred in
liquid form and doled out. Solid
fertilizers will take longer to
become available to plant.
Some growers spread pelletized
fertilizer mixed with biologically
active compost and irrigation.
June bearing strawberry renovation
Photos: B. Strik
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2. Day Neutral. Plasticulture – Hill System.
• In organic systems only 1 or 2 production
seasons with the same plants are
recommended for maximum yield.
• Solid fertilizer pre-planting only.
• Fertigate required amount, constantly and
doled out during the entire fruiting season.
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Caneberries
• In organic systems fertilize summer bearing
cultivars (raspberry and blackberry) during the
spring when fertilizers are being taken into the crow,
floricanes, primocanes and into the fruit.
• Solid organic fertilizers better applied 1 or 2 times in
early (end March) and late spring (end May or
June).
• Liquid fertilizers can be applied from March until
June. Divide the recommended amount in the
number of desired applications.
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Primocane fruiting raspberry
• In organic systems fertilize primocane fruiting
raspberry with the required amount split between a
solid fertilizer pre-planting in the spring and the rest
in a liquid form, constantly and doled out during the
entire fruiting season.
• This information is anecdotal from grower
experiences and demo plantings and more research
is needed.
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Blueberry
• In organic systems start fertilization in early bloom and
finish in late June if using liquid fertilizers with a dolled
out application regime.
• If using solid products apply the entire recommended
amount in 1 or 2 applications before bloom or before
bloom and early June.
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pH
Figure: B. Strik
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• Soil pH too high for organic blueberries (7 or close
to neutral) = lime induced iron deficiency.
• Organic fertilization also lowers soil pH (every 100
lb N/acre/year drops soil pH 0.1 unit), just slowly
than synthetic fertilizers.
• In perennial organic berry crops is hard to drastically
manipulate pH with lime or sulfur once crop has
been established.
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Crop requirements: amount of fertilizer needed.
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Adequate levels of SOIL nutrients for berry crops
Source: Hart et al., 2006; Strik, 2014
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Amend soil for adequate crop needs.
Source: Hart et al., 2006; Strik, 2014
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Evaluating fertility program Tissue testing
Adjust fertility as needed next year
Source: Hart et al., 2006; Strik, 2014
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5. Continuing evaluation of impact.
Results for tissue testing practices, 2015-2016 organic blueberry survey.
Fernandez-Salvador ,Strik, Stephenson 2016
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When to test?
Sample primocanes in raspberry and blackberry and shoots from 1 yr. old wood in blueberry Sample most recent fully expanded leaves
Source: Hart et al., 2006; Strik, 2014
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Organic fertilizers: sources of the nutrients to apply and method of application
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There is a wide range of material presentations
• Powders, granules, pellets
• liquids
Important considerations for choosing a fertilizer for your organic farm
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Total nitrogen
(not available N
NH4 or NO3)
7
Available
phosphate
(P2O5)
1
Available
potash
(K2O)
2
Compliance program
seal(s)
Basic standard of
identity
Understanding an organic fertilizer label
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Bone Meal Feather meal
Bone and meat meal Fish Meal
Blood Meal
1) Animal origin meals
Organic Fertility Sources
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2) Manures of animal origin
Raw
Not for human
consumption
90-120 day rule
Composted
C:N ratio (25:1-
40:1) 131 F and
170 F for 3 days
OR 15days
Processed
150 F for 1 hour
or more and 12%
moisture. Zero
pathogen residue
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3) Plant materials and meals
Soybean meal
Rice or grain meals/hulls
Cotton (seed meal or gin trash)
Beet, roots and other pulps
Alfalfa meal
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4) Minerals
Potassium sulfate; SOP
Magnesia (0-0-22)
Muriate of potash KCl (0-0-60) Chilean nitrate (16-0-0)
Rock phosphate (0-3 to 8-0)
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5) Liquid organic fertilizers
Animal based: fish, guanos, etc. Plant based: corn, soy solubles
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Organic Fertilizer Variability (Data from 2011,2012, 2013 study)
Rates: 1) 50 lb/acre N per year (2011-12). 2) 50 lb/acre N per year in 2011–2012 and 80 lb/acre in 2013
Pelletized, processed
poultry litter “poultry”
Pelletized soybean
meal “soy” Fish hydrolysate and
emulsion blend with added
molasses “fish”
Corn steep liquor
and fish hydrolysate
blend
Fernandez-Salvador ,Strik, Bryla 2012, 2013
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Target rate of 56 kg*ha-1 (2011-12) and 89 kg*ha-1 (2013)
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Fertigation
• 2011-2013 Study
• Impact of Liquid Fertilizers on Emitter Performance Fertigation Management in Organic Blackberry
Fernandez-Salvador ,Strik, Bryla 2013
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Drip Performance: Treatments
The impact of fertigation on drip system performance was evaluated with two maintenance options, “flushing” and “no flushing” of the drip lines for each of the two fertilizer sources.
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Results Flow rates:
4.5% in the first year
19% in the second year
No
difference
No
difference
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Important fertilizer consideration
N:P ratio in organic fertilizers
N P2O5 K2O
Mature
Blueberry crop 150 60 170
3.5 tons chicken
manure 145 210 210
Organic Fertilizers (%)
Total N P2O5 K2O
Dairy manure & bedding 0.5 0.2 0.5
Poultry manure & litter 2.8 2.3 1.7
Pelleted chicken manure 4.0 3.0 3.0
Composted poultry
manure 0.9 2.0 1.2
Composted dairy manure 0.6 0.6 1.3
Specialty Products
Total N P2O5 K2O
Feather meal 12 0 0
Blood meal 12 0 0
Fish meal 10 6 2
Soybean meal 7 2 1
Sulfate of potash 0 0 50
Muriate of potash 0 0 60
Bone meal 2 15 0
Rock phosphate 0 2 0
Tables courtesy Nick Andrews OSU
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OSU Organic Fertilizer and Cover Crop Calculator
Source: http://smallfarms.oregonstate.edu/calculator
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January 10, 2017
44
Thank you! Questions?