cover crops with direct seed rotation in north central idaho · cover crops with direct seed...
TRANSCRIPT
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COVER CROPS WITH DIRECT SEED ROTATION IN NORTH CENTRAL IDAHO
University of Idaho Extension
Research and Demonstration ProjectFunded through Award #2011-68002-30191 from USDA National Institute of Food and Agriculture
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PERSONNEL
Ken Hart, University of Idaho Extension Educator, Lewis County
Jim Church, University of Idaho Extension Educator, Idaho County
Doug Finkelnburg, University of Idaho Extension Educator, Nez Perce County
Kevin Seitz, NRCS Soil Conservationist
Drew Leitch, Cooperator
Mart Thompson, Cooperator
Vern McMaster, NRCS Soil Conservationist (retired)
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GOALSDemonstrate cover crop benefits including enhanced soil biology, improved crop rotation diversity, improved soil
structure, nutrient cycling, forage production, and reduced erosion.
Demonstrate cover crops seeded in the fall and sprayed out for spring seeded cereal crop production.
Demonstrate cover crops seeded in the late spring and sprayed out in fall for fall seeded cereal crop production, with and
without grazing component.
Increased knowledge by livestock producers on the potential to extend their grazing season using unconventional forages
seeded as cover crops.
Study the effect of cover crops on the following cereal crop productivity.
Producers will be more willing to try cover crops due to the availability of current, local research information.
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GOALSDemonstrate cover crop benefits including enhanced soil biology, improved crop rotation diversity, improved soil
structure, nutrient cycling, forage production, and reduced erosion.
Demonstrate cover crops seeded in the fall and sprayed out for spring seeded cereal crop production.
Demonstrate cover crops seeded in the late spring and sprayed out in fall for fall seeded cereal crop production, with
and without grazing component.
Increased knowledge by livestock producers on the potential to extend their grazing season using unconventional forages
seeded as cover crops.
Study the effect of cover crops on the following cereal crop productivity.
Producers will be more willing to try cover crops due to the availability of current, local research information.
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GOALSDemonstrate cover crop benefits including enhanced soil biology, improved crop rotation diversity, improved soil
structure, nutrient cycling, forage production, and reduced erosion.
Demonstrate cover crops seeded in the fall and sprayed out for spring seeded cereal crop production.
Demonstrate cover crops seeded in the late spring and sprayed out in fall for fall seeded cereal crop production, with and
without grazing component.
Increased knowledge by livestock producers on the potential to extend their grazing season using unconventional
forages seeded as cover crops.
Study the effect of cover crops on the following cereal crop productivity.
Producers will be more willing to try cover crops due to the availability of current, local research information.
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GOALSDemonstrate cover crop benefits including enhanced soil biology, improved crop rotation diversity, improved soil
structure, nutrient cycling, forage production, and reduced erosion.
Demonstrate cover crops seeded in the fall and sprayed out for spring seeded cereal crop production.
Demonstrate cover crops seeded in the late spring and sprayed out in fall for fall seeded cereal crop production, with
and without grazing component.
Increased knowledge by livestock producers on the potential to extend their grazing season using unconventional
forages seeded as cover crops.
Study the effect of cover crops on the following cereal crop productivity.
Producers will be more willing to try cover crops due to the availability of current, local research information.
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COVER CROP STUDY PROJECTS• On-farm test of fall-seeded cover crops followed by spring crop (canola), 2012-13
• On-farm test of spring-seeded cover crops followed by fall sown crop (wheat),
with and without grazing treatment, 2013-14
• Cover crop variety demonstration, 2014-16
• Cover crop seeding date study, 2014, 2016
• Cover crop seeding rate study, 2015
• Cover crops in five-year rotation study, 2014-2019
• On-farm cover crop grazing demonstrations, 2014-2016
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ON FARM TEST DESIGN
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FALL SEEDED COVER CROPSMarch 15, 2013
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FALL SEEDED COVER CROPSCover Crop Planting – Fall Seeded
Cover crops were direct seeded on 10-12-12. Plots were planted in 45’ x 800’ strips.
Treatments included:
1) Chemical Fallow (control)
2) Nitrogen Mix (winter peas, winter oats, common vetch, red clover, and winter lentil)
3) Soil Enhancement Mix (Crimson clover, red clover, winter pea, hairy vetch, winter lentil, winter triticale,
spring barley, winter oats, purple top turnip, nitro radish, winter canola)
Cover crops terminated in March and spring canola was direct seeded. Strips were harvested in the fall of 2013.
Canola Yields— % difference from fallow
Treatment 1 – Chemical Fallow = 1782.7 lb/ac 0
Treatment 2 – Nitrogen Mix = 1794.8 lb/ac +1
Treatment 3 – Soil Enhancement Mix = 1661.7 lb/ac -7
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SPRING SEEDED COVER CROPS
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SPRING SEEDED COVER CROPSCover crops were direct seeded in 45’ x 1200’ strips in winter wheat stubble on May 20, 2013, . Crop development was monitored
throughout the growing season.
Treatments included:
1) No cover crop (chemical fallow, control)
2) Nitrogen mix (Lentils, common vetch, spring forage peas, rapeseed, flax)
3) Grazing mix (Common vetch, spring forage peas, crimson clover, spring oats, spring barley, rapeseed, forage turnips,
forage radish, pearl millet)
4) Soil enhancement mix (Crimson clover, soybean, winter pea, hairy vetch, spring forage peas, spring triticale, spring
barley, pearl millet, oats, purple top turnip, rapeseed, nitro radish, forage brassicas, sunflower, buckwheat)
Plots were grazed three times with target dates of August 1, August 15 and September 1. Each time a 200’ plot length was
exposed to grazing. The final 600’ of plot length was not be grazed. All plots were be sprayed out on about September 15 prio r to
direct seeding winter wheat after September 25. Winter wheat yields will be evaluated in fall 2014.
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FORAGE TESTS
Forage Analysis Sample Date - 7/30/2013
As Rcvd. Crude Acid Det. Nitrate NE/LACT TDN Est.
Treatment Moisture % Protein % Fiber % aNDF % Ash % (ppm) MCAL/LB %
Average 2 6.6 13.6 30.5 35.7 9.5 550 0.67 55.5
Average 3 6.5 9.0 32.5 45.4 8.7 544 0.64 51.5
Average 4 5.0 8.2 30.6 45.3 8.2 538 0.67 51.5
Forage by Treatment (lbs/ac)
Production Post Graze Consumed
Treatment
2 - Nitrogen 5569.93 896.31 4673.62
3 - Grazing 6668.98 1920.67 4748.32
4 - Soil 5175.13 1931.34 3243.79
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GRAZING• 24 head stocked at a rate of 1.4 AUM's per acre.
• Turned the cattle in on the cover crop trial on August 13th.
• They were removed the third week of September.
• The cattle were moved to a new paddock every other day. They had
access to the paddocks previously grazed.
• The rate of gain was 1.5 pounds per day per head.
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0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
Winter Wheat (bu/acre) after Spring-Sown Cover Crops
TREATMENTS:
1. No cover crop (chemical fallow)
2. Nitrogen mix (Lentils, common vetch, spring forage peas, rapeseed, flax)
3. Grazing mix (Common vetch, spring forage peas, crimson clover, oats, spring barley, rapeseed, Appine forage turnips, GroundHog forage radish)
4. Soil enhancement mix (Crimson clover, soybean (non-GMO), winter pea, hairy vetch, spring forage peas, winter triticale, spring barley, pearl millet, oats, purple top turnip, rapeseed, nitro radish, Pacific Gold mustard, sunflower, buckwheat)
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SMALL PLOT DEMONSTRATION SITE
Beneficial insect mix
Austrian winter pea
“Flex” forage pea
“Nutrigreen” forage pea
Spring barley
Bob winter oat
“Everleaf” oat
Winter triticale
“Boyer” barley
Hairy vetch
“Morton” winter lentil
Spring lentil
“Daikon” radish
“Groundhog” radish
“Appin” turnip
“Athena” canola
Rape
Teff
Pearl millet
Sorghum Sudan grass
“Winfred” forage brassica
“Graza” forage brassica
“Hunter” forage brassica
“Corrine” Ethiopian cabbage
Mustard mix
Buckwheat
Sunflower
Safflower
Phacelia
Flax
Red clover
Ladino clover
Crimson clover
Yellow blossom sweet clover
Soybean
Bell bean
Common vetch
Sunn hemp
Cowpea
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Cover Crop
Cocktail Mixes Oats
2- oats, forage pea
5- oats, forage pea, radish, sorghum sudan grass, soybean
8- oats, forage pea, radish, sorghum sudan grass, soybean, buckwheat, turnip, flax
12- way oats, forage pea, radish, sorghum sudan grass, soybean, buckwheat, turnip, flax, proso millet, crimson clover, sunflower, lentil
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COVER CROP SEEDING DATEOats, 2- (oats, forage pea), 5- (add radish, sorghum sudan
grass, soybean), 8- (add buckwheat, turnip, flax), and 12-
way (add proso millet, crimson clover, sunflower, lentil)
Seeded May 15 and June 6-9
Harvested August 1 and August 26
Yield and Protein
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COVER CROP SEEDING DATE
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0.000
1000.000
2000.000
3000.000
4000.000
5000.000
6000.000
2 Mix,Early
5 Mix,Early
8 Mix,Early
12 Mix,Early
Oats,Early
2 Mix,Late
5 Mix,Late
8 Mix,Late
12 Mix,Late
Oats, Late
Pounds Dry Weight
Tukey-Kramer all pairs comparisons, 5% significance level:
• Early-seeded oats significantly higher yield than all late-seeded mixes and the early-seeded 8- and 12-species mixes.
• Early-seeded 2-species mix significantly higher yield than late-seeded 8-species mix.
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10.50
11.00
11.50
12.00
12.50
13.00
13.50
14.00
2 Mix,Early
5 Mix,Early
8 Mix,Early
12 Mix,Early
Oats,Early
2 Mix,Late
5 Mix,Late
8 Mix,Late
12 Mix,Late
Oats, Late
Percent Crude Protein
Tukey-Kramer all pairs comparisons, 5% significance level:
• Late-seeded 12-species mix significantly higher protein than all early-seeded 5-species and 12-species mixes.
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FIVE YEAR ROTATION STUDY
Fallow, 2, 5, 8, 12 way mixes
Two management levels
a) Traditional spray out
b) No spray out until weed spray application
Full and 50% fertility
Rotation: cover crops, winter
wheat, cc, spring barley, cc, spring
peas, winter wheat
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Do Cover Crops in Rotation…
Affect Annual Crop Performance
Reduce Fertilizer
Requirements
?
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DIRECT SEED WINTER WHEAT - 2014
• Dry Conditions• Residue an issue
but…• Volunteer
bindweed bound in shanks
10/13/14
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• Abrupt Hard Winter • High PPT Events• Vole Damage
4/23/15
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HARVES
T PREP
7/17/15
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PLANTING COVER CROP
MIXES – FALL 2015
10/3/15
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COVER CROP GRAZING
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Cover Crop Mix
• Ever Leaf Oats• Turnips• Radishes• Forage Peas• Triticale• Crimson Clover• Canola
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THOMPSON FARM COVER CROP GRAZING2014
• 10 acres planted early June.
• Cattle turned out mid July.
• Fresh Quality test = 19.2% CP,
58.5% TDN
• Small paddocks used.
• Cattle moved daily.
• Cattle gained over 2 pounds
per day.
• Estimated net return = $300
per acre
2015• Seeded a 67 acre field – May 4th
• June 23rd – turned in 22 head –yearling heifers & bull
• Paddock grazed• July 17th – cut 10 acres of hay =
12 tons• July 22-25th – swathed
remainder of field into windrows.
• Windrows grazed• Aug. 15 – Added 28 cow calf
pairs• Sept. 1 – Moved herd to CRP
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2015 THOMPSON FARM
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DREW LEITCH COVER CROP GRAZING2014
• 46 acres planted early May
• 46 cow/calf pairs turned out late June
• Estimated pounds of forage needed per
day = 2000 pounds. 50 pounds as fed
per pair per day. Estimated production
per acre = 4 tons
• At 50% utilization = 2 tons of forage
available per acre
• Recommended paddock size = 2 acres
• Duration = 4 days per paddock 23
paddocks
• Grazing time 92 days
• Approx. 1/3 of field swathed and
windrow grazed.
• Approx. 1/3 of field swathed and bale
grazed
2015
• 150 acres planted with six way species, early May
• 75 head of spayed heifers and 105 head of cows & calves grazed 50 acres for 65 days.
• 75 spayed heifer grazed for 65 days• ADG was 1.7 • Grazed on a per pound of gain basis• $$ at least $0.50 per pound of gain or
higher• Paddock grazed and windrow grazed 50
acres for 65 days.• Yrlg. Heifers removed• 105 cows & calves grazed the windrows
& bales on total 150 acres as of Nov. 1st.
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2015 LEITCH FARM
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PLANTING SPECIFICS CONSIDERATIONS
Seeding rate = 65 lbs total –even out species by weight.
Estimated seed cost = $30/acre
Fertilizer = 100 lbs of 16-20-0
Fencing = depending on type of fence
Water source
Increase in labor to move
fences
Availability of cattle/livestock
Haying equipment
Market for forage
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Paddock Fence
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Fence Installation
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Shade and Water
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CONTACT:
Ken Hart, UI Extension Educator, [email protected]
Jim Church, UI Extension Educator, [email protected]
Doug Finkelnburg, UI Extension Educator,
Drew Leitch, Leitch Farms, [email protected]