SOIL HEALTH COVER CROPS RELAY CROPPING€¦ · SOIL HEALTH – COVER CROPS – ... Expanding the...
Transcript of SOIL HEALTH COVER CROPS RELAY CROPPING€¦ · SOIL HEALTH – COVER CROPS – ... Expanding the...
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SOIL HEALTH – COVER CROPS –
RELAY CROPPING Sustainable Agriculture in North Dakota
Tim Semler – Extension Agent
Farm Business Management
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As a crop producer only – Why
grow a cover crop (CC)? CC pros:
• Prevented Planting or sizeable wet areas
• Plant growth feeds soil organisms and
keeps soils active and “healthy”
• Idled/fallowed soil organisms like Rhizobia
and Mycorrhriza will go to “sleep”
• Utilize excessive moisture – allows soil
salts to leach deeper into profile
• CC - legumes will “fix” nitrogen
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Cover Crop Pros cont’d.
• Tap-rooted CC plants may bring deeper
soil nutrients closer to soil surface (P-K-S)
• Tap-rooted CC can break-up clay pans
• Improve soil organic matter content
• Provide high quality late season grazing
for cattle and sheep
• What are your goals from a Cover Crop?
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Cover Crop Cons
• Certain seed mixes can use up existing
fertility – are they a good trade-off?
• Crop Insurance limitations ??
• Differences between PP & Failed Acres
• Prevent Plant – cannot harvest until Nov. 1
• Cover Crop Choice affects residue left in
field next spring – No-Till operations
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2010 CC Seed Costs ?
• Purple Top Turnip - $2.37/#
• Pasja Radish - $3.73/#
• YB Sweetclover - $2.37/#
• Red Clover - $2.37/#
• Grain Millet - $0.32/#
• Hay Millet - $0.56/#
• Field Peas - $0.07/# (bin run)
• Barley - $0.10/#
• Oats - $0.14/#
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Cover Crop Considerations
• Reason?
• Cost? Mix your own or Custom Blend?
• Time of year to seed?
• Choice of warm season vs. cool season
• Seeding rate
• Pre-seeding weed control
• Graze or Not?
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POTENTIAL SEED RECIPES Not “gospel” !
Radish – 2# Canola – 3# Radish – 2#
Turnips – 2# Bly/Oats – 30# Turnip – 2#
Bly/Oats – 32# Peas – 30# Bly/Oats – 20#
$16.68 $9.10 $17.10
Radish – 2# Radish – 2# Hay Millet – 5#
Turnip – 2# Turnip – 2# Bly/Oats – 30#
Bly/Oats – 30# Bly/Oats – 20# Radish – 2#
Clover – 1# Sunflowers – 5# Turnip – 2#
$18.57 $19.80 $19.00
Grain Millet – 5# Bly/Oats – 40# Radish – 3#
Bly/Oats – 30# Peas – 30# Bly/Oats – 30#
Radish – 2# Clover – 2# Clover – 2#
Turnips – 2# $11.64 $19.93
$17.80
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Mandan USDA – ARS
Cover Crop Chart www.mandan.ars.usda.gov
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Do we want to see this next season?
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Planting a Cover Crop
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Blending Oats + Turnip + Radish Seed
30# + 1.5# + 1.5# = $13.35/A.
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Seeding – Aug. 27th
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Oats – Turnips – Radish
Emergence Sept. 7th
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Cover Crop Stage – Oct. 1st
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Cover Crop Growth – Oct. 1st
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Glen Cunningham – Lansford
on Prevented Planting • Seeded August 3rd
• Custom Mix – 25% Oats + 25% Millet +
19% Peas + 16% Barley + 9% Turnips +
6% Radish
• Seed Cost per Acre = $22.65
• Grazed Cows/Calves after Nov. 1
• Herd adapted quickly – no digestive probs.
• Calves actually reduced creep feed cons.
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Cunninghams will repeat in 2011
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Cunninghams Cont’d.
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Cunninghams – Turnip & Radish
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Pat Flaherty – Westhope
on Prevented Planting • Seeded July 26th
• Bin Run Conf. Sunflowers + Arvika Peas +
Millet + Turnips + Radish
• Herd turned-out after Nov. 1
• Grazed clean by Nov. 17 – roots to the soil
• Will incorporate this system as an annual
forage management tool
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Pat Flaherty – Oct. 12th
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Pat Flaherty cont’d.
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Pat Flahery cont’d.
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Pat Flaherty cont’d.
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Herd Turnout – Oct. 24th
Growing Period is Over
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Radish & Turnips do not like
Saline-Flooded Soils
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Oct. 24th cont’d.
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Oct. 24th cont’d.
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Oct. 24th cont’d.
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Field Pea Relay Cover Crop: Expanding the Benefits of Peas in Rotation
Blaine G. Schatz
Carrington Research Extension Center
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Field Pea Relay Cover Crop System
** A system where field pea seeds that are lost at
harvest are encouraged to germinate and re-grow.
** The re-growth becomes a source of organic matter,
nitrogen, and other benefits that otherwise would not exist.
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NDSU Carrington Research Extension Center
Field Pea Relay Cover Crop System
• The opportunity exists for
significant pea development.
• Field pea harvest occurs
early in season.
– Late July to mid-August.
• Field pea are tolerant to
freezing temperatures.
• Experience indicates pea
growth continues until late
October to early November.
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Field Pea Relay Cover Crop System
• Pea seeds lost at harvest must be
introduced to the soil to achieve
proposed benefits.
– Seed to soil contact required for
germination.
• Methods to foster seed to soil
contact.
– Disking (light)
– Coulter Harrow
– Roller
• Timing and effectiveness of this
operation is important to attain
maximum re-growth.
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Field Pea Relay Cover Crop System Management Option: Graze Re-growth
Pea re-growth is a high quality and
very palatable forage.
Ex: CREC 2008 -16 acre pea field
Harvested Aug.10 ~ Disked Aug.20
52 Beef cows grazed re-growth
- Turned in on October 15
- Grazed for 21 days (Nov. 4)
-Est. Intake = 2,800 lbs DM/A
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Field Pea Relay Cover Crop System
• Enhances/Increases:
• Organic matter
• Soil nitrogen
• Biological activity
• Soil cover/stabilization
• Grazing or Forage options
• Re-crop response
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Pea Relay Cover Crop: Nitrogen Benefit
* Growing conditions
in the fall are very
favorable for
symbiotic nitrogen
fixation in field pea.
* Generally cool
growing conditions.
* High numbers of
rhizobia bacteria,
‘inoculum’ , from
crop just grown.
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Field Pea Relay Cover Crop System Organic Matter and Nitrogen Yield
• Field 14B
– 3026 lb dry matter / Ac
– 129 lbs total N at 4.3% N
• Field 14A
– 1582 lbs dry matter / Ac
– 63 lbs total N at 4.0% N
• Field 12
– 1877 lbs dry matter / Ac
– 69 lbs total N at 3.7 % N
2008 replicated samples from
CREC commercial field pea fields
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NDSU Carrington Research Extension Center
• 2007
– 3400 lbs dry matter / Ac
– 136 lbs total N at ~4.0% N
• 2006
– 2000 lbs dry matter / Ac
– 80 lbs total N at ~ 4.0% N
• 2005
– 3020 lbs dry matter / Ac
– 121 lbs total N at ~4.0% N
• 2004
– 2700 lbs dry matter / Ac
– 108 lbs total N at ~ 4.0% N
Field Pea Relay Cover Crop System Organic Matter and Nitrogen Yield – CREC Past Years
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2010 Field Pics – Oct. 7th
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QUESTIONS ? – COMMENTS !
• RESOURCES -
• NDSU Extension Service
• Blaine Schatz, Dir.–NDSU Carrington Res./Ext. Ctr.
• USDA – Agricultural Research Service – Mandan
• Natural Resources Conservation Service