study of including double crop sunflower(following … study to determine the impacts of including...
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Rotational Study to determine the
impacts of including double crop
sunflower(following winter wheat) in
a typical corn: wheat: double crop
soybean rotation.
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Project Objectives
1:Yield Comparison between double crop Sunflower and double crop Soybean
2:Soil Nematode Classification and Quantification
3:Fertility Analysis
4:Relative corn yields
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Soybean Sunflower
Rotational Study July 2011
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Rotational Study September 2011
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CORN SOYBEANS WINTER WHEAT WINTER CANOLA DC SOYBEANS DC SUNFLOWERS
Yield Goal/Acre 0 0 0 0 38.83 1740Market Value/Unit 0 0 0 0 12 0.3AMTA Payment/Acre(est) 0 0 0 0 0LDP Payments/Acre (est) 0 0 0 0 0
Gross Return/Acre 0 0 0 0 465.96 522
Material Costs/Acre ($)Seed 0 0 0 0 60 35Fertilizer 0 0 0 0 30 80Lime 0 0 0 0 0 0Herbicides 0 0 0 0 20 30Insecticides 0 0 0 0 5 5Fungicides 0 0 0 0 0 0Crop Insurance 0 0 0 0 0 0Land 0 0 0 0 0 0Margin over Material Costs 0 0 0 0 350.96 372
Yields of all crops except sunflower are in bushels/acre. Sunflower yield is in lbs/acre.
Relative yield and Economic Performance of DC Sunflower vs. DC Soybean
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Soybean Cyst Nematode Analysis
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Classification of Soil Nematodes
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Double Crop Pre‐emergence Fertility
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Corn Pre‐Plant Fertility
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Rotational Study Corn April 2012
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Sunflower to Corn Soybean to Corn
April 2012
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SUNFLOWER / SOYBEAN ROTATION STUDY NSA 2010 ‐ 2012CORN YIELD 2012
Trt Population Harvest Wt. lbs Water % Area ac. Test Wt Yld bu. (15.5)
SF 1 25,545 7370 24.3 0.772 52.3 152.72
SF 2 25,545 7725 24.9 0.771 51.9 159.01 155.86
SB 1 26,000 6850 22.9 0.845 54.3 132.08 18.37
SB 2 26,000 7100 23.8 0.800 53.60 142.91 137.49
Av.
Δ
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Discussion Points
• Record heat and drought in 2012 resulted in better corn yields following sunflower…deeper rooting characteristics of sunflowers positively impacted corn rooting?
• Increased residue retention on sunflower ground had a non significant impact on planter performance, frost response on corn was higher on sunflower ground..reflectance of early season sunshine resulting in cooler ground?
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Discussion Points cont/d
• Increased residue retention on sunflower ground due to one or a combination of:
• More open less humid sunflower canopy
• Harvesting height differences
• Residual N in bean stalks enhancing decomposition
Residue retention ++ for southern soils
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ConclusionSunflower is an economically and
rotationally viable double crop option in Kentucky soft red winter wheat
rotations
Thank you: [email protected]