Lynn Lagerstedt

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Lynn Lagerstedt
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The High Cost of Crop Production

• Agronomics
• - Economics
• Convenience

Do we need to change our priorities?
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The High Price of Fertilizer
Current Prices- November 23, 2007 (From one
source)
Anhydrous Ammonia 600.00/ton
0.366/lb N
0-0-60 - 307.00/ton 0.256/lb
K2O
18-46-0 - 507.00/ton 0.40/lb P2O5
10-34-0 Liquid Starter 2.15/gallon
Urea and Nitrogen Solutions projected to be
about 0.52/ lb Nitrogen
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Starter Fertilizer
Are they Similar?
Will the Results be the same?
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Goodhue County K Plots 1997 K soil
test preplant 65 ppm Joy silt loam Planted
4/28/97 30,000 seeds/A 3 reps Tim Wagar,
Area Extension Educator Rate
Yield bu/A Check _ 0 lbs K20/A 136.5 a Brdcst
_ 105 lbs K20/A 157.7 b Starter _ 42 lbs
K20/A 180.3 c (100 lbs/A, 5-14-42) LSD
(0.10) 11.02 CV- 4.0
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Weed control may never be easier than it is now.
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Glyphosate - Inexpensive -
Convenient - Spray Corn. Move to soybeans
and back to corn. - Controls all weeds.
Controls all weeds?
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Glyphosate Needs Help
- Difficult to control weeds - Dandelion
- Weeds that are potentially resistant to
Glyphosate.
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Important considerations that need to
receive more attention
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Objective- Uniformity. One plant should look
like another across the entire field.
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Uniform Emergence
- Firm soils at planting - Depth of planting -
Soil to seed contact - Residue management -
Tillage in same direction as planting - Be
prepared to assist Emergence
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Nitrogen Normal Minus 50
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The higher nitrogen rate was usually
profitable when yields were higher than 200
bu/acre.
Greater yield differences were observed when
nitrogen was applied as UAN compared with
trials where it was applied as anhydrous ammonia.
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Nitrogen Fall N vs. Spring N
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Nitrogen Spring NH vs. Spring UAN
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Nitrogen Manure Plus 50
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Fungicides on Soybeans
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Headline on Soybeans - 2006
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Fungicides on Corn
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Headline on Corn - 2006
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Deep Tillage Trial Summary Burns Fuel but Seldom
Increases Yield
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