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Project Details:
Corn Nitrogen Study
Study the effects of ammonium sulfate and ammonium sulfate-nitrate in corn nitrogen programs involving one nitrogen application. Conventional tillage corn, April/May planting date, 32,000 plants/A;
Design: Randomized complete block with three replications
Soil parameters: Capac loam, 2-2.5% O.M, pH 6.0-7.0, no recent liming history, previous crop corn, no history of manure or S fertilization in recent memory. (O.M and pH values are just estimates, to be replaced with soil test values).
Treatments
- Ammonium Sulfate at 100 lbs. N/A pre-plant incorporated
- Ammonium Sulfate at 100 lbs. N/A side-dressed at 4 weeks after emergence/V4
- Ammonium Sulfate at 150 lbs. N/A pre-plant incorporated
- Ammonium Sulfate at 150 lbs. N/A side-dressed at 4 weeks after emergence/V4
- Ammonium Sulfate Nitrate at 100 lbs. N/A pre-plant incorporated
- Ammonium Sulfate Nitrate at 100 lbs. N/A side-dressed at 4 weeks after emergence/V4
- Ammonium Sulfate Nitrate at 150 lbs. N/A pre-plant incorporated
- Ammonium Sulfate Nitrate at 150 lbs. N/A side-dressed at 4 weeks after emergence/V4
- Urea at 100 lbs. N/A pre-plant incorporated
- Urea at 100 lbs. N/A side-dressed at 4 weeks after emergence/V4
- Urea at 150 lbs. N/A pre-plant incorporated
- Urea at 150 lbs. N/A side-dressed at 4 weeks after emergence/V4
- Control No N
Observations
- Final Population
- Early Season Plant Growth (height, extended leaf method V6)
- Pull V6 Plant Tissue Tests
- Chlorophyll/SPAD readings V6
- Photo observations of response early in season
- R1 Ear Leaf Plant Tissue N
- Grain Moisture
- Grain Test Weight
- Grain Yield
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