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Harpstead, D.D
Paul, L.E
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Authors
Hoeft, R.G
Ebelhar, S.A
Paul, L.E
Jones, M.E
Dysinger, K
Harpstead, D.D
Topics
Type
Oral
Year
1987
1997
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1. Effect of Ammonia Knife Spacing on Corn Yield

Experiments were conducted at DeKalb on a Drummer sicl, Dixon Springs on a Alford silt loam and Elwood on a Blaunt sicl to evaluate the effect of ammonia knife spacing at varying N rates and on different tillage systems on the yield of corn Nitrogen was awlied at 180 1bs N/acre at bath DeKalb and El& and at 210 lbs N/acre at Dixon Springs in the knife spacing by tillage study. In the rate by knife spacing by time of application study at DeKalb, the preplant nitrogen was placed under where the rows...

2. Performance of Early vs. Late Maturing Corn Hybrids in Michigan

The planting of fill-season, or late maturing hybrids in Michigan is encouraged by their tendency to produce higher yields. Full-season hybrids can take advantage of the entire growing season available at a particular location. Shorter season hybrids reach physiological maturity sooner and generally yield less. Recent experience with cool, wet springs resulting in delayed planting, and growing seasons that provided less growing degree days (GDD) than normal has caused corn producers to question the...