Yield and bushel weight of corn grain as influenced by time of planting
1944
Dungan, G.H.
Yield and quality tests of short-, mid-, and full-season corn varieties planted at the three different dates in northern and central Illinois led to the following results: 1. An intermediate planting date proved best for short-season varieties in northern Illinois. 2. Early planting of full-season varieties gave best yields in both northern and central Illinois. In northern Illinois May 27 planting reduced the yield 2.2 bushels under May 11 planting, and June 7 planting reduced it 10.3 bushels. At Urbana in central Illinois May 21 planting reduced the yield 4.9 bushels under May 2 planting, and June 11 planting reduced it 22.3 bushels. 3. Quality of grain as measured by bushel weight and percentage of water-free shelled corn was reduced by delayed planting in all cases. In view of the detrimental influence of late planting on the yield and quality of the crop, it appears that the use of this method for the reduction of insect and disease damage should be adopted with some caution.
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