Abstract
A split-plot factorial experiment was conducted to examine effects of tillage and winter cover crops on sweet corn. Main plots received tillage or no tillage. Cover crops consisted of hairy vetch, winter rye, or a mix. Nitrogen treatments consisted of either adding or not adding NH 4 NO 3 at recommended rates. No significant effects of tillage on sweet corn yields were detected, although yields with tillage were slightly greater. Following rye winter cover crops, adding NH 4 NO 3 to corn significantly ( P ≤ 0.05) increased yields by 56% compared to treatments not receiving N. However, following vetch, corn yields obtained without N fertilization equaled those obtained with N fertilization following rye or vetch. It was concluded that 1) nontilled sweet corn was successful and 2) N 2 fixed by vetch was able to sustain sweet corn production completely and was equivalent to a minimum of 70 kg N/ha.
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Claims 5
Claim · model-written summary
Tillage did not significantly affect sweet corn yield.
Not reportedComparator
Verbatim
e0“No significant effects of tillage on sweet corn yields were detected”
Claim · model-written summary
After rye, nitrogen addition raised sweet corn yield by 56%.
Verbatim
e0“Following rye winter cover crops, adding NH 4 NO 3 to corn significantly ( P ≤ 0.05) increased yields by 56% compared to treatments not receiving N.”
t0“Sweet Corn”
Claim · model-written summary
After vetch, unfertilized corn yield equaled fertilized corn yield after rye or vetch.
Verbatim
e0“following vetch, corn yields obtained without N fertilization equaled those obtained with N fertilization following rye or vetch.”
t0“Sweet Corn”
Claim · model-written summary
The authors concluded no tillage can produce sweet corn successfully.
Verbatim
e0“nontilled sweet corn was successful”
Claim · model-written summary
Vetch fixed nitrogen was concluded to sustain sweet corn production and equal at least 70 kg N/ha.
Verbatim
e0“N 2 fixed by vetch was able to sustain sweet corn production completely and was equivalent to a minimum of 70 kg N/ha.”
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