Abstract
ABSTRACT This study was conducted to determine how different rates of N fertilizer applied to the soil and the use of a rye ( Secale cereale L.) winter cover crop affect irrigated corn ( Zea mays L.) yield and grain protein content. The study consisted of four replications of seven fertilizer N treatments applied in a randomized manner. Plant available N and potentially mineralizable N in the soil were measured before the experiment was initiated. Grain yield and total N uptake was determined at harvest. A rye cover crop was planted postharvest. Statistical analyses were conducted to test the hypothesis and assist in developing experimental conclusions. It was concluded that the excess quantities of N fertilizer applied were not utilized to increase yield or grain protein content. The use of rye as a winter cover crop appeared to decrease grain yield one of two yr but had no significant effect on residual soil N content.
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Claims 3
Claim · model-written summary
Excess nitrogen fertilizer did not increase yield or grain protein content.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- excess quantities of N fertilizer appliede0
- Outcome
- yield or grain protein contente0
- Direction
- not utilized to increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the excess quantities of N fertilizer applied were not utilized to increase yield or grain protein content.”
t0“Corn”
Claim · model-written summary
Rye winter cover cropping appeared to reduce grain yield in one of two years.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- rye as a winter cover crope0
- Outcome
- grain yielde0
- Direction
- decreasee0
- Qualifier
- one of two yre0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rye as a winter cover crop appeared to decrease grain yield one of two yr”
t0“Corn”
Claim · model-written summary
Rye winter cover cropping had no significant effect on residual soil nitrogen.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- rye as a winter cover crope0
- Outcome
- residual soil N contente0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of rye as a winter cover crop appeared to decrease grain yield one of two yr but had no significant effect on residual soil N content.”
t0“Corn”
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