Abstract
Delaying nitrogen (N) fertilization until mid-season may increase nitrogen use efficiency (NUE), and can assist in determination of fertilizer N needed to achieve maximum grain yields based on the crop's yield potential. Previous research showed that corn yield potential can be accurately estimated mid-season using optical sensor measurements at V8. This study was conducted to determine if N fertilization can be delayed until mid-season without decreasing yields. Several combinations of preplant and sidedress N fertilizer applications at various growth stages were evaluated. Higher corn grain yields and NUE's were achieved with preplant N followed by mid-season sidedress at V6-V10 growth stages. Grain yields were decreased when no preplant N was applied and sidedress N was delayed until tasseling. Results suggest that preplant N followed by mid-season sidedress N application at or before V10 is recommended for corn giving a window of opportunity for N fertilization of 15 to 20 days.
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Claims 3
Claim · model-written summary
Preplant N followed by mid-season sidedress at V6-V10 gave higher corn grain yields and NUE.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- preplant N followed by mid-season sidedress at V6-V10 growth stagese1
- Outcome
- grain yields and NUE'se1
- Direction
- Highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Higher corn grain yields and NUE's were achieved with preplant N followed by mid-season sidedress at V6-V10 growth stages”
Claim · model-written summary
Delaying sidedress N until tasseling without preplant N decreased corn grain yields.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- no preplant N was applied and sidedress N was delayed until tasselinge2
- Outcome
- Grain yieldse2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of Delayed Nitrogen Fertilization on Corn Grain Yields”
e2“Grain yields were decreased when no preplant N was applied and sidedress N was delayed until tasseling”
Claim · model-written summary
Preplant N followed by mid-season sidedress N at or before V10 is recommended for corn, giving a 15 to 20 day window of opportunity for N fertilization.
- Taxon
- cornZea mays subsp. mayse3
- Treatment
- preplant N followed by mid-season sidedress N application at or before V10e3
- Outcome
- window of opportunity for N fertilizatione3
- Value
- 15 to 20 dayse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“preplant N followed by mid-season sidedress N application at or before V10 is recommended for corn giving a window of opportunity for N fertilization of 15 to 20 days”
The same questions in other papers
stage · nutrient: efficiency · Zea mays (maize)Results agree
4 papers in the same direction as this paper
- positive
- positive
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1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.