Abstract
Abstract Corn ( Zea mays L.)–soybean [ Glycine max (L.) Merr.] is among the most typical crop rotations in the U.S. Corn Belt, and N is the most limiting nutrient for both crops. This study aims to assess the effects of N management for corn on the following soybean crop. Two corn–soybean rotation N fertilizer rate studies—a long‐term study (1983–2020, Case Study I) and a two‐season study (2019–2020, Case Study II)—were conducted in Kansas (United States). Case Study I focused on soybean seed yield as the response variable, whereas Case Study II included a detailed seasonal characterization of soil N, symbiotic N fixation (SNF), and plant N uptake for soybean considering N fertilizer rates on the previous corn crop. Apparent N budgets from corn (N fertilizer minus grain N removal) ranged from approximately −100 to approximately +50 kg N ha −1 , and soybean yields were slightly or not affected by corn N management. Case Study I showed that long‐term N budgets in corn crops did not affect the following soybean crop yields. In Case Study II, the previous corn N management produced negative or small N surplus that influenced neither soil residual N nor SNF, without compromising soybean productivity. Farmers applying close to economic optimum N rates on corn will likely not generate scenarios of N surplus to compromise SNF or soybean yields. Forthcoming research should further address how long‐term and large soil N mining or surplus in corn may enhance or inhibit N fixation for the next soybean crop.
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Claims 6
Claim · model-written summary
Apparent N budgets from corn ranged from approximately −100 to approximately +50 kg N ha−1.
- Outcome
- Apparent N budgets from corne2
- Value
- approximately −100 to approximately +50 kg N ha −1e2
- Setting
- Kansase7
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Corn ( Zea mays L.)”
e2“Apparent N budgets from corn (N fertilizer minus grain N removal) ranged from approximately −100 to approximately +50 kg N ha −1”
e7“were conducted in Kansas (United States)”
Claim · model-written summary
Soybean yields were slightly or not affected by corn N management.
- Taxon
- Glycine max
Glycine maxe0 - Treatment
- corn N managemente3
- Outcome
- soybean yieldse3
- Direction
- not affectede3
- Qualifier
- slightlye3
- Setting
- Kansase7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“[ Glycine max (L.) Merr.] is among the most typical crop rotations in the U.S. Corn Belt”
e3“soybean yields were slightly or not affected by corn N management”
e7“were conducted in Kansas (United States)”
Claim · model-written summary
Long-term N budgets in corn did not affect the following soybean crop yields in Kansas.
- Taxon
- Glycine maxGlycine maxe0
- Treatment
- N budgets in corn cropse4
- Outcome
- soybean crop yieldse4
- Direction
- did not affecte4
- Setting
- Kansase7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“[ Glycine max (L.) Merr.] is among the most typical crop rotations in the U.S. Corn Belt”
e4“Case Study I showed that long‐term N budgets in corn crops did not affect the following soybean crop yields”
e7“were conducted in Kansas (United States)”
Claim · model-written summary
Previous corn N management influenced neither soil residual N nor symbiotic N fixation in soybean.
- Taxon
- Glycine maxGlycine maxe0
- Treatment
- previous corn N managemente5
- Outcome
- soil residual N nor SNFe5
- Direction
- influenced neithere5
- Setting
- Kansase7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“[ Glycine max (L.) Merr.] is among the most typical crop rotations in the U.S. Corn Belt”
e5“the previous corn N management produced negative or small N surplus that influenced neither soil residual N nor SNF, without compromising soybean productivity”
e7“were conducted in Kansas (United States)”
Claim · model-written summary
Previous corn N management did not compromise soybean productivity.
- Taxon
- Glycine maxGlycine maxe0
- Treatment
- previous corn N managemente5
- Outcome
- soybean productivitye5
- Direction
- without compromisinge5
- Setting
- Kansase7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“[ Glycine max (L.) Merr.] is among the most typical crop rotations in the U.S. Corn Belt”
e5“the previous corn N management produced negative or small N surplus that influenced neither soil residual N nor SNF, without compromising soybean productivity”
e7“were conducted in Kansas (United States)”
Claim · model-written summary
Farmers applying close to economic optimum N rates on corn will likely not generate N surplus that compromises SNF or soybean yields.
- Taxon
- Glycine maxGlycine maxe0
- Treatment
- close to economic optimum N rates on corne6
- Outcome
- scenarios of N surplus to compromise SNF or soybean yieldse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“[ Glycine max (L.) Merr.] is among the most typical crop rotations in the U.S. Corn Belt”
e6“Farmers applying close to economic optimum N rates on corn will likely not generate scenarios of N surplus to compromise SNF or soybean yields”
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