Abstract
Abstract Studying the effects of continuous corn ( Zea mays L.) stover removal on its productivity across management systems is key to understanding how crops respond to varying climatic conditions. In the context of increasing climate variability, studying corn yield stability can serve as an indicator of resilience to changing climate. The objectives of this study were to (i) evaluate yield stability under varying levels of stover harvest and (ii) determine the effects of thermal time and precipitation on yield stability in continuous corn systems. A long‐term experiment in a continuous corn system with different levels of stover harvest (0%, ∼50%, and ∼90% of aboveground residue), tillage systems, and biochar rates was carried out. Corn yield and yield stability were evaluated. Multiple regression models were developed to determine which factors best explained treatment differences. Both corn yield and yield stability were highest with 50%–90% stover harvest. Yields increased 6%–15% when stover was harvested. High rates of biochar offset the negative impacts of stover retention on yield stability. Tillage did not affect yield stability, but yields were greater under chisel plow than no‐tillage. Precipitation explained 43%–49% of yield variability in all treatments. Conversely, thermal time and yield were only correlated in treatments without residue removal. Our results show that yield stability in continuous corn systems is more heavily influenced by stover harvest than biochar application or tillage. Thus, despite other potential environmental drawbacks of continuous corn systems, incorporating stover harvest may improve resilience to projected weather fluctuations.
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Claims 9
Claim · model-written summary
Corn yield and yield stability were highest with 50%–90% stover harvest.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- 50%–90% stover harveste0
- Outcome
- corn yield and yield stabilitye0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both corn yield and yield stability were highest with 50%–90% stover harvest.”
t0“corn”
Claim · model-written summary
Stover harvest increased corn yield by 6%–15%.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- stover was harvestede0
- Outcome
- Yieldse0
- Direction
- increasede0
- Value
- 6%–15%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields increased 6%–15% when stover was harvested.”
t0“corn”
Claim · model-written summary
High biochar rates offset the negative effect of stover retention on corn yield stability.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- High rates of biochare0
- Outcome
- yield stabilitye0
- Direction
- offsete0
- Qualifier
- stover retentione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High rates of biochar offset the negative impacts of stover retention on yield stability.”
t0“corn”
Claim · model-written summary
Tillage did not affect corn yield stability.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- Tillagee0
- Outcome
- yield stabilitye0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillage did not affect yield stability”
t0“corn”
Claim · model-written summary
Corn yields were greater with chisel plow than no-tillage.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- chisel plowe0
- Outcome
- yieldse0
- Direction
- greatere0
- Comparator
- no‐tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yields were greater under chisel plow than no‐tillage”
t0“corn”
Claim · model-written summary
Precipitation explained 43%–49% of corn yield variability across treatments.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- Precipitatione0
- Outcome
- yield variabilitye0
- Value
- 43%–49%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Precipitation explained 43%–49% of yield variability in all treatments.”
t0“corn”
Claim · model-written summary
Thermal time and corn yield were correlated only without residue removal.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- thermal timee0
- Outcome
- yielde0
- Qualifier
- treatments without residue removale0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thermal time and yield were only correlated in treatments without residue removal.”
t0“corn”
Claim · model-written summary
Stover harvest influenced corn yield stability more strongly than biochar or tillage.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- stover harveste0
- Outcome
- yield stabilitye0
- Direction
- more heavily influencede0
- Comparator
- biochar application or tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield stability in continuous corn systems is more heavily influenced by stover harvest than biochar application or tillage.”
Claim · model-written summary
The authors suggest stover harvest may improve continuous corn resilience to weather fluctuations.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- incorporating stover harveste0
- Qualifier
- may improve resilience to projected weather fluctuationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“incorporating stover harvest may improve resilience to projected weather fluctuations.”
t0“corn”
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