Abstract
The objective of the study was to determine whether tillage and residue practices have a significant effect on the yield and N content of corn ( Zea mays L.) under nonlimiting soil N conditions. Nitrate leaching has been identified as a source of non‐point‐source pollution. By identifying tillage practices which maximize corn N uptake, recommendations can be based on how to minimize N loss. A 2‐year field study was conducted in southwestern Quebec on a 2.4‐ha site of a Typic Endoaquent (Humic Gleysol) cropped to corn. Three types of tillage practice (conventional tillage, reduced tillage, and no‐till) were combined with two residue levels (with and without) in a randomized complete block design. The effect of these practices on corn yield and corn N were studied. Seedling emergence rates in spring, and corn moisture content at harvest, were also monitored. Residues hindered initial plant emergence in the no‐till plots. Corn N and moisture contents in 1996 and 1997 indicated that no‐till with residue had a delayed maturity relative to the other treatments. However, total corn biomass and grain yields were not affected by tillage or residue treatments. No correlation between corn yield and corn N content was found.
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Claims 5
Claim · model-written summary
Residues hindered initial emergence under no-till.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- Residuese0
- Outcome
- initial plant emergencee0
- Direction
- hinderede0
- Qualifier
- no‐till plotse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Residues hindered initial plant emergence in the no‐till plots”
t0“Corn”
Claim · model-written summary
No-till with residue delayed corn maturity relative to other treatments.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- no‐till with residuee0
- Outcome
- maturitye0
- Direction
- delayede0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no‐till with residue had a delayed maturity relative to the other treatments”
t0“Corn”
Claim · model-written summary
Tillage and residue did not affect total corn biomass.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- tillage or residue treatmentse0
- Outcome
- total corn biomasse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total corn biomass and grain yields were not affected by tillage or residue treatments”
Claim · model-written summary
Tillage and residue did not affect grain yields.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- tillage or residue treatmentse0
- Outcome
- grain yieldse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total corn biomass and grain yields were not affected by tillage or residue treatments”
Claim · model-written summary
Corn yield and nitrogen content were uncorrelated.
- Taxon
- cornZea mays subsp. mayse0
- Compound
- corn N contente0
- Outcome
- corn yielde0
- Direction
- No correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No correlation between corn yield and corn N content was found”
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