Abstract
Abstract Studies in Ontario have shown that corn ( Zea mays L.) yields are reduced when corn is seeded immediately after rye ( Secale cereale L.) harvest or chemical kill of winter rye. A study was conducted in 1983 and 1984 on a Maryhill (Typic Hapludalf) loam soil to determine the effect of spring tillage systems and timing of rye chemical kill on the subsequent corn crop. The rye was seeded in early October after corn silage harvest. The tillage treatments consisted of (i) moldboard plow plus secondary tillage, (ii) strip tillage, (iii) notillage with ripple coulters (iv) no‐tillage with disc furrowers plus plow coulters, and (v) no‐tillage with ripple coulters plus plow coulters. The rye kill treatments were early (2 wk before planting) or late dust prior to corn planting). Corn whole‐plant yields averaged 13.6 and 12.4 Mg ha −1 for early and late rye kill, respectively. Corn yield in the moldboard plow treatment was higher than in strip tillage and the average of no‐till treatments; however, using disc furrowers produced yields equal to those with the moldboard plow treatment. Moving the residue out of the row with disc furrowers no‐till treatments with ripple coulters. The improvement in plant growth due to an early rye kill (as opposed to a late rye kill) was often greater with the conservation tillage systems relative to the moldboard plow treatment. A crop production system is proposed involving chemical control of a winter rye cover crop 2 wk before corn planting and planting the corn with a modified no‐till system that removes rye residue from the row area.
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Claims 6
Claim · model-written summary
Corn whole-plant yield averaged 13.6 Mg ha −1 after early rye kill.
- Taxon
- Corn
Zea mays subsp. mayse0 - Treatment
- earlye0
- Interactor
- rye
Secale cerealee0weed - Outcome
- Corn whole‐plant yieldse0
- Direction
- higherinferrede0
- Value
- 13.6e0
- Comparator
- late rye kille0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn whole‐plant yields averaged 13.6 and 12.4 Mg ha −1 for early and late rye kill, respectively”
Claim · model-written summary
Corn whole-plant yield averaged 12.4 Mg ha −1 after late rye kill.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- late rye kille0
- Interactor
- ryeSecale cerealee0weed
- Outcome
- Corn whole‐plant yieldse0
- Direction
- lowerinferrede0
- Value
- 12.4 Mg ha −1e0
- Comparator
- earlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn whole‐plant yields averaged 13.6 and 12.4 Mg ha −1 for early and late rye kill, respectively”
Claim · model-written summary
Moldboard plowing gave higher corn yield than strip tillage and average no-till treatments.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- moldboard plow treatmente0
- Outcome
- Corn yielde0
- Direction
- highere0
- Comparator
- strip tillage and the average of no‐till treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn yield in the moldboard plow treatment was higher than in strip tillage and the average of no‐till treatments”
Claim · model-written summary
Disc furrowers produced yields equal to moldboard plowing.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- disc furrowerse0
- Outcome
- yieldse0
- Direction
- equale0
- Comparator
- moldboard plow treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“using disc furrowers produced yields equal to those with the moldboard plow treatment”
t0“Corn Response”
Claim · model-written summary
Early rye kill improved plant growth more under conservation tillage than moldboard plowing.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- early rye kille0
- Interactor
- ryeSecale cerealee0weed
- Outcome
- plant growthe0
- Direction
- improvemente0
- Qualifier
- often greater with the conservation tillage systems relative to the moldboard plow treatmente0
- Comparator
- late rye kille0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The improvement in plant growth due to an early rye kill (as opposed to a late rye kill) was often greater with the conservation tillage systems relative to the moldboard plow treatment”
t0“Corn Response”
Claim · model-written summary
The authors propose killing winter rye chemically two weeks before corn planting and using a modified no-till planter that clears residue from the row.
- Taxon
- cornZea mays subsp. mayse0
- Interactor
- winter ryeSecale cerealee0weed
- Outcome
- chemical control of a winter rye cover crop 2 wk before corn planting and planting the corn with a modified no‐till system that removes rye residue from the row areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A crop production system is proposed involving chemical control of a winter rye cover crop 2 wk before corn planting and planting the corn with a modified no‐till system that removes rye residue from the row area”
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