Abstract
Weed control by rye, crimson clover, subterranean clover, and hairy vetch cover crops was evaluated in no-tillage corn during 1992 and 1993 at two North Carolina locations. Weed biomass reduction was similar with rye, crimson clover, and subterranean clover treatments, ranging between 19 and 95% less biomass than a conventional tillage treatment without cover. Weed biomass reduction using hairy vetch or no cover in a notillage system was similar averaging between 0 and 49%, but less than other covers approximately 45 and 90 d after planting. Weed biomass was eliminated or nearly eliminated in all cover systems with PRE plus POST herbicide treatments. Weed species present varied greatly between years and locations, but were predominantly common lambsquarters, smooth pigweed, redroot pigweed, and broadleaf signalgrass. Corn grain yield was greatest using PRE herbicides or PRE plus POST herbicides, averaging between 16 to 100% greater than the nontreated control across all cover treatments depending on the year and location.
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Claims 8
Claim · model-written summary
Rye cover reduced weed biomass by 19–95% relative to conventional tillage without cover.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- ryee0
- Interactor
- Weede0weed
- Outcome
- Weed biomasse0
- Direction
- lesse0
- Value
- 19 and 95%e0
- Comparator
- conventional tillage treatment without covere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed biomass reduction was similar with rye, crimson clover, and subterranean clover treatments, ranging between 19 and 95% less biomass than a conventional tillage treatment without cover.”
t0“corn”
Claim · model-written summary
Crimson clover cover reduced weed biomass by 19–95% relative to conventional tillage without cover.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- crimson clovere0
- Interactor
- Weede0weed
- Outcome
- Weed biomasse0
- Direction
- lesse0
- Value
- 19 and 95%e0
- Comparator
- conventional tillage treatment without covere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed biomass reduction was similar with rye, crimson clover, and subterranean clover treatments, ranging between 19 and 95% less biomass than a conventional tillage treatment without cover.”
t0“corn”
Claim · model-written summary
Subterranean clover cover reduced weed biomass by 19–95% relative to conventional tillage without cover.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- subterranean clovere0
- Interactor
- Weede0weed
- Outcome
- Weed biomasse0
- Direction
- lesse0
- Value
- 19 and 95%e0
- Comparator
- conventional tillage treatment without covere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed biomass reduction was similar with rye, crimson clover, and subterranean clover treatments, ranging between 19 and 95% less biomass than a conventional tillage treatment without cover.”
t0“corn”
Claim · model-written summary
Hairy vetch suppressed weed biomass by 0–49%, less than the other covers at roughly 45 and 90 days.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- hairy vetche0
- Interactor
- Weede0weed
- Outcome
- Weed biomass reductione0
- Direction
- lesse0
- Value
- 0 and 49%e0
- Comparator
- other coverse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed biomass reduction using hairy vetch or no cover in a notillage system was similar averaging between 0 and 49%, but less than other covers approximately 45 and 90 d after planting.”
t0“corn”
Claim · model-written summary
PRE plus POST herbicides nearly or completely eliminated weed biomass in all cover systems.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- PRE plus POST herbicide treatmentse0
- Interactor
- Weede0weed
- Outcome
- Weed biomasse0
- Direction
- eliminated or nearly eliminatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed biomass was eliminated or nearly eliminated in all cover systems with PRE plus POST herbicide treatments.”
t0“corn”
Claim · model-written summary
Weed species differed greatly among years and locations, with four species predominant.
- Taxon
- cornZea mays subsp. mayst0
- Interactor
- Weede0weed
- Outcome
- Weed species presente0
- Qualifier
- common lambsquarters, smooth pigweed, redroot pigweed, and broadleaf signalgrasse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed species present varied greatly between years and locations, but were predominantly common lambsquarters, smooth pigweed, redroot pigweed, and broadleaf signalgrass.”
t0“corn”
Claim · model-written summary
PRE herbicides gave the greatest corn grain yield, 16–100% above untreated control across cover treatments.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- PRE herbicidese0
- Outcome
- Corn grain yielde0
- Direction
- greateste0
- Value
- 16 to 100%e0
- Comparator
- nontreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn grain yield was greatest using PRE herbicides or PRE plus POST herbicides, averaging between 16 to 100% greater than the nontreated control across all cover treatments depending on the year and location.”
Claim · model-written summary
PRE plus POST herbicides gave the greatest corn grain yield, 16–100% above untreated control across cover treatments.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- PRE plus POST herbicidese0
- Outcome
- Corn grain yielde0
- Direction
- greateste0
- Value
- 16 to 100%e0
- Comparator
- nontreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn grain yield was greatest using PRE herbicides or PRE plus POST herbicides, averaging between 16 to 100% greater than the nontreated control across all cover treatments depending on the year and location.”
The same questions in other papers
herbicide · weed · Zea mays (maize)Positive and negative results
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- no effect
- positive
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See all 406 papers →herbicide · yield · Zea mays (maize)Positive and negative results
499 papers in the same direction as this paper · 127 in the opposite direction · 24 reporting no difference from an alternative
- negative
- no effect
- no effect
647 papers more in this group
See all 651 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.