Abstract
Field studies were conducted in 1990 and 1991 to determine the effects of corn planting date and hairy vetch control method on the efficacy of fall-planted hairy vetch as a weedsuppressive cover crop for no-till corn. Glyphosate controlled hairy vetch when applied at the early bud growth stage (April), but hairy vetch residue provided no weed control compared to the weedy check. Mowing was not an effective means of suppressing hairy vetch at the early bud stage. Untreated hairy vetch reduced weed biomass 96% in 1990 and 58% in 1991 but reduced yield over 76% in April-planted corn. There was no competition of untreated hairy vetch with corn when corn planting was delayed until May or June (mid- or late-bloom growth stages of hairy vetch). Corn planted in May into untreated hairy vetch yielded similarly to corn planted in a no-cover weed-free check.
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Claims 8
Claim · model-written summary
Glyphosate controlled hairy vetch at early bud.
- Organ / stage
- early bud growth stagee0
- Treatment
- Glyphosatee0
- Interactor
- hairy vetch
Vicia villosae0weed - Outcome
- hairy vetche0
- Direction
- controllede0
Not reportedTaxonComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate controlled hairy vetch when applied at the early bud growth stage (April)”
Claim · model-written summary
Hairy vetch residue did not control weeds relative to the weedy check.
- Treatment
- hairy vetch residuee0
- Interactor
- hairy vetchVicia villosae0weed
- Outcome
- weed controle0
- Direction
- no weed controle0
- Comparator
- weedy checke0
Not reportedTaxon
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hairy vetch residue provided no weed control compared to the weedy check”
Claim · model-written summary
Mowing did not effectively suppress hairy vetch at early bud.
- Organ / stage
- early bud stagee0
- Treatment
- Mowinge0
- Interactor
- hairy vetchVicia villosae0weed
- Outcome
- suppressing hairy vetche0
- Direction
- not an effectivee0
Not reportedTaxonComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mowing was not an effective means of suppressing hairy vetch at the early bud stage.”
Claim · model-written summary
Untreated hairy vetch reduced weed biomass 96% in 1990.
- Treatment
- Untreated hairy vetche0
- Interactor
- hairy vetchVicia villosae0weed
- Outcome
- weed biomasse0
- Direction
- reducede0
- Value
- 96%e0
Not reportedTaxonComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Untreated hairy vetch reduced weed biomass 96% in 1990”
Claim · model-written summary
Untreated hairy vetch reduced weed biomass 58% in 1991.
- Treatment
- Untreated hairy vetche0
- Interactor
- hairy vetchVicia villosae0weed
- Outcome
- weed biomasse0
- Direction
- reducede0
- Value
- 58%e0
Not reportedTaxonComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Untreated hairy vetch reduced weed biomass 96% in 1990 and 58% in 1991”
Claim · model-written summary
Untreated vetch reduced April-planted corn yield over 76%.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Untreated hairy vetche0
- Interactor
- hairy vetchVicia villosae0weed
- Outcome
- yielde0
- Direction
- reducede0
- Value
- over 76%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Untreated hairy vetch reduced weed biomass 96% in 1990 and 58% in 1991 but reduced yield over 76% in April-planted corn.”
Claim · model-written summary
Untreated hairy vetch did not compete with corn planted in May or June.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- untreated hairy vetche0
- Interactor
- hairy vetchVicia villosae0weed
- Outcome
- no competitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no competition of untreated hairy vetch with corn when corn planting was delayed until May or June”
Claim · model-written summary
May-planted corn in untreated vetch yielded similarly to the no-cover weed-free check.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- untreated hairy vetche0
- Interactor
- hairy vetchVicia villosae0weed
- Outcome
- yielded similarlye0
- Direction
- similarlye0
- Comparator
- no-cover weed-free checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn planted in May into untreated hairy vetch yielded similarly to corn planted in a no-cover weed-free check.”
The same questions in other papers
Vicia villosa · weed · Zea mays (maize)Positive and negative results
11 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- positive
- positive
10 papers more in this group
See all 14 papers →Vicia villosa · yield · Zea mays (maize)Positive and negative results
8 papers in the same direction as this paper · 45 in the opposite direction
- positive
- positive
- negative
50 papers more in this group
See all 54 papers →glyphosate · Vicia villosa · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
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.