Abstract
A 2-yr field study was conducted from 2002 to 2003 on a Dundee silt loam soil at the Southern Weed Science Research Unit Farm, Stoneville, MS (33°26′N latitude), to examine the effects of hairy vetch cover crop (hairy vetch killed at corn planting [HV-K], hairy vetch killed in a 38-cm-wide band centered over the crop row at corn planting [HV-B], hairy vetch left alive [HV-L], and no hairy vetch [NHV]) and glyphosate postemergence (broadcast, banded, and no herbicide) application on weed control and yield in glyphosate-resistant corn. Two applications of glyphosate at 0.84 kg ae/ha were applied 3 and 5 wk after planting (WAP) corn. Hairy vetch dry biomass was higher in HV-L (4,420 kg/ha) and HV-B (4,180 kg/ha) than in HV-K (1,960 kg/ha) plots at 7 WAP. Hairy vetch reduced densities of pitted morningglory, prickly sida, and yellow nutsedge in HV-B and HV-L compared with NHV plots, but hairy vetch had no effect on densities of barnyardgrass, johnsongrass, and large crabgrass at 7 WAP regardless of desiccation. Total weed dry biomass at 7 WAP was lower in HV-B and HV-L than in HV-K and NHV plots. Corn yield was higher in HV-K (10,280 kg/ha) than in HV-B (9,440 kg/ha) and HV-L (9,100 kg/ha), and yields were similar between HV-K and NHV (9,960 kg/ha). Glyphosate applied broadcast resulted in the highest corn yield (11,300 kg/ha) compared with a banded application (10,160 kg/ha). These findings indicate that hairy vetch cover crop has the potential for reducing the density of certain weed species in glyphosate-resistant corn production systems; however, optimum weed control and higher yield were obtained when glyphosate was used.
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Claims 11
Claim · model-written summary
Hairy vetch dry biomass at 7 WAP was higher in HV-L (4,420 kg/ha) than in HV-K (1,960 kg/ha) plots.
- Taxon
- Hairy vetch
Vicia villosae0 - Treatment
- HV-Le0
- Outcome
- dry biomasse0
- Direction
- highere0
- Value
- 4,420 kg/hae0
- Qualifier
- 1,960 kg/hae0
- Comparator
- HV-Ke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hairy vetch dry biomass was higher in HV-L (4,420 kg/ha) and HV-B (4,180 kg/ha) than in HV-K (1,960 kg/ha) plots at 7 WAP”
Claim · model-written summary
Hairy vetch dry biomass at 7 WAP was higher in HV-B (4,180 kg/ha) than in HV-K (1,960 kg/ha) plots.
- Taxon
- Hairy vetchVicia villosae0
- Treatment
- HV-Be0
- Outcome
- dry biomasse0
- Direction
- highere0
- Value
- 4,180 kg/hae0
- Qualifier
- 1,960 kg/hae0
- Comparator
- HV-Ke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hairy vetch dry biomass was higher in HV-L (4,420 kg/ha) and HV-B (4,180 kg/ha) than in HV-K (1,960 kg/ha) plots at 7 WAP”
Claim · model-written summary
Hairy vetch reduced densities of pitted morningglory, prickly sida and yellow nutsedge in HV-B and HV-L compared with NHV plots.
Verbatim
e0“Hairy vetch reduced densities of pitted morningglory, prickly sida, and yellow nutsedge in HV-B and HV-L compared with NHV plots”
Claim · model-written summary
Hairy vetch had no effect on densities of barnyardgrass, johnsongrass and large crabgrass at 7 WAP regardless of desiccation.
- Taxon
- barnyardgrass, johnsongrass, and large crabgrasse0
- Treatment
- hairy vetche0
- Interactor
- barnyardgrass, johnsongrass, and large crabgrasse0weed
- Outcome
- densitiese0
- Direction
- no_changeinferrede0
Not reportedComparator
Verbatim
e0“hairy vetch had no effect on densities of barnyardgrass, johnsongrass, and large crabgrass at 7 WAP regardless of desiccation”
Claim · model-written summary
Total weed dry biomass at 7 WAP was lower in HV-B and HV-L than in HV-K and NHV plots.
Verbatim
e0“Total weed dry biomass at 7 WAP was lower in HV-B and HV-L than in HV-K and NHV plots”
Claim · model-written summary
Corn yield was higher in HV-K (10,280 kg/ha) than in HV-B (9,440 kg/ha).
- Taxon
- Corn
Zea mays subsp. mayse0 - Treatment
- HV-Ke0
- Outcome
- yielde0
- Direction
- highere0
- Value
- 10,280 kg/hae0
- Qualifier
- 9,440 kg/hae0
- Comparator
- HV-Be0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn yield was higher in HV-K (10,280 kg/ha) than in HV-B (9,440 kg/ha) and HV-L (9,100 kg/ha)”
Claim · model-written summary
Corn yield was higher in HV-K (10,280 kg/ha) than in HV-L (9,100 kg/ha).
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- HV-Ke0
- Outcome
- yielde0
- Direction
- highere0
- Value
- 10,280 kg/hae0
- Qualifier
- 9,100 kg/hae0
- Comparator
- HV-Le0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn yield was higher in HV-K (10,280 kg/ha) than in HV-B (9,440 kg/ha) and HV-L (9,100 kg/ha)”
Claim · model-written summary
Corn yields were similar between HV-K and NHV (9,960 kg/ha).
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- HV-Ke0
- Outcome
- yieldse0
- Direction
- no_changeinferrede0
- Value
- 9,960 kg/hae0
- Comparator
- NHVe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yields were similar between HV-K and NHV (9,960 kg/ha)”
t0“Corn”
Claim · model-written summary
Glyphosate applied broadcast gave the highest corn yield (11,300 kg/ha) compared with a banded application (10,160 kg/ha).
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Glyphosate applied broadcaste0
- Outcome
- corn yielde0
- Direction
- higheste0
- Value
- 11,300 kg/hae0
- Qualifier
- 10,160 kg/hae0
- Comparator
- a banded applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glyphosate applied broadcast resulted in the highest corn yield (11,300 kg/ha) compared with a banded application (10,160 kg/ha)”
Claim · model-written summary
Hairy vetch cover crop has potential for reducing the density of certain weed species in glyphosate-resistant corn production systems.
Verbatim
e0“hairy vetch cover crop has the potential for reducing the density of certain weed species in glyphosate-resistant corn production systems”
Claim · model-written summary
Optimum weed control and higher corn yield were obtained when glyphosate was used.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- optimum weed control and higher yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimum weed control and higher yield were obtained when glyphosate was used”
t0“Corn”
The same questions in other papers
glyphosate · yield · Zea mays (maize)Results differ
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- negative
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See all 77 papers →transplanting · yield · Zea mays (maize)Results differ
87 papers in the same direction as this paper · 35 in the opposite direction · 7 reporting no difference from an alternative
- no effect
- no effect
- no effect
126 papers more in this group
See all 130 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.