Abstract
Cover crop residues are not widely used for weed control because, as a stand-alone tactic, they do not effectively suppress all weeds and their duration of weed control is too short. Field experiments were conducted in 1995 and 1996, under both irrigated and rainfed conditions, to quantify Amaranthus spp., Setaria spp., and soybean emergence and growth in residues of fall-planted, spring-killed barley, rye, triticale, wheat, and hairy vetch. For both weed species, seedling emergence was reduced 3 wk after soybean planting by rye and wheat residues (≥ 2, 170 kg ha −1 ) in 1996. In 1996, Amaranthus spp. canopy volume was reduced 38 to 71% by residues 3 wk after planting. Likewise, Setaria spp. canopy biomass was reduced 37 to 97% in residues 5 wk after planting over both years. The response comparison index was used to identify frequency by which weed growth was placed at a disadvantage relative to soybean growth. Amaranthus spp. and Setaria spp. growth suppressions 3 to 5 wk after planting indicate potential times for intervention with other integrated weed management tactics such as reduced postemergence herbicide rates and interrow cultivation.
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Claims 8
Claim · model-written summary
Rye residue reduced emergence of Amaranthus spp. seedlings three weeks after soybean planting in 1996.
- Taxon
- soybean
Glycine maxe1 - Treatment
- ryee0
- Interactor
- Amaranthus spp.
_with_green_foliage%2C_photographed_in_Tamil_Nadu%2C_India.jpg?width=60)
Amaranthuse1weed - Outcome
- seedling emergencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_with_green_foliage%2C_photographed_in_Tamil_Nadu%2C_India.jpg?width=500)
Verbatim
e0“For both weed species, seedling emergence was reduced 3 wk after soybean planting by rye and wheat residues (≥ 2, 170 kg ha −1 ) in 1996”
e1“Amaranthus spp., Setaria spp., and soybean emergence and growth”
Claim · model-written summary
Wheat residue reduced emergence of Amaranthus spp. seedlings three weeks after soybean planting in 1996.
- Taxon
- soybeanGlycine maxe1
- Treatment
- wheat residuese0
- Interactor
- Amaranthus spp.Amaranthuse1weed
- Outcome
- seedling emergencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both weed species, seedling emergence was reduced 3 wk after soybean planting by rye and wheat residues (≥ 2, 170 kg ha −1 ) in 1996”
e1“Amaranthus spp., Setaria spp., and soybean emergence and growth”
Claim · model-written summary
Rye residue reduced emergence of Setaria spp. seedlings three weeks after soybean planting in 1996.
- Taxon
- soybeanGlycine maxe1
- Treatment
- ryee0
- Interactor
- Setaria spp.e1weed
- Outcome
- seedling emergencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both weed species, seedling emergence was reduced 3 wk after soybean planting by rye and wheat residues (≥ 2, 170 kg ha −1 ) in 1996”
e1“Amaranthus spp., Setaria spp., and soybean emergence and growth”
Claim · model-written summary
Wheat residue reduced emergence of Setaria spp. seedlings three weeks after soybean planting in 1996.
- Taxon
- soybeanGlycine maxe1
- Treatment
- wheat residuese0
- Interactor
- Setaria spp.e1weed
- Outcome
- seedling emergencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both weed species, seedling emergence was reduced 3 wk after soybean planting by rye and wheat residues (≥ 2, 170 kg ha −1 ) in 1996”
e1“Amaranthus spp., Setaria spp., and soybean emergence and growth”
Claim · model-written summary
Cover crop residues reduced Amaranthus spp. canopy volume by 38 to 71% in 1996.
- Taxon
- soybeanGlycine maxe1
- Treatment
- residuese0
- Interactor
- Amaranthus spp.Amaranthuse0weed
- Outcome
- Amaranthus spp. canopy volumee0
- Direction
- reducede0
- Value
- 38 to 71%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1996, Amaranthus spp. canopy volume was reduced 38 to 71% by residues 3 wk after planting”
e1“soybean emergence and growth”
Claim · model-written summary
Cover crop residues reduced Setaria spp. canopy biomass by 37 to 97% over both years.
- Taxon
- soybeanGlycine maxe1
- Treatment
- residuese0
- Interactor
- Setaria spp.e0weed
- Outcome
- Setaria spp. canopy biomasse0
- Direction
- reducede0
- Value
- 37 to 97%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Setaria spp. canopy biomass was reduced 37 to 97% in residues 5 wk after planting over both years”
e1“soybean emergence and growth”
Claim · model-written summary
The response comparison index identified how often weed growth was disadvantaged relative to soybean growth.
- Taxon
- soybeanGlycine maxe0
- Outcome
- frequency by which weed growth was placed at a disadvantagee0
- Comparator
- soybean growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response comparison index was used to identify frequency by which weed growth was placed at a disadvantage relative to soybean growth”
Claim · model-written summary
The authors suggest intervention three to five weeks after planting with integrated weed-control tactics.
- Taxon
- soybeanGlycine maxe1
- Interactor
- Amaranthus spp.Amaranthuse0weed
- Outcome
- potential times for interventione0
- Qualifier
- 3 to 5 wk after plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amaranthus spp. and Setaria spp. growth suppressions 3 to 5 wk after planting indicate potential times for intervention with other integrated weed management tactics such as reduced postemergence herbicide rates and interrow cultivation”
e1“soybean emergence and growth”
The same questions in other papers
Triticum aestivum · growth · Glycine max (soybean)Positive and negative results
11 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- negative
- negative
12 papers more in this group
See all 16 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.