Abstract
Field experiments were conducted to evaluate competitive effects of johnsongrass and sicklepod on growth and yield of irrigated and nonirrigated soybeans. Johnsongrass reduced soybean growth early in the growing season. Sicklepod was competitive all season, but competitiveness was greatest during the soybean reproductive stage. Soybean yields were reduced 31% by sicklepod, 14% by johnsongrass, and 36% by both weeds growing together. Nonirrigated soybeans yielded less than irrigated, but percent yield reductions were similar. Johnsongrass dry matter production and seed yield were reduced more than sicklepod by soybean interference. Soybean and sicklepod interference reduced johnsongrass seed production 73 to 95%. Johnsongrass produced 245 to 1238 seeds per plant when interfering with soybeans and sicklepod. Sicklepod seeds per plant were reduced 6 to 31% by johnsongrass interference and 47 to 75% by soybeans and soybeans plus johnsongrass.
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Claims 12
Claim · model-written summary
Johnsongrass reduced soybean growth early in the growing season.
- Taxon
- soybean
Glycine maxe0 - Treatment
- Johnsongrasse0
- Interactor
- Johnsongrass
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Sorghum halepensee0weed - Outcome
- soybean growthe0
- Direction
- reducede0
- Qualifier
- early in the growing seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Johnsongrass reduced soybean growth early in the growing season”
Claim · model-written summary
Sicklepod was competitive all season, and its competitiveness was greatest during the soybean reproductive stage.
- Taxon
- soybeanGlycine maxe1
- Organ / stage
- soybean reproductive stagee1
- Interactor
- Sicklepode1weed
- Outcome
- competitivenesse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Sicklepod was competitive all season, but competitiveness was greatest during the soybean reproductive stage”
Claim · model-written summary
Sicklepod reduced soybean yields by 31%.
- Taxon
- soybeanGlycine maxe2
- Treatment
- sicklepode2
- Interactor
- sicklepode2weed
- Outcome
- Soybean yieldse2
- Direction
- reducede2
- Value
- 31%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Soybean yields were reduced 31% by sicklepod, 14% by johnsongrass, and 36% by both weeds growing together”
Claim · model-written summary
Johnsongrass reduced soybean yields by 14%.
- Taxon
- soybeanGlycine maxe2
- Treatment
- johnsongrasse2
- Interactor
- johnsongrassSorghum halepensee2weed
- Outcome
- Soybean yieldse2
- Direction
- reducede2
- Value
- 14%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Soybean yields were reduced 31% by sicklepod, 14% by johnsongrass, and 36% by both weeds growing together”
Claim · model-written summary
Sicklepod and johnsongrass growing together reduced soybean yields by 36%.
- Taxon
- soybeanGlycine maxe2
- Treatment
- both weeds growing togethere2
- Interactor
- sicklepode2weed
- Second interactor
- johnsongrassSorghum halepensee2weed
- Outcome
- Soybean yieldse2
- Direction
- reducede2
- Value
- 36%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Soybean yields were reduced 31% by sicklepod, 14% by johnsongrass, and 36% by both weeds growing together”
Claim · model-written summary
Nonirrigated soybeans yielded less than irrigated soybeans.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Nonirrigated soybeans yielded less than irrigated, but percent yield reductions were similar”
Claim · model-written summary
Percent yield reductions of nonirrigated soybeans were similar to those of irrigated soybeans.
- Taxon
- soybeansGlycine maxe3
- Treatment
- Nonirrigatede3
- Outcome
- percent yield reductionse3
- Direction
- similare3
- Comparator
- irrigatede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Nonirrigated soybeans yielded less than irrigated, but percent yield reductions were similar”
Claim · model-written summary
Soybean interference reduced johnsongrass dry matter production and seed yield more than sicklepod.
- Taxon
- soybeanGlycine maxe4
- Treatment
- soybean interferencee4
- Interactor
- JohnsongrassSorghum halepensee4weed
- Outcome
- Johnsongrass dry matter production and seed yielde4
- Direction
- reduced more thane4
- Comparator
- sicklepode4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Johnsongrass dry matter production and seed yield were reduced more than sicklepod by soybean interference”
Claim · model-written summary
Soybean and sicklepod interference reduced johnsongrass seed production by 73 to 95%.
- Taxon
- SoybeanGlycine maxe5
- Treatment
- Soybean and sicklepod interferencee5
- Interactor
- johnsongrassSorghum halepensee5weed
- Second interactor
- sicklepode5weed
- Outcome
- johnsongrass seed productione5
- Direction
- reducede5
- Value
- 73 to 95%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Soybean and sicklepod interference reduced johnsongrass seed production 73 to 95%”
Claim · model-written summary
Johnsongrass produced 245 to 1238 seeds per plant when interfering with soybeans and sicklepod.
- Taxon
- soybeansGlycine maxe6
- Treatment
- when interfering with soybeans and sicklepode6
- Interactor
- JohnsongrassSorghum halepensee6weed
- Outcome
- seeds per plante6
- Value
- 245 to 1238e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Johnsongrass produced 245 to 1238 seeds per plant when interfering with soybeans and sicklepod”
Claim · model-written summary
Sicklepod seeds per plant were reduced by 6 to 31% by johnsongrass interference.
- Taxon
- soybeansGlycine maxe7
- Treatment
- johnsongrass interferencee7
- Interactor
- Sicklepode7weed
- Second interactor
- johnsongrassSorghum halepensee7weed
- Outcome
- Sicklepod seeds per plante7
- Direction
- reducede7
- Value
- 6 to 31%e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Sicklepod seeds per plant were reduced 6 to 31% by johnsongrass interference and 47 to 75% by soybeans and soybeans plus johnsongrass”
Claim · model-written summary
Sicklepod seeds per plant were reduced by 47 to 75% by soybeans and by soybeans plus johnsongrass.
- Taxon
- soybeansGlycine maxe7
- Treatment
- soybeans and soybeans plus johnsongrasse7
- Interactor
- Sicklepode7weed
- Outcome
- Sicklepod seeds per plante7
- Direction
- reducede7
- Value
- 47 to 75%e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Sicklepod seeds per plant were reduced 6 to 31% by johnsongrass interference and 47 to 75% by soybeans and soybeans plus johnsongrass”
The same questions in other papers
Sorghum halepense · growth · Glycine max (soybean)Positive and negative results
1 in the opposite direction
- positive
Sorghum halepense · yield · Glycine max (soybean)Positive and negative results
5 in the opposite direction
- negative
- negative
- negative
2 papers more in this group
See all 6 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.