Abstract
The influence of common ragweed ( Ambrosia artemisiifolia L.) interference on soybean [ Glycine max (L.) Merr. ‘Ransom’] yield was studied in the field utilizing naturally occurring weed populations. The damage-threshold population for a full-season, in-row common ragweed infestation was four weeds/10 m of row, which resulted in an 8% yield loss. Soybeans kept weed-free for 2 weeks or longer after emergence in a dry year produced normal yields, but 4 weeks of weed-free maintenance was required when adequate moisture was available early in the growing season. Soybean yield was not reduced by a natural population of common ragweed if the period of interference was limited to 6 weeks or less after crop emergence. By 8 weeks after emergence, common ragweed height averaged 25 cm taller than soybeans, and the weed canopy intercepted 24% of the photosynthetically active radiation.
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Claims 6
Claim · model-written summary
Four in-row ragweed plants per 10 m caused 8% soybean yield loss.
- Taxon
- soybean
Glycine maxe1 - Material
- Ransome1
- Interactor
- common ragweed
Ambrosia artemisiifoliae0weed - Outcome
- yield losse0
- Direction
- losse0
- Value
- 8%e0
- Qualifier
- four weeds/10 m of rowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The damage-threshold population for a full-season, in-row common ragweed infestation was four weeds/10 m of row, which resulted in an 8% yield loss”
e1“soybean [ Glycine max (L.) Merr. ‘Ransom’]”
Claim · model-written summary
Two weeks of weed-free maintenance produced normal yield in a dry year.
- Taxon
- SoybeansGlycine maxe0
- Treatment
- weed-free for 2 weeks or longere0
- Interactor
- common ragweedAmbrosia artemisiifoliae1weed
- Outcome
- normal yieldse0
- Qualifier
- in a dry yeare0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans kept weed-free for 2 weeks or longer after emergence in a dry year produced normal yields”
e1“common ragweed ( Ambrosia artemisiifolia L.) interference”
Claim · model-written summary
Four weeks of weed-free maintenance were required with adequate early moisture.
- Taxon
- soybeanGlycine maxe1
- Outcome
- 4 weeks of weed-free maintenancee0
- Qualifier
- adequate moisture was available early in the growing seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“4 weeks of weed-free maintenance was required when adequate moisture was available early in the growing season”
e1“soybean [ Glycine max (L.) Merr. ‘Ransom’]”
Claim · model-written summary
Ragweed interference of six weeks or less did not reduce soybean yield.
- Taxon
- SoybeanGlycine maxe0
- Interactor
- common ragweedAmbrosia artemisiifoliae0weed
- Outcome
- Soybean yielde0
- Direction
- not reducede0
- Qualifier
- 6 weeks or less after crop emergencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean yield was not reduced by a natural population of common ragweed if the period of interference was limited to 6 weeks or less after crop emergence”
Claim · model-written summary
At eight weeks ragweed was 25 cm taller than soybeans.
- Taxon
- soybeansGlycine maxe0
- Interactor
- common ragweedAmbrosia artemisiifoliae0weed
- Outcome
- common ragweed heighte0
- Direction
- tallere0
- Value
- 25 cme0
- Qualifier
- 8 weeks after emergencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By 8 weeks after emergence, common ragweed height averaged 25 cm taller than soybeans”
Claim · model-written summary
The weed canopy intercepted 24% of photosynthetically active radiation.
- Taxon
- soybeanGlycine maxe1
- Interactor
- common ragweedAmbrosia artemisiifoliae2weed
- Outcome
- photosynthetically active radiatione0
- Value
- 24%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the weed canopy intercepted 24% of the photosynthetically active radiation”
e1“soybean [ Glycine max (L.) Merr. ‘Ransom’]”
e2“common ragweed ( Ambrosia artemisiifolia L.) interference”
The same questions in other papers
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