Abstract
Cotton ( Gossypium hirsutum L.) grown at two locations in Alabama from 1966 to 1968 produced maximum yields when kept free of annual weeds for approximately 8 weeks after emergence. Weed control for longer periods failed to increase yields. When initial weed control measures were delayed until 6 to 7 weeks after emergence at one location and 4 to 5 weeks at the other location, cotton was not injured. Prolonged weed competition past the critical periods usually resulted in drastic cotton yield reductions. Plant height and stem diameter of cotton were reduced by some of the weed competition treatments.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Cotton yields were maximal with approximately eight weed-free weeks after emergence.
- Taxon
- Cotton
Gossypium hirsutume0 - Treatment
- kept free of annual weeds for approximately 8 weeks after emergencee0
- Interactor
- annual weedse0weed
- Outcome
- yieldse0
- Direction
- maximume0
- Setting
- Alabamae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton ( Gossypium hirsutum L.) grown at two locations in Alabama from 1966 to 1968 produced maximum yields when kept free of annual weeds for approximately 8 weeks after emergence.”
Claim · model-written summary
Longer weed control did not increase yield.
Not reportedTaxonComparator
Verbatim
e0“Weed control for longer periods failed to increase yields.”
Claim · model-written summary
Delaying weed control until six to seven weeks at one site did not injure cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- initial weed control measures were delayed until 6 to 7 weeks after emergencee0
- Outcome
- cotton was not injurede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When initial weed control measures were delayed until 6 to 7 weeks after emergence at one location and 4 to 5 weeks at the other location, cotton was not injured.”
Claim · model-written summary
Delaying weed control until four to five weeks at the other site did not injure cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 4 to 5 weeks at the other locatione0
- Outcome
- cotton was not injurede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When initial weed control measures were delayed until 6 to 7 weeks after emergence at one location and 4 to 5 weeks at the other location, cotton was not injured.”
Claim · model-written summary
Weed competition beyond critical periods drastically reduced cotton yield.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Prolonged weed competition past the critical periodse0
- Outcome
- cotton yielde0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prolonged weed competition past the critical periods usually resulted in drastic cotton yield reductions.”
Claim · model-written summary
Some weed-competition treatments reduced cotton height and stem diameter.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- some of the weed competition treatmentse0
- Outcome
- Plant height and stem diametere0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height and stem diameter of cotton were reduced by some of the weed competition treatments.”
The same questions in other papers
competition · yield · Gossypium hirsutum (cotton)Results differ
13 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- negative
12 papers more in this group
See all 16 papers →herbicide · yield · Gossypium hirsutum (cotton)Positive and negative results
58 papers in the same direction as this paper · 123 in the opposite direction
- positive
- positive
- positive
178 papers more in this group
See all 182 papers →competition · growth · Gossypium hirsutum (cotton)Results agree
8 papers in the same direction as this paper
- negative
- negative
- no effect
5 papers more in this group
See all 9 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.