Abstract
Abstract In field experiments conducted at the Nyankpala Agricultural Station, Ghana, during 1976–77, soil moisture conditions appeared to be the deciding factor in determining the frequency of handweeding needed to obtain maximum seed cotton yields. In 1976, when planting was early and the late, heavy rains in October prolonged weed growth, two handweedings at 4 and 8 weeks after seeding (w.a.s.) gave comparable yields to continuous weeding and significantly better yields than an alachlor + fluometuron herbicide mixture. Supplementary weeding did not enhance the mixture's performance. In 1977, planting was relatively late and in the peak of the rainy season and so late weed growth was reduced. A single handweeding at 4 w.a.s. gave as good a yield as repeated handweeding treatments under these conditions. The alachlor + fluometuron mixture also gave adequate weed control and again supplementary weeding did not improve it significantly. In herbicide evaluation experiments, the safety and performance of pendimethalin and dinitramine herbicides were much influenced by the rainfall pattern immediately following application. With a relatively drier period following application in 1976, the higher rate of these herbicides depressed yields. This rate produced optimum yields in 1977, however, when a very wet period followed application. Prodiamine and the alachlor + fluometuron mixture were the herbicides least affected by soil moisture and they consistently produced good yields.
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Claims 15
Claim · model-written summary
Soil moisture appeared to determine the handweeding frequency required for maximum seed cotton yields.
- Taxon
- cotton
Gossypium hirsutume0 - Outcome
- frequency of handweeding needed to obtain maximum seed cotton yieldse0
- Setting
- soil moisture conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil moisture conditions appeared to be the deciding factor in determining the frequency of handweeding needed to obtain maximum seed cotton yields.”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
In 1976, two handweedings produced yields comparable to continuous weeding.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- two handweedings at 4 and 8 weeks after seeding (w.a.s.)e0
- Outcome
- yieldse0
- Direction
- comparablee0
- Comparator
- continuous weedinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1976, when planting was early and the late, heavy rains in October prolonged weed growth, two handweedings at 4 and 8 weeks after seeding (w.a.s.) gave comparable yields to continuous weeding”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
In 1976, two handweedings gave significantly better yields than alachlor plus fluometuron.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- two handweedings at 4 and 8 weeks after seeding (w.a.s.)e0
- Outcome
- yieldse0
- Direction
- bettere0
- Comparator
- alachlor + fluometuron herbicide mixturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two handweedings at 4 and 8 weeks after seeding (w.a.s.) gave comparable yields to continuous weeding and significantly better yields than an alachlor + fluometuron herbicide mixture.”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
Supplementary weeding did not enhance alachlor plus fluometuron performance in 1976.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Supplementary weedinge0
- Outcome
- performancee0
- Direction
- did not enhancee0
- Comparator
- mixturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplementary weeding did not enhance the mixture's performance.”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
In 1977, one handweeding at four weeks produced yields as good as repeated handweeding.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- single handweeding at 4 w.a.s.e0
- Outcome
- yielde0
- Direction
- as goode0
- Comparator
- repeated handweeding treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A single handweeding at 4 w.a.s. gave as good a yield as repeated handweeding treatments under these conditions.”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
Alachlor plus fluometuron provided adequate weed control in 1977.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- alachlor + fluometuron mixturee0
- Outcome
- weed controle0
- Direction
- adequatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The alachlor + fluometuron mixture also gave adequate weed control”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
Supplementary weeding did not significantly improve alachlor plus fluometuron weed control in 1977.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- supplementary weedinge0
- Outcome
- improve ite0
- Direction
- did not improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supplementary weeding did not improve it significantly.”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
Rainfall immediately after application influenced pendimethalin safety and performance.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- pendimethaline0
- Outcome
- safety and performancee0
- Direction
- influencede0
- Setting
- rainfall pattern immediately following applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the safety and performance of pendimethalin and dinitramine herbicides were much influenced by the rainfall pattern immediately following application.”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
Rainfall immediately after application influenced dinitramine safety and performance.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- dinitraminee0
- Outcome
- safety and performancee0
- Direction
- influencede0
- Setting
- rainfall pattern immediately following applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the safety and performance of pendimethalin and dinitramine herbicides were much influenced by the rainfall pattern immediately following application.”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
Higher pendimethalin rates depressed cotton yields in the drier 1976 conditions.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- pendimethaline1
- Outcome
- yieldse0
- Direction
- depressede0
- Qualifier
- relatively drier periode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With a relatively drier period following application in 1976, the higher rate of these herbicides depressed yields.”
e1“pendimethalin and dinitramine herbicides were much influenced”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
Higher dinitramine rates depressed cotton yields in the drier 1976 conditions.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- dinitraminee1
- Outcome
- yieldse0
- Direction
- depressede0
- Qualifier
- relatively drier periode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With a relatively drier period following application in 1976, the higher rate of these herbicides depressed yields.”
e1“pendimethalin and dinitramine herbicides were much influenced”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
Higher pendimethalin rates produced optimum cotton yields in wet 1977 conditions.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- pendimethaline1
- Outcome
- yieldse0
- Direction
- optimume0
- Qualifier
- very wet periode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This rate produced optimum yields in 1977, however, when a very wet period followed application.”
e1“pendimethalin and dinitramine herbicides were much influenced”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
Higher dinitramine rates produced optimum cotton yields in wet 1977 conditions.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- dinitraminee1
- Outcome
- yieldse0
- Direction
- optimume0
- Qualifier
- very wet periode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This rate produced optimum yields in 1977, however, when a very wet period followed application.”
e1“pendimethalin and dinitramine herbicides were much influenced”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
Prodiamine was among herbicides least affected by soil moisture and consistently yielded well.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Prodiaminee0
- Outcome
- good yieldse0
- Direction
- goode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prodiamine and the alachlor + fluometuron mixture were the herbicides least affected by soil moisture and they consistently produced good yields.”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
Claim · model-written summary
Alachlor plus fluometuron was among herbicides least affected by soil moisture and consistently yielded well.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- alachlor + fluometuron mixturee0
- Outcome
- good yieldse0
- Direction
- goode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prodiamine and the alachlor + fluometuron mixture were the herbicides least affected by soil moisture and they consistently produced good yields.”
t0“Weed Control in Rainfed Cotton in Northern Ghana”
The same questions in other papers
pendimethalin · yield · Gossypium hirsutum (cotton)Results differ
42 papers in the same direction as this paper · 4 in the opposite direction · 2 reporting no difference from an alternative
- negative
- no effect
- no effect
45 papers more in this group
See all 49 papers →Dinitramine · yield · Gossypium hirsutum (cotton)Positive and negative results
1 in the opposite direction
- negative
alachlor · weed · Gossypium hirsutum (cotton)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
1 paper more in this group
See all 5 papers →fluometuron · weed · Gossypium hirsutum (cotton)Positive and negative results
13 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
11 papers more in this group
See all 15 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.