Abstract
A field trial was conducted at Crop Research Centre, G. B. Pant University of Agricultural and Technology, Pantnagar to evaluate the effect of different weed control methods on growth of weeds and growth and yield of unpud-dled rice and to determine correlation between growth of weeds and growth and yield of rice. Major weeds in the experimental field were Digitaria sanguinalis, Elusine indica, Cleome viscosa and Cyperus rotandus. Maximum reduction in density and dry matter of weeds and more grain yield of rice was found in the plots treated with propanil (3,4 dichloro propionanilide) followed by butachlor [N-(butoxymethyl-2-chloro-2’, 6’-diethylacetanilide]. Fluchloralin [N-(2-chloroethyl) -2, 6-dinitro-N-propyl-4-(trifluromethyl) aniline) and 2, 4-D (2, 4-dichlorophenoxyacetic acid) (sodium salt) did not reduce the weed density and dry weight considerably and thus gave significantly lower grain yield as compared to other treatments. When propanil and butachlor application was followed by one hand weeding, the grain yield was similar to that obtained from weed-free plots. Negative correlation was observed between weed dry weight and crop dry weight; leaf area index; number of panicles; number of fertlie grains/panicle; grain yield of rice and nitrogen uptake by rice.
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Claims 9
Claim · model-written summary
Propanil followed by butachlor gave the maximum reduction in weed density and dry matter in unpuddled rice.
- Taxon
- rice
Oryza sativae1 - Treatment
- propanil (3,4 dichloro propionanilide) followed by butachlore1
- Interactor
- weedse1weed
- Outcome
- density and dry matter of weedse1
- Direction
- reductione1
- Setting
- Pantnagare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field trial was conducted at Crop Research Centre, G. B. Pant University of Agricultural and Technology, Pantnagar”
e1“Maximum reduction in density and dry matter of weeds and more grain yield of rice was found in the plots treated with propanil (3,4 dichloro propionanilide) followed by butachlor”
Claim · model-written summary
Propanil followed by butachlor gave more grain yield of rice.
- Taxon
- riceOryza sativae1
- Treatment
- propanil (3,4 dichloro propionanilide) followed by butachlore1
- Outcome
- grain yield of ricee1
- Direction
- moree1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Maximum reduction in density and dry matter of weeds and more grain yield of rice was found in the plots treated with propanil (3,4 dichloro propionanilide) followed by butachlor”
Claim · model-written summary
Propanil and butachlor followed by one hand weeding gave grain yield similar to weed-free plots.
- Taxon
- riceOryza sativae1
- Treatment
- propanil and butachlor application was followed by one hand weedinge2
- Outcome
- grain yielde2
- Direction
- similare2
- Comparator
- weed-free plotse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Maximum reduction in density and dry matter of weeds and more grain yield of rice was found in the plots treated with propanil (3,4 dichloro propionanilide) followed by butachlor”
e2“When propanil and butachlor application was followed by one hand weeding, the grain yield was similar to that obtained from weed-free plots”
Claim · model-written summary
Weed dry weight was negatively correlated with crop dry weight, leaf area index and number of panicles in rice.
- Taxon
- riceOryza sativae3
- Interactor
- weede3weed
- Outcome
- crop dry weight; leaf area index; number of paniclese3
- Direction
- Negative correlatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Negative correlation was observed between weed dry weight and crop dry weight; leaf area index; number of panicles; number of fertlie grains/panicle; grain yield of rice and nitrogen uptake by rice”
Claim · model-written summary
Weed dry weight was negatively correlated with number of fertile grains per panicle, grain yield and nitrogen uptake in rice.
- Taxon
- riceOryza sativae3
- Interactor
- weede3weed
- Outcome
- number of fertlie grains/panicle; grain yield of rice and nitrogen uptake by ricee3
- Direction
- Negative correlatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Negative correlation was observed between weed dry weight and crop dry weight; leaf area index; number of panicles; number of fertlie grains/panicle; grain yield of rice and nitrogen uptake by rice”
Claim · model-written summary
Fluchloralin did not reduce weed density and dry weight considerably in rice.
- Taxon
- riceOryza sativae1
- Treatment
- Fluchloraline4
- Interactor
- weede4weed
- Outcome
- weed density and dry weighte4
- Direction
- did not reducee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Maximum reduction in density and dry matter of weeds and more grain yield of rice was found in the plots treated with propanil (3,4 dichloro propionanilide) followed by butachlor”
e4“Fluchloralin [N-(2-chloroethyl) -2, 6-dinitro-N-propyl-4-(trifluromethyl) aniline) and 2, 4-D (2, 4-dichlorophenoxyacetic acid) (sodium salt) did not reduce the weed density and dry weight considerably and thus gave significantly lower grain yield as compared to other treatments”
Claim · model-written summary
2, 4-D did not reduce weed density and dry weight considerably in rice.
- Taxon
- riceOryza sativae1
- Treatment
- 2, 4-De4
- Interactor
- weede4weed
- Outcome
- weed density and dry weighte4
- Direction
- did not reducee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Maximum reduction in density and dry matter of weeds and more grain yield of rice was found in the plots treated with propanil (3,4 dichloro propionanilide) followed by butachlor”
e4“Fluchloralin [N-(2-chloroethyl) -2, 6-dinitro-N-propyl-4-(trifluromethyl) aniline) and 2, 4-D (2, 4-dichlorophenoxyacetic acid) (sodium salt) did not reduce the weed density and dry weight considerably and thus gave significantly lower grain yield as compared to other treatments”
Claim · model-written summary
Fluchloralin gave significantly lower grain yield of rice than other treatments.
- Taxon
- riceOryza sativae1
- Treatment
- Fluchloraline4
- Outcome
- grain yielde4
- Direction
- significantly lowere4
- Comparator
- other treatmentse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Maximum reduction in density and dry matter of weeds and more grain yield of rice was found in the plots treated with propanil (3,4 dichloro propionanilide) followed by butachlor”
e4“Fluchloralin [N-(2-chloroethyl) -2, 6-dinitro-N-propyl-4-(trifluromethyl) aniline) and 2, 4-D (2, 4-dichlorophenoxyacetic acid) (sodium salt) did not reduce the weed density and dry weight considerably and thus gave significantly lower grain yield as compared to other treatments”
Claim · model-written summary
2, 4-D gave significantly lower grain yield of rice than other treatments.
- Taxon
- riceOryza sativae1
- Treatment
- 2, 4-De4
- Outcome
- grain yielde4
- Direction
- significantly lowere4
- Comparator
- other treatmentse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Maximum reduction in density and dry matter of weeds and more grain yield of rice was found in the plots treated with propanil (3,4 dichloro propionanilide) followed by butachlor”
e4“Fluchloralin [N-(2-chloroethyl) -2, 6-dinitro-N-propyl-4-(trifluromethyl) aniline) and 2, 4-D (2, 4-dichlorophenoxyacetic acid) (sodium salt) did not reduce the weed density and dry weight considerably and thus gave significantly lower grain yield as compared to other treatments”
The same questions in other papers
propanil · yield · Oryza sativa (rice)Results differ
28 papers in the same direction as this paper · 9 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- no effect
- no effect
36 papers more in this group
See all 40 papers →2,4-D · weed · Oryza sativa (rice)Results differ
1 paper in the same direction as this paper · 47 in the opposite direction
- positive
- positive
- positive
45 papers more in this group
See all 49 papers →butachlor · yield · Oryza sativa (rice)Results differ
81 papers in the same direction as this paper · 5 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- negative
86 papers more in this group
See all 90 papers →butachlor · weed · Oryza sativa (rice)Results differ
89 papers in the same direction as this paper · 4 in the opposite direction · 3 reporting no difference from an alternative
- negative
- no effect
- negative
93 papers more in this group
See all 97 papers →Fluchloralin · weed · Oryza sativa (rice)Positive and negative results
2 in the opposite direction
- positive
- positive
Fluchloralin · yield · Oryza sativa (rice)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
propanil · weed · Oryza sativa (rice)Positive and negative results
25 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
23 papers more in this group
See all 27 papers →2,4-D · yield · Oryza sativa (rice)Positive and negative results
9 papers in the same direction as this paper · 52 in the opposite direction
- positive
- positive
- positive
58 papers more in this group
See all 62 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.