Paper · 2008 · Indian Journal of Weed Science

Role of Variety and Plant Geometry on Weed Management in Transplanted Rice (Oryza sativa L.)

R. S. Ghuman; L. S. Brar; U. S. Walia

6
claims
12
verbatim quotes
10
citations
2
research areas
—
Not open access

Abstract

Field studies were conducted to evaluate the competing ability of weeds with different rice varieties in relation to variable plant populations. Rice variety PR 108 exhibited greater smothering effect on weeds but PR 118 obtained maximum grain yield as compared to PR 108, PR 114 and PR 116 grown under puddled transplanted conditions. The plant population of 50 plants/m2 was found to be significantly superiror to 33 and 25 plants/m2 as it recorded significantly less weed dry matter and highest grain yield compared to other population levels. Application of pretilachlor at 0.75 kg/ha as pre-emergence proved to be very effective in reducing weed dry matter and increasing grain yield upto a significant level as compared to unweeded check.

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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

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

PR 108 suppressed weeds more than the other tested varieties.

Material
PR 108e0
Interactor
weedse0weed
Outcome
smothering effect on weedse0
Direction
greatere0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Rice (Oryza sativa L.)”

✓ located verbatim in the source · title, characters 70–92 · show in text ↑
e0

“Rice variety PR 108 exhibited greater smothering effect on weeds”

✓ located verbatim in the source · abstract, characters 145–209 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

PR 118 yielded more grain than PR 108, PR 114, and PR 116.

Material
PR 118e0
Outcome
maximum grain yielde0
Direction
maximume0
Qualifier
puddled transplanted conditionse0
Comparator
PR 108, PR 114 and PR 116e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Rice (Oryza sativa L.)”

✓ located verbatim in the source · title, characters 70–92 · show in text ↑
e0

“PR 118 obtained maximum grain yield as compared to PR 108, PR 114 and PR 116 grown under puddled transplanted conditions.”

✓ located verbatim in the source · abstract, characters 214–335 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

A density of 50 plants/m2 reduced weed dry matter relative to 33 and 25 plants/m2.

Treatment
50 plants/m2e0
Interactor
weede0weed
Outcome
weed dry mattere0
Direction
lesse0
Comparator
33 and 25 plants/m2e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Rice (Oryza sativa L.)”

✓ located verbatim in the source · title, characters 70–92 · show in text ↑
e0

“The plant population of 50 plants/m2 was found to be significantly superiror to 33 and 25 plants/m2 as it recorded significantly less weed dry matter and highest grain yield compared to other population levels.”

✓ located verbatim in the source · abstract, characters 336–546 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

A density of 50 plants/m2 gave the highest grain yield relative to lower densities.

Treatment
50 plants/m2e0
Outcome
grain yielde0
Direction
higheste0
Comparator
33 and 25 plants/m2e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Rice (Oryza sativa L.)”

✓ located verbatim in the source · title, characters 70–92 · show in text ↑
e0

“The plant population of 50 plants/m2 was found to be significantly superiror to 33 and 25 plants/m2 as it recorded significantly less weed dry matter and highest grain yield compared to other population levels.”

✓ located verbatim in the source · abstract, characters 336–546 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Pre-emergence pretilachlor at 0.75 kg/ha significantly reduced weed dry matter versus an unweeded check.

Treatment
pretilachlor at 0.75 kg/ha as pre-emergencee0
Interactor
weede0weed
Outcome
weed dry mattere0
Direction
reducinge0
Comparator
unweeded checke0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Rice (Oryza sativa L.)”

✓ located verbatim in the source · title, characters 70–92 · show in text ↑
e0

“Application of pretilachlor at 0.75 kg/ha as pre-emergence proved to be very effective in reducing weed dry matter and increasing grain yield upto a significant level as compared to unweeded check.”

✓ located verbatim in the source · abstract, characters 547–744 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Pre-emergence pretilachlor at 0.75 kg/ha significantly increased grain yield versus an unweeded check.

Treatment
pretilachlor at 0.75 kg/ha as pre-emergencee0
Outcome
grain yielde0
Direction
increasinge0
Comparator
unweeded checke0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

t0

“Rice (Oryza sativa L.)”

✓ located verbatim in the source · title, characters 70–92 · show in text ↑
e0

“Application of pretilachlor at 0.75 kg/ha as pre-emergence proved to be very effective in reducing weed dry matter and increasing grain yield upto a significant level as compared to unweeded check.”

✓ located verbatim in the source · abstract, characters 547–744 · show in text ↑

Pretilachlor · yield · Oryza sativa (rice)Results differ

141 papers: 133 positive, 8 negative or no effect

132 papers in the same direction as this paper · 3 in the opposite direction · 5 reporting no difference from an alternative

  1. negative
  2. negative
  3. no effect

137 papers more in this group

See all 141 papers →

Pretilachlor · weed · Oryza sativa (rice)Results differ

150 papers: 147 positive, 3 negative or no effect

146 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
  2. negative
  3. no effect

146 papers more in this group

See all 150 papers →

herbicide · weed · Oryza sativa (rice)Positive and negative results

603 papers: 579 positive, 24 negative or no effect

578 papers in the same direction as this paper · 17 in the opposite direction · 7 reporting no difference from an alternative

  1. negative
  2. no effect
  3. negative

599 papers more in this group

See all 603 papers →

herbicide · yield · Oryza sativa (rice)Positive and negative results

802 papers: 725 positive, 77 negative or no effect

724 papers in the same direction as this paper · 57 in the opposite direction · 20 reporting no difference from an alternative

  1. no effect
  2. negative
  3. negative

798 papers more in this group

See all 802 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.