Abstract
A field experiment was conducted during 2004-05 and 2005-06 on clay-loam soil at Jabalpur in Madhya Pradesh to find out the effect of integrated weed-management practices on weeds and yield of zero-till direct- seeded rice (Oryza sativa L.). Different methods of crop establishment were evaluated for getting higher produc- tivity and profitability of irrigated rice-wheat cropping system. For rice there were four methods, viz. direct seeding by zero-till drill, direct drilling in friable soil by seed drill, direct seeding of sprouted seeds in puddled soil, and transplanting; and for the succeeding wheat (Triticum aestivum L. emend. Fiori & Paol.) there were two methods, viz. sowing with zero-till drill and conventional sowing. Echinochloa colona and Commelina spp. were the major weeds in zero-till, direct-seeded rice, which reduced the grain yield by 27.4%. Pre-emergence application of pretilachlor at 750 glha or pendimethalin at 1.0 kglha each, followed by one hand-weeding at 30 days after sow- ing was on a par with hand-weeding twice, giving significantly higher grain yield (5.20 and 3.50 tlha) compared with the weedy check (3.98 and 2.25 tlha). Zero-till, direct-seeded rice with proper weed management resulted in significantly higher yield than transplanted rice. In the succeeding wheat crop, population of dominant weeds, viz. Chenopodium album and Medicago hispida, was found to be reduced when wheat was grown after zero-till, direct-seeded rice compared with other methods of rice establishment. The wheat sown after zero-till, direct- seeded rice yielded significantly higher (3.76 and 3.61 tlha) than when sown after other methods of rice estab- lishment. Zero tillage in direct-seeded rice-wheat system reduced the weed problem and increased the system productivity as well as profitability.
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Claims 8
Claim · model-written summary
Major weeds in zero till direct seeded rice reduced grain yield by 27.4%.
- Taxon
- rice
Oryza sativae0 - Interactor
- Echinochloa colona
Echinochloa colonae0weed - Outcome
- grain yielde0
- Direction
- reducede0
- Value
- 27.4%e0
CommelinaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Echinochloa colona and Commelina spp. were the major weeds in zero-till, direct-seeded rice, which reduced the grain yield by 27.4%.”
Claim · model-written summary
Pretilachlor followed by hand weeding gave significantly higher rice grain yield than the weedy check.
- Taxon
- riceOryza sativat0
- Treatment
- pretilachlor at 750 glhae0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 5.20e0
- Comparator
- weedy checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pre-emergence application of pretilachlor at 750 glha or pendimethalin at 1.0 kglha each, followed by one hand-weeding at 30 days after sow- ing was on a par with hand-weeding twice, giving significantly higher grain yield (5.20 and 3.50 tlha) compared with the weedy check (3.98 and 2.25 tlha).”
t0“rice”
Claim · model-written summary
Pendimethalin followed by hand weeding gave significantly higher rice grain yield than the weedy check.
- Taxon
- riceOryza sativat0
- Treatment
- pendimethalin at 1.0 kglhae0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 3.50 tlhae0
- Comparator
- weedy checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pre-emergence application of pretilachlor at 750 glha or pendimethalin at 1.0 kglha each, followed by one hand-weeding at 30 days after sow- ing was on a par with hand-weeding twice, giving significantly higher grain yield (5.20 and 3.50 tlha) compared with the weedy check (3.98 and 2.25 tlha).”
t0“rice”
Claim · model-written summary
Managed zero till direct seeded rice outyielded transplanted rice.
- Taxon
- riceOryza sativae0
- Treatment
- Zero-till, direct-seeded rice with proper weed managemente0
- Outcome
- yielde0
- Direction
- highere0
- Comparator
- transplanted ricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zero-till, direct-seeded rice with proper weed management resulted in significantly higher yield than transplanted rice.”
Claim · model-written summary
Wheat following zero till direct seeded rice had reduced populations of dominant weeds.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- after zero-till, direct-seeded ricee0
- Interactor
- Chenopodium album
Chenopodium albume0weed - Second interactor
- Medicago hispidae0weed
- Outcome
- population of dominant weedse0
- Direction
- reducede0
- Comparator
- other methods of rice establishmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“population of dominant weeds, viz. Chenopodium album and Medicago hispida, was found to be reduced when wheat was grown after zero-till, direct-seeded rice compared with other methods of rice establishment.”
Claim · model-written summary
Wheat sown after zero till direct seeded rice had significantly higher yield.
- Taxon
- wheatTriticum aestivume0
- Treatment
- after zero-till, direct- seeded ricee0
- Outcome
- yieldede0
- Direction
- highere0
- Value
- 3.76 and 3.61 tlhae0
- Comparator
- other methods of rice estab- lishmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The wheat sown after zero-till, direct- seeded rice yielded significantly higher (3.76 and 3.61 tlha) than when sown after other methods of rice estab- lishment.”
Claim · model-written summary
Zero tillage reduced weeds in the rice wheat system.
Not reportedComparator
Verbatim
e0“Zero tillage in direct-seeded rice-wheat system reduced the weed problem and increased the system productivity as well as profitability.”
Claim · model-written summary
Zero tillage increased rice wheat system productivity and profitability.
- Taxon
- rice-wheate0
- Treatment
- Zero tillagee0
- Outcome
- system productivity as well as profitabilitye0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Zero tillage in direct-seeded rice-wheat system reduced the weed problem and increased the system productivity as well as profitability.”
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See all 1,078 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.