Abstract
Field experiments were conducted in wetlands of Tamil Nadu Agricultural University, Coimbatore during rabi, 2001-02 and summer, 2002 to study the effect of weed control treatments on nutrient uptake by crop and removal by weeds and their impact on yield. Pretilachlor at five levels (0.5, 0.75,1.0,1.5 and 3.0 kg ha-1) were compared with anilofos (0.4 kg ha-1), butachlor (1.25 kg ha-1) and pretilachlor (Rifit) (0.75 kg ha-1) as well as the farmers’ practice of two manual weeding and un weeded control. Nutrient uptake by crop and removal by weeds were recorded at active tillering, panicle initiation and at harvest stage. The results revealed that pretilachlor at 3.0 kg ha-1 resulted in reduced nutrient depletion by weeds and was comparable with pretilachlor at 1.0 kg ha-1. Pretilachlor at 1.0 kg ha-1 recorded maximum nutrient uptake by crop and remained comparable with pretilachlor at 0.75 kg ha-1 and hand weeding twice and thereby grain yield of rice.
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Claims 3
Claim · model-written summary
Pretilachlor at 3.0 kg ha-1 reduced nutrient depletion by weeds, comparable to 1.0 kg ha-1.
- Taxon
- rice
Oryza sativat0 - Treatment
- pretilachlor at 3.0 kg ha-1e0
- Interactor
- weedse0weed
- Outcome
- nutrient depletion by weedse0
- Direction
- reducede0
- Comparator
- pretilachlor at 1.0 kg ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“pretilachlor at 3.0 kg ha-1 resulted in reduced nutrient depletion by weeds and was comparable with pretilachlor at 1.0 kg ha-1.”
Claim · model-written summary
Pretilachlor at 1.0 kg ha-1 produced maximum crop nutrient uptake.
- Taxon
- riceOryza sativat0
- Treatment
- Pretilachlor at 1.0 kg ha-1e0
- Outcome
- nutrient uptake by crope0
- Direction
- maximume0
- Comparator
- pretilachlor at 0.75 kg ha-1 and hand weeding twicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Pretilachlor at 1.0 kg ha-1 recorded maximum nutrient uptake by crop and remained comparable with pretilachlor at 0.75 kg ha-1 and hand weeding twice and thereby grain yield of rice.”
Claim · model-written summary
Pretilachlor at 1.0 kg ha-1 gave comparable rice grain yield.
- Taxon
- riceOryza sativae0
- Treatment
- Pretilachlor at 1.0 kg ha-1e0
- Outcome
- grain yielde0
- Direction
- comparablee0
- Comparator
- pretilachlor at 0.75 kg ha-1 and hand weeding twicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pretilachlor at 1.0 kg ha-1 recorded maximum nutrient uptake by crop and remained comparable with pretilachlor at 0.75 kg ha-1 and hand weeding twice and thereby grain yield of rice.”
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