Abstract
A field experiment was conducted during rainy seasons of 2019 and 2020 to evaluate the impact of different tillage and herbicides on the nutrient removal by weeds and productivity of direct-seeded rice (DSR). The treatments consisted two tillage practices, viz. zero tillage (ZT) and conventional tillage (CT) in the main plot and six herbicide combinations [oxadiargyl followed by (fb) bispyribac-sodium, penoxsulam + cyhalofop-butyl, oxadiargyl fb penoxsulam + cyhalofopbutyl, fenoxaprop-p-ethyl + ethoxysulfuron, oxadiargyl fb fenoxaprop-p-ethyl + ethoxysulfuron and pendimethalin fb bispyribac-sodium] along with two control treatments (unweeded and weed free check) in the subplots of DSR. Total N, P and K removal by weed in unweeded control was 37.29, 47.12 and 35.86% higher under CT than under ZT. Oxadiargyl fb fenoxaprop-p-ethyl + ethoxysulfuron and oxadiargyl fb penoxsulam + cyhalofop-butyl registered the lowest total weed biomass, weed nutrient removal and higher nutrient uptake, crop yield and net return of DSR.
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Claims 5
Claim · model-written summary
Under unweeded control, conventional tillage raised weed nitrogen removal by 37.29% relative to zero tillage.
Verbatim
e0“Total N, P and K removal by weed in unweeded control was 37.29, 47.12 and 35.86% higher under CT than under ZT”
t0“direct-seeded rice”
Claim · model-written summary
Under unweeded control, conventional tillage raised weed phosphorus removal by 47.12% relative to zero tillage.
Verbatim
e0“Total N, P and K removal by weed in unweeded control was 37.29, 47.12 and 35.86% higher under CT than under ZT”
t0“direct-seeded rice”
Claim · model-written summary
Under unweeded control, conventional tillage raised weed potassium removal by 35.86% relative to zero tillage.
Verbatim
e0“Total N, P and K removal by weed in unweeded control was 37.29, 47.12 and 35.86% higher under CT than under ZT”
t0“direct-seeded rice”
Claim · model-written summary
Oxadiargyl followed by fenoxaprop-p-ethyl plus ethoxysulfuron gave the lowest weed biomass and nutrient removal, with higher rice nutrient uptake, yield and net return.
Verbatim
e0“Oxadiargyl fb fenoxaprop-p-ethyl + ethoxysulfuron and oxadiargyl fb penoxsulam + cyhalofop-butyl registered the lowest total weed biomass, weed nutrient removal and higher nutrient uptake, crop yield and net return of DSR”
t0“direct-seeded rice”
Claim · model-written summary
Oxadiargyl followed by penoxsulam plus cyhalofop-butyl gave the lowest weed biomass and nutrient removal, with higher rice nutrient uptake, yield and net return.
Verbatim
e0“Oxadiargyl fb fenoxaprop-p-ethyl + ethoxysulfuron and oxadiargyl fb penoxsulam + cyhalofop-butyl registered the lowest total weed biomass, weed nutrient removal and higher nutrient uptake, crop yield and net return of DSR”
t0“direct-seeded rice”
The same questions in other papers
tillage · weed · Oryza sativa (rice)Results differ
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