Abstract
To assess economic of different weed control methods on transplanted rice, a research was conducted at farmers’ fields, Bhanu-11, Rupakot, Nepal during the rainy season of 2017. The experiment was laid out using single factorial Randomized Complete Block Designs (RCBD) with three replications of ten treatments as one hand weeding at 21 Days After Transplanting (DAT) (T1); two hand weedings at 21 and 42 DAT (T2); three hand weedings at 21 42 & 63 DAT (T3); single conoweeding at 21 DAT (T4); double cono weedings at 21 &42 DAT (T5); triple cono weedings at 21, 42 &63 DAT (T6); butachlor as pre emergence (T7); butachlor with single manual weeding at 21 DAT (T8); butachlor with double manual weedings at 21 & 42 DAT (T9) and weedy check (T10). All collected data were subjected to analyzed by computer software R package. The results revealed that butachlor as pre-emergence (T7), showed that significantly higher gross return (Rs. 167.51thousand/ha), net profit (Rs. 96.11thousand/ha) and higher benefit-cost ratio (2.346), which is economically viable and profitable and can recommend to the farmers for rainfed lowland condition.
Highlights
Rice (Oryza sativa L) is one of the world’s most important food crops providing major source of the food energy for more than 3.7 billion people (International Rice Research Institute, 2017and Bhandari et al, 2019)
Weeds grow in a field as an unwanted plant and rival with the main plant in the absorption of light, water and nutrients(Vakili, 2000; Nojavan, 2001 and Yaghoobi, 2008).Weed like Echinocola colona, Eleusine indica,Cyperus rotundus,Cyperus difformis, Monochoria vaginalis, Ipomoea aquatic, Eleusine indica, Echinocola crus-galli, Ditilaria ciliaris, Echinochloa glabrescens, Fimbrystylis miliacea, Cyperus iria, etc are the problematic weed flora found in rice field
The main aim of this research was to analyze the economic condition of different weed management practices of rice fields in rainfed condition
Summary
Rice (Oryza sativa L) is one of the world’s most important food crops providing major source of the food energy for more than 3.7 billion people (International Rice Research Institute, 2017and Bhandari et al, 2019). 2020, Vol 8, No 1 and economy of Nepal It shares 20.75% to the Agricultural Gross Domestic Product (AGDP) and accounts 53% of the total food grain production and covers more than 50% of the agricultural production area (Ministry of Agriculture Development, 2015). It is producing about 523027 Mt covering an area of 1552469 ha, with the productivity level of 3.37 t ha-1(Agriculture Information and Communication Centre, 2018). Various biotic (inset, pest, weed etc) and abiotic factors (drought, salinity etc) are mainly responsible to low productivity of rice in Nepal. Weeds grow in a field as an unwanted plant and rival with the main plant in the absorption of light, water and nutrients(Vakili, 2000; Nojavan, 2001 and Yaghoobi, 2008).Weed like Echinocola colona, Eleusine indica,Cyperus rotundus,Cyperus difformis, Monochoria vaginalis, Ipomoea aquatic, Eleusine indica, Echinocola crus-galli, Ditilaria ciliaris, Echinochloa glabrescens, Fimbrystylis miliacea, Cyperus iria, etc are the problematic weed flora found in rice field
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