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Economic Analysis of Diversified Rotational Cropping Systems in the Lateritic Belt of Lower Gangetic Plain of Eastern India

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Journal of Agricultural Science and Technology(B) 2011年第3期1卷 331-341页

作者： D. Mandal K. Baral D. C. Ghosh J. timsina M. K. Dasgupta Uttar Dinajpur Krishi Vigyan Kendra （Uttar Banga Krishi Viswavidyalaya） Chopra-733216 Uttar Dinajpur West Bengal Palli-Siksha Bhavana Institute of Agriculture Visva-Bharati Sriniketan-731236 Birbhum West Bengal IRRI-Bangladesh Office Dhaka 1206 Bangladesh

Economic analysis of different diversified rotational cropping systems under Farmers＇ package/practices and improved package/practices was conducted in Birbhum district, West Bengal, located in the red and lateritic belt of lower Gangetic plain of eastern lndia. Diversified triple cropping systems （peanut-brinjal＋brinjal, rice-potato-pumpkin, and cucumber-cabbage-basella） required higher cost for cultivation, but also produced higher rice equivalent yield, higher net return and higher return rupee1 invested in both management practices. Considering the resource-ability and risk-bearing capacity, and net return and return rupee^-1 （RPR） invested, these cropping systems can be recommended for resource-rich farmers. Rice-rapeseed-cowpea, rice-wheat-green gram and radish-tomato-amaranthus systems profitable. These cropping systems can be required less inputs for cultivation, were less risky, and economically viable and recommended for resource-poor farmers. Peanut-brinjal ＋ brinjal-okra-chilli ＋ chilli-cucumber-cabbage-basella system was the best among all the 3-year rotational systems in respect to RPR in both management practices. This rotational system will be suitable for resource-rich farmers. Vegetable-based rotational systems （ridge gourd-marigold-okra-black gram-pointed gourd ＋ pointed gourd-radish-tomato-amaranthus） or rice-based rotational system （rice-wheat-green gram-rice-rapeseed-cowpea-rice-potato-pumpkin） also found to be suitable to increase the profitability and system sustainability. These cropping systems can be recommended for all groups of farmers.

关键词： Cropping systems rotational cropping systems productivity economics west Bengal India.

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Weed Incidences and Their Effect on Crop Productivity under Diversified Rotational Cropping Systems in the Lateritic Belt of Lower Gangetic Plain of Eastern India

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Journal of Agricultural Science and Technology(B) 2011年第4期1卷 511-522页

作者： D. Mandal D. C. Ghosh K. Baral M. K. Dasgupta J. timsina Uttar Dinajpur Krishi Vigyan Kendra Uttar Banga Krishi Viswavidyalaya Chopra 733216 Uttar Dinajpur West Bengal Palli-Siksha Bhavana Institute of Agriculture Visva-Bharati Sriniketan 731236 Birbhum West Bengal IRR1-Bangladesh Office Dhaka 1206 Bangladesh

A field experiment was conducted from 2002-2005 on a sandy clay loam red and lateritic soil under irrigation in a farmer＇s field at Senkapur （Lat. 23°36.79′ N, Long. 87°38.14′E, Elev. 46 m AMSL）, Birbhum, West Bengal, India. The objective was to provide the temporal changes of weed diversity and density, ecology, and impact of rotational cropping systems on different crops under double and triple cropping systems with improved （IP） and farmer＇s packages （FP）. There was significantly higher weed density in FP than in IP on all years. Grasses and sedges were more in vegetable-based rotational systems; but grasses and broad leaf weeds （BLWs） were more in rice-based rotational systems. The lowest weed population was in vegetable-based systems. Grasses increased in rice-based systems but gradually decreased in vegetable-based systems in subsequent years. Sedge density was higher in vegetable- than in rice-based rotational systems. Density of BLWs was higher but that of sedges was lower in rice-based rotational systems as compared to vegetable-based systems. Density of BLWs gradually decreased in all rotational systems over the years in both packages. Density of weeds decreased gradually in subsequent years indicating the positive effect of rotational systems on suppression of weeds. Results indicate that the weed density can be reduced through judicious diversified rotational cropping systems. Peanut-brinjal＋brinjal, okra-chilli＋chilli and cucumber-cabbage-basella systems greatly reduced the weed density in both packages, and hence can be recommended for the lateritic belt of lower Gangetic plain of eastern India.

关键词： Cropping systems diversified rotational cropping systems weed density weed ecology farmers' package (FP) improved package (IP) India

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