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Estimating the potential of rainfed agriculture in India: Prospects for waterproductivity improvements

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Title Estimating the potential of rainfed agriculture in India: Prospects for waterproductivity improvements
Estimating the potential of rainfed agriculture in India: Prospects for waterproductivity improvements
 
Creator ICAR_CRIDA
 
Subject Water harvesting,Harvestable surplus,Supplemental irrigation,Efficiency of rainwater use Economics
 
Description Not Available
A detailed district and agro-ecoregional level study comprising the 604 districts of India was undertakento (i) identify dominant rainfed districts for major rainfed crops, (ii) make a crop-specific assessment ofthe surplus runoff water available for water harvesting and the irrigable area, (iii) estimate the efficiencyof regional rain water use and incremental production due to supplementary irrigation for differentcrops, and (iv) conduct a preliminary economic analysis of water harvesting/supplemental irrigation torealize the potential of rainfed agriculture. A climatic water balance analysis of 225 dominant rainfeddistricts provided information on the possible surplus runoff during the year and the cropping season. Ona potential (excluding very arid and wet areas) rainfed cropped area of 28.5 million ha, a surplus rainfallof 114 billion m3(Bm3) was available for harvesting. A part of this amount of water is adequate toprovide one turn of supplementary irrigation of 100 mm depth to 20.65 Mha during drought years and25.08 Mha during normal years. Water used in supplemental irrigation had the highest marginalproductivity and increase in rainfed production above 12% was achievable even under traditionalpractices. Under improved management, an average increase of 50% in total production can be achievedwith a single supplemental irrigation. Water harvesting and supplemental irrigation are economicallyviable at the national level. Net benefits improved by about threefold for rice, fourfold for pulses and sixfold for oil seeds. Droughts have very mild impacts on productivity when farmers are equipped with supplemental irrigation.
Not Available
 
Date 2020-02-26T04:15:05Z
2020-02-26T04:15:05Z
2010
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/33122
 
Language English
 
Relation Not Available;
 
Publisher K V Rao