Potential Productivity and Yield Gap of Selected Crops in the Rainfed Regions of India, Thailand, and Vietnam: Natural Resource Management Program Report no. 5 uri icon

abstract

  • ICRISAT?s intervention in the project ?Improving Management of Natural Resources forSustainable Rainfed Agriculture? funded by the Asian Development Bank aims to increase theproductivity and sustainability of the medium and high water-holding capacity soils in theintermediate rainfall ecoregion of India, Thailand, and Vietnam. This study examined thepotential yield and yield gap of selected crops predominantly grown in the target regions wherethe project is operational. We used the CROPGRO-soybean model to determine the potentialyield and yield gap of soybean crop for several locations in India. For northeastern Thailand andnorthern Vietnam we compared the experimental yields with the farmers? current yields in theregion to estimate the yield gaps. It has been estimated that for several locations in India thesoybean yield gap ranged from 19% to 65% of potential yield. For northeastern Thailand theyield gap for paddy rice, upland rice, maize, and soybean ranged from 11% to 67% of theirrespective potential yields. In northern Vietnam the farmers? maize yields were two-third of thepotential yield; however, groundnut and soybean have a yield gap of 40 to 60% of potentialyield. Various constraints limiting crop yields in these regions have been highlighted. It issuggested that location-specific integrated approaches would be needed to bridge the yield gap ofthe predominant crops grown in the target regions

publication date

  • 2001