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Potential Productivity, Yield Gap, and Water Balance of Soybean-Chickpea Sequential System at Selected Benchmark Sites in India.Global Theme 3: Water, Soil, and Agrobiodiversity Management for Ecosystem Health Report No.1

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Title Potential Productivity, Yield Gap, and Water Balance of Soybean-Chickpea Sequential System at Selected Benchmark Sites in India.Global Theme 3: Water, Soil, and Agrobiodiversity Management for Ecosystem Health Report No.1
 
Creator Singh, P
Vijaya, D
Srinivas, K
Wani, S P
 
Subject Chickpea
Watershed management
 
Description ICRISAT’s intervention in the project “Improving Management of Natural Resources for Sustainable
Rainfed Agriculture” funded by the Asian Development Bank aims to increase the productivity and
sustainability of the medium and high water-holding capacity soils in the intermediate rainfall ecoregion of
India, Thailand, and Vietnam. Soybean is the predominant crop in the target region of India and has the
potential to be followed by chickpea crop on a larger scale in the postrainy season. Using the CROPGRO
models of soybean and chickpea, this study examined the potential yields, yield gap, and water balance of
the soybean-chickpea sequential system for the 24 selected benchmark sites within the soybean
production zones of India. Considering the variability in soils and climate, this simulation study showed
that the average potential productivity of the soybean-chickpea system under rainfed situation ranged
from 1390 to 4590 kg ha-1 across sites. The current level of productivity of the system across sites ranges
from 970 to 1780 kg ha-1. The yield gap of 200 to 3300 kg ha-1 for the system indicate the potential to
increase productivity with improved management under rainfed situation. However, higher increases in
yields would be possible in good rainfall years or with supplemental irrigation. Water balance analysis
showed that on an average 35 to 70% of rainfall was used by the crop as evapotranspiration, whereas 25 to
40% was lost as surface runoff indicating the need for water harvesting for supplemental irrigation or to
recharge the groundwater in the target region. Various constraints limiting crop yields in these regions have
been highlighted. It is suggested that location-specific integrated approaches would be needed to bridge
the yield gap of the predominant crops grown in the target regions.
 
Publisher International Crops Research Institute for the Semi Arid Tropics
 
Date 2002
 
Type Monograph
NonPeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/3680/1/globaltheme3.pdf
Singh, P and Vijaya, D and Srinivas, K and Wani, S P (2002) Potential Productivity, Yield Gap, and Water Balance of Soybean-Chickpea Sequential System at Selected Benchmark Sites in India.Global Theme 3: Water, Soil, and Agrobiodiversity Management for Ecosystem Health Report No.1. Monograph. International Crops Research Institute for the Semi Arid Tropics, Patancheru, Andhra Pradesh, India.