?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Foar.icrisat.org%2F3680%2F&rft.title=Potential+Productivity%2C+Yield+Gap%2C+and+Water+Balance+of+Soybean-Chickpea+Sequential+System+at+Selected+Benchmark+Sites+in+India.Global+Theme+3%3A+Water%2C+Soil%2C+and+Agrobiodiversity+Management+for+Ecosystem+Health+Report+No.1&rft.creator=Singh%2C+P&rft.creator=Vijaya%2C+D&rft.creator=Srinivas%2C+K&rft.creator=Wani%2C+S+P&rft.subject=Chickpea&rft.subject=Watershed+Management&rft.description=ICRISAT%E2%80%99s+intervention+in+the+project+%E2%80%9CImproving+Management+of+Natural+Resources+for+Sustainable%0D%0ARainfed+Agriculture%E2%80%9D+funded+by+the+Asian+Development+Bank+aims+to+increase+the+productivity+and%0D%0Asustainability+of+the+medium+and+high+water-holding+capacity+soils+in+the+intermediate+rainfall+ecoregion+of%0D%0AIndia%2C+Thailand%2C+and+Vietnam.+Soybean+is+the+predominant+crop+in+the+target+region+of+India+and+has+the%0D%0Apotential+to+be+followed+by+chickpea+crop+on+a+larger+scale+in+the+postrainy+season.+Using+the+CROPGRO%0D%0Amodels+of+soybean+and+chickpea%2C+this+study+examined+the+potential+yields%2C+yield+gap%2C+and+water+balance+of%0D%0Athe+soybean-chickpea+sequential+system+for+the+24+selected+benchmark+sites+within+the+soybean%0D%0Aproduction+zones+of+India.+Considering+the+variability+in+soils+and+climate%2C+this+simulation+study+showed%0D%0Athat+the+average+potential+productivity+of+the+soybean-chickpea+system+under+rainfed+situation+ranged%0D%0Afrom+1390+to+4590+kg+ha-1+across+sites.+The+current+level+of+productivity+of+the+system+across+sites+ranges%0D%0Afrom+970+to+1780+kg+ha-1.+The+yield+gap+of+200+to+3300+kg+ha-1+for+the+system+indicate+the+potential+to%0D%0Aincrease+productivity+with+improved+management+under+rainfed+situation.+However%2C+higher+increases+in%0D%0Ayields+would+be+possible+in+good+rainfall+years+or+with+supplemental+irrigation.+Water+balance+analysis%0D%0Ashowed+that+on+an+average+35+to+70%25+of+rainfall+was+used+by+the+crop+as+evapotranspiration%2C+whereas+25+to%0D%0A40%25+was+lost+as+surface+runoff+indicating+the+need+for+water+harvesting+for+supplemental+irrigation+or+to%0D%0Arecharge+the+groundwater+in+the+target+region.+Various+constraints+limiting+crop+yields+in+these+regions+have%0D%0Abeen+highlighted.+It+is+suggested+that+location-specific+integrated+approaches+would+be+needed+to+bridge%0D%0Athe+yield+gap+of+the+predominant+crops+grown+in+the+target+regions.&rft.publisher=International+Crops+Research+Institute+for+the+Semi+Arid+Tropics&rft.date=2002&rft.type=Monograph&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Foar.icrisat.org%2F3680%2F1%2Fglobaltheme3.pdf&rft.identifier=++Singh%2C+P+and+Vijaya%2C+D+and+Srinivas%2C+K+and+Wani%2C+S+P++(2002)+Potential+Productivity%2C+Yield+Gap%2C+and+Water+Balance+of+Soybean-Chickpea+Sequential+System+at+Selected+Benchmark+Sites+in+India.Global+Theme+3%3A+Water%2C+Soil%2C+and+Agrobiodiversity+Management+for+Ecosystem+Health+Report+No.1.++Monograph.+International+Crops+Research+Institute+for+the+Semi+Arid+Tropics%2C+Patancheru%2C+Andhra+Pradesh%2C+India.+++++