info:oai:icrisat:3191info:ofi/fmt:xml:xsd:journalDouthwaiteBDouthwaite, BBakerDBaker, DWeiseSWeise, SGockowskiJGockowski, JManyongV MManyong, V MKeatingeJ D HKeatinge, J D HEcoregional research in Africa: learning lessons from IITA's Benchmark Area ApproachExperimental Agriculture0014-4797200541271-2983article