info:oai:icrisat:9704info:ofi/fmt:xml:xsd:journalYoneyamaTYoneyama, TNambiarP T CNambiar, P T CLeeK KLee, K KSrinivasa RaoBSrinivasa Rao, BWilliamsJ HWilliams, J HNitrogen accumulation in three legumes and two cereals with emphasis on estimation of N2 fixation in the legumes by the natural 15N-abundance techniqueBiology and Fertility of Soils0178-2762February 19900925-3001article