info:oai:icrisat:3150info:ofi/fmt:xml:xsd:journalTobitaSTobita, SItoOIto, OMatsunagaRMatsunaga, RRaoT PRao, T PRegoT JRego, T JJohansenCJohansen, CYoneyamaTYoneyama, T0178-2762241-248Field evaluation of nitrogen fixation and use of nitrogen fertilizer by sorghum/pigeonpea intercropping on an Alfisol in the Indian semi-arid tropics174Biology and Fertility of Soils1994article