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Hayashi, K and Abdoulaye, T and Matsunaga, R and Tobita, S (2012) Appraisal of Local Farmers’ Practices on Land Management for a Guideline of Agricultural Development in the Sahel Zone of Niger. JARQ - Japan Agricultural Research Quarterly, 43 (1). pp. 63-69. ISSN 0021-3551
Hayashi, K and Matsumoto, N and Hayashi, E T and Abdoulaye, T and Shinjo, H and Tabo, R and Matsunaga, R and Tobita, S (2012) Estimation of nitrogen flow within a village-farm model in Fakara region in Niger, Sahelian zone of West Africa. Nutrient Cycling in Agroecosystems, 92 (3). pp. 289-304. ISSN 1385-1314
Devi, G and Ito, O and Matsunaga, R and Tobita, S and Rao, T P and VidyaLakshmi, N and Lee, K K (1996) Simulating Root System Development of Short-duration Pigeonpea. Experimental Agriculture, 32 (1). pp. 67-68. ISSN 1469-4441
Katayama, K and Ito, O and Matsunaga, R and Adu-Gyamfi, J J and Rao, T P and Anders, M M and Lee, K K (1995) Nitrogen balance and root behavior in four pigeonpea-based intercropping systems. Fertilizer Research, 42 (1-3). pp. 315-319.
Tobita, S and Ito, O and Matsunaga, R and Rao, T P and Rego, T J and Johansen, C and Yoneyama, T (1994) Field evaluation of nitrogen fixation and use of nitrogen fertilizer by sorghum/pigeonpea intercropping on an Alfisol in the Indian semi-arid tropics. Biology and Fertility of Soils, 17 (4). pp. 241-248. ISSN 0178-2762
Matsunaga, R and Ito, O and Tobita, S and Rao, T P and Johansen, C (1994) Response of short-duration pigeonpea to nitrogen application after short-term waterlogging on a Vertisol. Field Crops Research, 38 (3). pp. 167-174. ISSN 0378-4290
Rao, T P and Ito, O and Matsunaga, R (1993) Differences in uptake kinetics of ammonium and nitrate in legumes and cereals. Plant and Soil, 154 (1). pp. 67-72. ISSN 0032-079X
Tobita, S and Shinjo, H and Hayashi, K and Matsunaga, R and et al, . (2011) Identification of plant genetic resources with high potential contribution to soil fertility enhancement in the Sahel, with special interest in fallow vegetation. In: Innovations as Key to the Green Revolution in Africa. Exploring the Scientific Facts . Springer, Netherlands, pp. 701-706. ISBN 978-90-481-2541-8
Ito, O and Tobita, S and Matsunaga, R and Rao, T P and Johansen, C (1992) Inorganic Nitrogen In Soil Water Collected From Soil Under Intercrop Components Sorghum And Pigeonpea - A Pot Experiment. In: Proceedings of the International Symposium, 1992, Ludhiana, India.
Matsunaga, R and Ito, O and Tobita, S and Rao, T P (1992) Response Of The Pigeonpea (Cajanus Cajan (L.) Millspaugh) To Nitrogen Application And Temporary Waterlogging. In: Root Ecology and its Practical Application proceedings of the 3d ISRR-symposium, 2nd - 6th September 1991, Wien, Austria.
Ito, O and Matsunaga, R and Tobita, S and Tao, T P (1992) Rooting Behavior Of Intercropped Pigeonpea (Cajanus Cajan (L.) Millspaugh) And Sorghum (Sorghum Bicolor (L.) Moench). In: Root Ecology and its Practical Application proceedings of the 3d ISRR-symposium, 2nd - 6th September 1991, Wien, Austria.