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Adu-Gyamfi, J J and Katayama, K and Devi, G and Rao, T P and Ito, O (1996) Estimation of Soil Nitrogen Status in Intercropping Through Soil Solution. In: Proceedings of the International Workshop: Dynamics of Roots and Nitrogen in Cropping Systems of the Semi-Arid Tropics, 21-25 November 1994, ICRISAT Patancheru, Andhra Pradesh, India.
Adu-Gyamfi, J J and Katayama, K and Devi, G and Rao, T P and Ito, O (1996) Improvement of Soil and Fertilizer Nitrogen Use Efficiency in Sorghum/Pigeonpea Intercropping. In: Proceedings of the International Workshop: Dynamics of Roots and Nitrogen in Cropping Systems of the Semi-Arid Tropics, 21-25 November 1994, ICRISAT Patancheru, Andhra Pradesh, India.