1. Improvement of soil and fertilizer nitrogen use efficiency in sorghum/pigeon pea intercropping;Adu-Gyamfi,1996
2. Field evaluation of root distribution and soil solution N in sorghum/pigeon pea intercropping on an Indian Alfisol;Adu-Gyamfi;Agric. Japanese Soc. Soil Sci. Plant Nutr.,1993
3. Phosphorus uptake by pigeonpea and its role in cropping systems of the Indian subcontinent;Ae;Science,1990
4. Arihara, J., Ae, N., Okada, K., 1991. Root development of pigeonpea and chickpea and its significance in different cropping systems. In: Johansen, C., Lee, K.K., Sahrawal, K.L. (Eds.), Phosphorus Nutrition of Grain Legumes in the Semi-arid Tropics. Patancheru, A.P. 502 234, International crops Research Institute for the Semi-Arid Tropics (ICRISAT), India, pp. 183–194.
5. Nitrogen relationships and residual effects of intercropping sorghum with legumes;Bandyopadhyay;J. Agric. Sci.,1986