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Sahrawat, K L and Rahman, M H and Rao, J K (1999) Leaf phosphorus and sorghum yield under rainfed cropping of a Vertisol. Nutrient Cycling in Agroecosystems, 54 (1). pp. 93-98.
Sahrawat, K L and Rego, T J and Rahman, M H and Rag, J K (1998) Phosphorus Response Effects on Macro-and Micronutrient Removal by Sorghum under Rainfed Cropping on a Vertisol. Journal of the Indian Sociely of Soil Science, 46 (1). pp. 58-60. ISSN 0019-638X
Sahrawat, K L and Pardhasaradhi, G and Rego, T J and Rahman, M H (1996) Relationship between extracted phosphorus and sorghum yield in a Vertisol and an Alfisol under rainfed cropping. Fertilizer Research, 44 (1). pp. 23-26.
Sahrawat, K L and Rego, T J and Burford, J R and Rahman, M H and Rao, J K and Adam, A (1995) Response of sorghum to fertilizer phosphorus and its residual value in a Vertisol. Fertilizer Research, 41 (1). pp. 41-47. ISSN 0167-1731