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Sahrawat, K L (1988) Use of 15N in Nitrification Inhibitor Studies with Special Reference to Indigenous Materials. Journal of Nuclear Agriculture and Biology, 17. pp. 238-242. ISSN 0379-5489
Virmani, S M and Huda, A K S and Singh, R P and Rego, T J and Rao, K V S (1988) Elements of Climate - Their Relevance to Crop Productivity and Fertilizer Use Planning in the Semiarid Tropics. In: Proceedings of a Colloquium Soil Fertility and Fertilizer Management in Semiarid Tropical India, 10-77 October 7988, ICRISAT Patancheru, Andhra Padesh, India.