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ICRISAT, - (1989) Programs for Hayman's approach: diallel analysis. Documentation. International Crops Research Institute for the semi-arid Tropics, Patancheru, Andhra Pradesh, India.
Sahrawat, K L (1989) Effects of Nitrification Inhibitors on Nitrogen Transformations, Other Than Nitrification, in Soils. Advances in Agronomy, 42. pp. 279-309.
Singh, M (1989) A note on block designs with nested rows and columns. Biometrical Journal, 31 (2). pp. 213-218. ISSN 0323-3847
Sumner, D A and Mueller , R A E (1989) Are harvest forecasts news? USDA announcements and futures market reactions. American Journal of Agricultural Economics, 71 (1). pp. 1-8. ISSN 0002-9092
Thomas, N P and El-Swaify, S A (1989) Construction and calibration of a rainfall simulator. Journal of Agricultural Engineering Research, 43 (1). pp. 1-9.