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Smith, G D and Coughlan, K J and Yule, D F and Laryea, K B and Srivastava, K L and Thomas, N P and Cogle, A L (1992) Soil management options to reduce runoff and erosion on a hardsetting Alfisol in the semi-arid tropics. Soil & Tillage Research, 25 (2-3). pp. 195-215. ISSN 0167-1987
Smith, G D and Laryea, K B and Coughlan, K J (1990) Managing Soil Structure Under Rainfed Conditions. In: International Symposium on Applied Soil Physics in Stress Environments, 22-26 Jan 1989, Islamabad (Pakistan).