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Campbell, G S and Calissendorff , C and Williams, J H (1991) Probe for Measuring Soil Specific Heat Using A Heat-Pulse Method. Soil Science Society of America Journal, 55 (1). pp. 291-293. ISSN 0361-5995
Gash, J H C and Wallace, J S and Lloyd, C R and Dolman, A J and Sivakumar, M V K and Renard, C (1991) Measurements of evaporation from fallow Sahelian savannah at the start of the dry season. Quarterly Journal of the Royal Meteorological Society, 117 (500). pp. 749-760. ISSN 1477-870x
Laryea, K B and Pathak, P and Klaij, M C (1991) Tillage systems and soils in the semi-arid tropics. Soil & Tillage Research, 20 (2-4). pp. 201-218. ISSN 0167-1987
Manu, A and Bationo, A and Geiger , S C (1991) Fertility status of selected millet producing soils of West Africa with emphasis on phosphorus. Soil Science, 152 (5). pp. 315-320. ISSN 0038-075X
Verma, D P and Singh, K D (1991) Changes in the nutrient status of soil caused by cropping and fertilization in a Typic Ustochrept. Fertilizer Research, 29. pp. 267-274. ISSN 0167-1731
Wani, S P and McGill, W B and Robertson, J A (1991) Soil N dynamics and yield of barley grown on breton loam using N from biological fixation or fertilizer. Biology and Fertility of Soils, 12 (1). pp. 10-18. ISSN 0178-2762
Yule, D F and Cogle, A L and Smith, G D and Rao, K P C and George, P J (1991) Soil management of alfisols for water conservation and utilization. Journal of Indian Water Resources Society, 11 (4). pp. 10-13. ISSN 0970-6984
Kerr, J M (1991) Farmers' Practices and Soil and Water Conservation Programs Summary Proceedings of a Workshop 19-21Jun 1991. Documentation. International Crops Research Institute for the Semi-Arid Tropics.
Abdulmumin, S and Singh, P and Virmani, S M (1991) WATERMAN: an operational soil water balance model compatible with IBSNAT data files. In: Soil Water Balance in the Sudano-Sahellan Zone Proceedings of the Niamey Workshop, February 1991, Niamey, Niger.
Smith, G D and Jangawad, L S and Srivastava, K L (1991) Castor Roots In A Vertic Inceptisol. In: Plant roots and their environment. Proceedings of an ISSR symposium, 21-26 August, 1988, Uppsala, Sweden.
Yule, D F and Reddy, M V and Reddy, V R and George, P J and Cogle, A L (1991) Effects of soil management on population abundance and biomass of earthworms in a semi-arid tropical alfisol. In: Proceeding 12th International Conference of International Soil Tillage Research Organization, 1991, Ibadan, Nigeria.
Jayakumar, G W L (1991) Urea hydrolysis in semi-arid tropical alfisols and vertisols. PHD thesis, Andhra Pradesh Agricultural University.