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Klaij, M C and Hoogmoed , W B (1996) Weeding method and pre-sowing tillage effects on weed growth and pearl millet yield in a sandy soil of the West African Sahelian zone. Soil and Tillage Research, 39 (1-2). pp. 31-43. ISSN 0167-1987
Klaij, M C and Hoogmoed, W B (1993) Soil management for crop production in the West African Sahel. II. Emergence, establishment, and yield of pearl millet. Soil & Tillage Research, 25 (4). pp. 301-315. ISSN 0167-1987
Hoogmoed, W B and Klaij, M C (1990) Soil management for crop production in the West African Sahel. I. Soil and climate parameters. Soil & Tillage Research, 16 (1-2). pp. 85-103. ISSN 0167-1987
Hoogmoed, W B and Klaij, M C and Brouwer, J (1991) Infiltration, runoff and drainage in the Sudano-Sahelian zone. In: Proceedings of the Niamey Workshop, February 1991, Niamey (Niger).
Hoogmoed, W B and Klaij, M C (1988) Tillage and Planting Strategies for Sandy Soils in Niger, West Africa. In: Proceedings of the International Conference on Dryland Farming, August 15-19, 1988, Amarillo/Bushland, Texas U. S.A..