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Oikeh, S O and Somado, E A and Sahrawat, K L and Toure, A and Diatta, S (2008) Rice yields enhanced through integrated management of cover crops and phosphate rock in phosphorus-deficient ultisols in West Africa. Communications in Soil Science and Plant Analysis, 39. pp. 2894-2919.
Somado, E A and Kühne, R F and Sahrawat, K L and Becker, M (2007) Application of low-phosphorus-containing legume residues reduces extractable phosphorus in a tropical Ultisol. Journal of Plant Nutrition and Soil Science, 170 (2). pp. 205-209. ISSN 1436-8730
Somado, E A and Sahrawat, K L (2007) Biomass and nitrogen accumulation by green manure legumes as affected by phosphate rock in submerged soils. African Journal of Agricultural Research, 2 (1). pp. 1-6. ISSN 1991-637X
Somado, E A and Sahrawat, K L and Kuehne, R F (2006) Rock phosphate-P enhances biomass and nitrogen accumulation by legumes in upland crop production systems in humid West Africa. Biology and Fertility of Soils, 43 (1). pp. 124-130. ISSN 0178-2762
Somado, E A and Becker, M and Kuehne, R F and Sahrawat, K L and Vlek, P L G (2003) Combined Effects of Legumes with Rock Phosphorus on Rice in West Africa. Agronomy Journal, 95 (5). pp. 1172-1178. ISSN 1435-0645