1. The relationship between soil pH, organic matter, available P, exchangeable K, Ca, Mg and nine elements in the maize tissue;Agboola;Soil Science,1973
2. Organic carbon;Allison,1965
3. Potassium responses of various crops in East Africa. In Proceedings of the 10th Colloquium of the International Potash Institute, Abidjan, Ivory Coast;Anderson,1973
4. A comparison of the contributions of clay, silt, and organic matter to the effective CEC of soils of sub-Saharan Africa;Asadu;Soil Science,1997
5. Effects of fungicide use on coffee and vegetables on the status of copper and other heavy metals in soils of Lushoto district;Baruti,1997