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2. Transformations of residual fertilizer P in a semi-arid tropical soil under eight-year peanut–wheat rotation;Aulakh;Nutrient Cycling in Agroecosystems,1991
3. Enhanced biological cycling of phosphorus increases its availability to crops in low-input sub-Saharan farming systems;Ayaga;Soil Biology & Biochemistry,2006
4. The Nature and Properties of Soils;Brady,2008
5. Soils of Monarto Town Site;Chittleborough,1976