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Journal of Soil Science and Plant Nutrition · 2020 · Vol. 20 · Issue 4 · Springer
Low inherent nitrogen (N), phosphorus (P), and potassium (K) contents of smallholder farms limit maize grain yield. Maize grain yield response to N, P, and K mineral fertilizer application and economically optimal rates for nitrogen (EOR N ), phosphorus (EOR P ), and potassium (EOR K ) were evaluated on a Ferric Acrisol within the semi-deciduous forest zone of Ghana. The nutrient rates evaluated were N (0, 30, 60, 90, and 120...