Nitrogen, Phosphorus, and Potassium Fertilizer effects on Cassava Tuber Yield in the Coastal District of Dondo, Mozambique
Cuvaca, I. B, N. S. Eash, D. M. Lambert, F. R. Walker, and W. P. Rustrick.  2017.  African Journal of Agricultural Research, African Journal of Agricultural Research, Vol. 12 (42); 3112 3119.

Abstract:
Meeting an increasing demand for cassava (Manihot esculenta Crantz) by industrial and commercial food sectors requires basic agronomic information on fertilizer requirements and appropriate fertilizer recommendations for high tuber yield and quality. A no-till study involving twenty fertilizer treatments consisting of different combinations of nitrogen (N), phosphorus (P), and potassium (K) fertilizer rates was initiated in 2013 at Milha-14, in the coastal district of Dondo, Sofala province, Mozambique. The objective of the study was to assess cassava yield performance under different soil fertility and smallholder farm conditions. Applying only 60 kg/ha N (fertilizer combination: 60-0-0 kg/ha N-P2O5-K2O) yielded less (8.5 tons/ha) compared to the unfertilized control treatment (14.7 tons/ ha). Applying 60 kg/ha N combined with 60 kg/ha P2O5 (60-60-0 N-P2O5-K2O kg/ha) yielded the highest (27.7 tons/ha; p < 0.05). No response to K was observed, but K additions are recommended to avoid K mining.