Studies on Rice Cultivation in the Tropics

3. Fertilizer Responses in Growing Rice under the Extremely Hot and Dry Climate in Sudan

Abstract

Fertilizer-element experiments and nitrogen-amount and its application-time experiments revealed that (1) nitrogen was by far the most important element for growing rice in the desert of Sudan, (2) effects of phosphate, potassium and sulphur on yield were hardly observable, (3) grain yield increased with an increase in amount of applied nitrogen, but the optimum amount was likely to be 150 kg/ha, and (4) a twice split application at the transplanting time (basal dressing) and at the spikelet: differentiation stage appeared to be best.