Optimizing phosphorus and manure application in maize-soybean rotations in Zimbabwe

Soybean production in Zimbabwe is limited because farmers give little attention to the crop and prefer to apply fertilizer to the previous crop in the rotation (maize). Our research showed that the combined application of P fertilizer and manure to maize, as is currently practiced by farmers, was more productive and economic under poor soil fertility conditions. However, there is potential to increase income with application of P and manure to soybean on more fertile soils.