Crop rotation, tillage and crop residue management for wheat and maize in the sub-humid tropical highlands

Cropping systems in the sub-humid tropical highlands are characterised by continuous cultivated cereal monoculture, leading to serious erosion and fertility decline. There is a lack of information on the impact on crop performance of improved agronomy designed to counter these problems, in particular crop rotation, the use of legumes, reduced tillage and crop residue retention. Over the period 1991–1995 an experiment to test improved agronomy...