Presents results of a study carried out to develop methodologies for intercropping annual trifolium spp. into wheat, suitable for smallholder farmer conditions. Discusses the effect of soil and climatic factors and factors affecting adoption. Includes data on the effect of P and method of planting on DM yield of intercropped wheat and trifolium spp at Holletta and Shola (Ethiopia), levels of significance of treatment effects on DM yields, and effect of N on DM yields of wheat.