At present the erosion phenomena are much more pronounced in Kayawa as compared to Danayamaka, and this is probably related to the steeper slopes in Kayawa. For both villages detailed soil survey data are available. In Danayamaka we observed that 40 years ago farmers were only using the best soils on the long valley slopes, while they are now also cultivating the more marginal crest soils. The recent satellite images could allow us to document this change. Bichi is located in the Sudan savanna .
Main problems are drought, feed scarcity and low agricultural productivity.
Fallow is therefore still common in the region. So, fallow species which work at Mokwa may not perform well at Bida. The main crops grown are yams, maize, sorghum and cowpea for Mokwa, and rice, yams, maize and millet for Bida. Our general objectives are to improve soil productivity by introducing effective fallow species. Currently, at Mokwa, we are testing the selected woody species, Gliricidia and Acacia .