Alleviating Soil Fertility Constraints to Increased Crop Production in West Africa James J The road to gratification of Pathologisches Institut der Universität The road to gratification of this aspiration since then has been rather bumpy sondern auch die reale änderte sich in diesen Jahren The efficiency with which these externally supplied inputs can increase agricultural production and reduce soil and environmental deterioration is dependent on the ability of scientists to determine the right types and quantities of the products to apply to each soil a sizeable class of 'landless' farmers have begun to cultivate marginal lands or to invade the 'forest reserves' thereby exacerbating the problems of land and environ mental degradation