Prceedings of an International Workshop 11-16, January 1987 ICRISAT Sahelian Center Niamcy, Niger text India ICRISAT c1989 monographic xiii,385 p, : ill., Includes bibliographical references. Sponsored by Insitut national de recherches agronomiques du Niger (INRAN), United States Department of Agriculture (USDA), United States Agency for International Development (USAID), Tropsoils (Texas A&M University), and International Crops Research Institute for the semi-Arid Tropics (ICRISAT). Soil Agriculture S591.3 .65 1989. 9290661690 UOEL 000 20150330153509.0