TY - BOOK ED - International Crops Research Institute for the Semi-Arid Tropics TI - Soil, crop, and water management systems for rainfed agriculture in the Sudano - Sahelian zone: : proceedings of an international workshop U1 - 631.4 PY - 1989/// CY - Patancheru PB - The Institute KW - Agua KW - Utilización KW - Suelos agrícolas KW - Suelos y cultivos KW - Suelos KW - Humedad ER -