00962nam a2200205Ia 4500 CTU_40336 210402s9999 xx 000 0 und d 631 L253/N8 FAO FAO land and water bulletin; N8 Manual based on the training course " Soil management and conservation - Efficient Tillage helt at IITA, Ibadan, Nigeria 21 April - 1 May 1997,Manual on integrated soil management and conservation practices FAO Rome FAO 2000 This manual has been put together with the objective of assisting actions by the diverse groups ot human beings who intervene in the conservation of the natural resources, particularly soil and water resources and in the context of each continent, country, region or zone. land Nguyễn Quang Điền, 010228 Trung tâm Học liệu Trường Đại học Cần Thơ