00634     2200193   4500001002100000008004100021035002000062245012100082100003800203260002000241300005700261020001800318520002100336082001000357650003600367650001200403650001100415990001400426INLIS000000000004176                                   Ind    a0010-1118004176  aSoil tillage in Africa: needs and challengescFOOD AND AGRICULTURE ORGANIZATION. LAND AND WATER DEVELOPMENT DIVISION  aFood and Agriculture Organization  aRomebFAOc1993  axiv, 190 p.: ill.; 30 cm.cxiv, 190 p.: ill.; 30 cm.  a92-5-103442-7  aBibl.: p.167-190  a631.4  aSOIL CHEMICOPHYSICAL PROPERTIES  aTILLAGE  aAFRICA  a46/FAO/94