00576nam a22002177a 4500003000500000005001700005008004100022010000900063011000900072035000900081040000900090082001500099100001700114245006700131260002900198300001900227650002800246650003500274650003000309700001900339CHAP20220329133640.0971013s1987            r     00010     d  a9011  a9983  a9220  cCHAP  a631.4bC6600aCook, Ray L.  aSoil managementb: a world view of conservation and production  aNew York :bWiley,c1987  a413 p.b: ilus14aSuelosxConservación.14aSuelosxEstudio y enseñanza.14aTierrasxAprovechamiento.0 aEllis, Boyd G.