TY - BK AU - Crovetto Lamarca,C. TI - Rastrojos sobre el suelo: Una introduccion a la cero labranza SN - 956-227-039-3 U1 - 631.51 PY - 1992/// CY - Santiago (Chile) PB - Editorial Universitaria, KW - Avena KW - Choppers KW - Erosion KW - Grasslands KW - Harvesters KW - Injurious factors KW - Irrigation KW - AGROVOC KW - Profitability KW - Soil conservation KW - Soil management KW - Soybeans KW - Weed control KW - Winter crops KW - Zero tillage KW - Crop residues KW - Zea mays KW - Wheat N1 - Illustrations, tables, graphs, references, glossary p. 297-301 ER -