TY - REP AU - De la Piedra,C.R. AU - Hibon,A. AU - Jimenez,J.I. AU - Laumans,Q.J.|Winarto,A. AU - Lopez,B.W. TI - Case study 3: maize on-farm research in La Fraylesca, Chiapas, Mexico U1 - 630.715 PY - 1989/// CY - Malang (Indonesia) PB - Malang Research Institute for Food Crops KW - Case studies KW - Chiapas KW - Cropping systems KW - AGROVOC KW - Farmers KW - Marketing KW - Plant population KW - Research KW - Zea mays KW - Yields ER -