The planning stage of on-farm research: identifying factors for experimentation

Tripp, Robert; Woolley, Jonathan N. 1989. The planning stage of on-farm research : Identifying factors for experimentation. Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT); Cali, CO: Centro Internacional de Agricultura Tropical (CIAT) (CIAT), México, DF, MX. 85 p.