Breadcrumb Home Publications On-farm experimentation Regions Africa World Western Europe Europe From Technical Centre for Agricultural and Rural Cooperation (CTA) Publication year 1988 Publication authors Technical Centre for Agricultural and Rural Cooperation Publication Type Magazine or Press item Full Citation CTA. 1988. On-farm experimentation. Spore 15. CTA, Wageningen, The Netherlands. Open original Abstract On-farm Experimentation Handbook For Rural Development Projects / Kurt Steiner (a practical guide published jointly by) CTA and GTZ, the Technical Cooperation Agency of the Federal Republic of Germany