Part 1 Grasping farmer's research: Let's try it out and see how it works, Ueli Scheuermeier; The craft of farming and experimentation, Arthur Stolzenbach; Crazy but not mad, Henri Hocde; Innovative farmers in the Punjab, H.S. Bajwa et al. Part 2 Adding technical options: Village-based cassava breeding in Tanzania, Dominick de Waal et al; Extension through farmer experimentation in Sudan, Samia Osman et al; Moulding our own future, Chesha Wettasinha et al; Starting with local knowledge in participatory research, Aresawum Mengesha, Martin Bull; Tillage research challenges toolmakers in Kenya. David Mellis et al; Farmer research brigades in Zaire, Sylvain Mapatano Mulume; Kuturaya - participatory research, innovation and extension, Jurgen Hagmann et al. Part 3 Improving experimental design: why do farmers experiment with animals traction? Henri Schmitz et al; Empowering farmers to conduct experiments, Edward Ruddell; Farmers' laboratory, Marius Broekema et al. Part 4 Sustaining the process: Strengthening community capacity for sustainable agriculture, Peter Gubbels; Supporting local farmer research committees, Jacqueline Ashby et al; Farmers' study groups in the Netherlands. Lessons and challenges for farmer-led experimentation.