Farmers’ adoption challenges, perception and preferences for yellow root cassava through participatory rural appraisal in Sierra Leone - Kamanda, I.; Nabay, O.; Parkes, Elizabeth Y.; Iluebbey, Peter O.; Olaosebikan, O.; Aina, O.O.; Bello, A.A.; Blay, E.; Asante, I.K.; Danquah, A.; Whyte, J. (International Society for Tropical Root Crops, 2017)