Nguluu, Simon N.; Ockwell, A. P.; Muhammad, L.; Parton, K. A.; Jones, R. K.; McCown, R. L.
(University of Arizona, 1991-01)
In 1986/87 a farmer survey was conducted, and yields sampled on plots laid out on farmers' fields shortly before harvest, on 18 farms in E. Kenya. 16 of the farmers had participated in pre-extension trials in 1980-82these ...