On-farm trials were executed from (4 growing seasons, 2 years). 56 farmers from selected cells participated in the trial and were expected to maintain the treatment plots for the next 3 continuous seasons, which would enable a total of 4 continuous seasons of crop-rotation. The number of farmers for each cell was determined following the method detailed in Steel and Torrie (1980). Farmers participating in the trial were randomly selected within the cells. Among the farmers who volunteered to participate in the trial, field officers selected plots of sufficient size to accommodate all treatments.