| A motorized thresher and a treadle cowpea thresher were evaluated in terms of threshing efficiency (%), throughput capacity (kg h-1), cleaning efficiency (%), mechanical damage (%) and percentage loss (%) for three commonly grown cowpea varieties in Nigeria. The three varieties were 994, IAR48 and TVX. The cylinder concave clearances were fixed at 13, 12 and 11 mm based on the major diameter of each cowpea variety. The investigation was conducted at three levels of moisture contents (12.5%, 15% and 17% wet basis). Evaluation results indicated that for motorized thresher threshing efficiency varied from 71.4 to 82.86%, 73.56 to 87.14% and 77. 63 to 88.57% while for treadle thresher threshing efficiency varied from 20.50 to 24.29%, 21.50 to 25.71% and... |
