Performance Evaluation of an Imported Machine for Corn Threshing

Abstract The aim of the study is to evaluate the performance of an imported threshing machine and modified locally under different speeds for the threshing cylinder (1416, 1814) RPM, using two cultivars of corn: the first (KN-30) and the second (S6668), and three feed rates (1, 2, 3) kg. The experiment was conducted using a split plot design according to the randomized complete block design, with three replications. Some indicators were studied, including the required specific energy, Percentage of damaged grains, threshing efficiency, productivity, and electrical energy consumption. The results showed that the rotational speed of 1814 RPM had a significant effect on specific energy, electrical energy consumption, threshing efficiency, and productivity. The third feed rate (3 kg) had a significant effect on specific energy and productivity. while for the second cultivar of corn (S6668), it had a significant effect on specific energy, Percentage of damaged grains, and productivity.