Evaluation the performance of the locally Developed Corn Thresher Machine from Manual to Mechanical System

Abstract

This study was conducted to develop corn thresher located in the College of Agriculture and Forestry, University of Mosul - Iraq in 2022, and this thresher operated by manual system. 1The factors were studied using two varieties of corn (Rayal, ZP), rotation speed 50, 100 rpm, and clearance between threshing wheel and pressing plate 10, 20 mm on some indicators, namely: productivity (kg.h-1), percentage of damaged grains (%), percentage of non-threshed grains (%).Operating costs (dinars. kg-1), the experiment was implemented according to a Complete Randomized Design (CRD), and with three replications .The main objectives of the study were to develop a manual system of thresher machine and to select the most appropriate operating factors that affect its performance. The results of the study showed that the (Rayal) variety was superior to the (ZP) variety in recording the lowest percentage of damaged grains. The rotation speed 100 rpm achieved the highest productivity values and the lowest values for each of (percentage of non-threshed grains, Operating costs), The clearance 20 mm was superior in achieving the highest values for productivity and the lowest values for the percentage of damaged grains, while the clearance 10 mm achieved the lowest values for the percentage of non-threshed grains.