Operating factors affecting harvesting losses of cleaning unit of rice combine harvesters

Abstract

The objective of this study was to study operating factors affecting harvesting losses of cleaning unit of rice combine harvesters. Results of the study indicated that, for Khao Dok Mali 105 variety, harvesting losses were affected by cleaning air velocity, sieve inclination, and height of the barrier plate at 38.4%, 28.1%, and 15.8 %, respectively. On the other hand, for Chainat 1 variety, the air velocity, the height of the barrier plate, and the sieve inclination affected the losses at 46.2%, 33.5%, and 13.7 %, respectively. Effects of Grain moisture content, grain feed rate, sieve speed, and sieve length on the losses were insignificant for both varieties.