Effect of threshing drum speed and crop moisture content on the paddy grain damage in axial-flow thresher
2010
Alizadeh, M. R., Rice Research Institute of Iran, Rasht (Iran) | Khodabakhshipour, M.
The effects of threshing drum speed of an axial-flow thresher at five levels of 450, 550, 650, 750 and 850 rpm, and paddy moisture content of at three levels 17.0, 20.0 and 23.0% (w.b.) on the broken and cracked grains were examined. The results revealed that the most broken grains of 0.677 was recorded at drum speed of 850 rpm and paddy moisture contents of 17% and the least value was obtained at drum speed of 450 and 550 rpm and paddy moisture content of 23.0%. The cracked grains increased from 7.0 to 37.0%, 6.67 to 25.0% and 14.0 to 17.30% at paddy moisture contents of 17.0, 20.0 and 23.0%, respectively as the drum speed increased from 450 to 850 rpm. The most grain damage was measured at moisture content of 17.0% and the least was obtained at moisture content of 23.0%.
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