TY  - JOUR
AU  - Asli-Ardeh, E. Askari 
AU  - Abbaspour-Gilandeh, Y. 
PY  - 2008
TI  - Investigation of the Effective Factors on Threshing loss, Damaged Grains Percent and Material Other than Grain to Grain Ratio on an Auto Head Feed Threshing Unit
JF  - American Journal of Agricultural and Biological Sciences
VL  - 3
IS  - 4
DO  - 10.3844/ajabssp.2008.699.705
UR  - https://thescipub.com/abstract/ajabssp.2008.699.705
AB  - Problem Statement: Regarding to considerable production of rice 
crop in Iran, study and investigation about optimization of different stages of 
this product processing seems necessary. The threshing of rice is a process which 
must be accomplished desirability. Approach: In this study, the 
effective factors effects on threshing loss, damaged grain percent and Material 
Other than Grain (MOG) to grain ratio, were investigated on a head feed threshing 
unit. Independent variables were included speed drum in five levels, variety in 
two levels and moisture content of crop in two levels. Experiments were arranged 
as a split-split plot fitted into randomized complete block with four replications. 
Results: Results showed moisture content of crop, variety and 
speed drum factors had significant effects on threshing loss, damaged grains percent 
and MOG to grain ratio. The means of threshing loss and damaged grains percent 
were excessive when the tests were doing with dry crop. The most of means of threshing 
loss and damaged grains percent were allocated to Hashemi and Khazar varieties, 
respectively. The most of MOG to grain ratio means obtained when the tests were 
accomplished with Hashemy variety at wet condition of crop. Conclusions/Recommendations: 
The optimum of drum speed was obtained 650 rpm. It is better that threshing 
of paddy has been conducted in wet condition. Increasing of drum speed increased 
the MOG to grain ratio significantly.