Determination of grain detachment and rupture force must be performed before designing any threshing equipment. Such a study has been undertaken at College of Agricultural Engineering and Technology, OUAT, Bhubaneswar, India during Kharif 2019 and Rabi 2020. The grain detachment and rupture force of six varieties of paddy were determined at four levels of grain moisture content and three levels of loading rate by using Universal Testing Machine. The grain detachment force of single grain was measured for each variety at various grain moisture content at loading rate of 50,100 and 150 mm per min while the rupture force of each variety was determined at three loading rate of 10, 15 and 20 mm per min at same four levels of moisture content. It was observed that the grain detachment force was highest at higher moisture content of grain. This study showed that the detachment force increased with increase in moisture content whereas the rupture force decreased with increase in moisture conte

detachment force, rupture force, pedicel, paddy, moisture content, loading rate

The grain detachment force from the panicles and rupture force of single grain of six popular varieties of paddy in the state were determined at four levels of grain moisture content varying from 13.0 to 17.8%by using UTM. The force required to detach the grains from panicle was measured at three levels of loading rate at 50, 100 and 150 mm/min while the grain rupture force for each variety was undertaken at three levels of loading rate of 10, 15 and 20 mm/min at same four levels of moisture content. The following conclusions were drawn from this study. • Grain detachment force decreased significantly with decrease in grain moisture content for all the six varieties namely Lalat, Pratibha, Birupa, Pratikshya, Sidhanta and Hasantaat all four levels of grain moisture content. • The maximum detachment force(1.47N) of single grain obtained for Sidhanta variety at higher grain moisture content of 17.8% at lowest loading rate of 50mm/min, while the minimum force (0.63N) required for La

Jena, P.P., Goel, A.K., Swain, S.K., Pattnaik, R.R. and Behera, D. (2021). Effect of Moisture Content and Loading Rate on Grain Detachment and Rupture Force of Paddy. Biological Forum – An International Journal, 13(2): 175-183.