Physical properties of two rough rice varieties affected by moisture content.

A b s t r a c t. The effect of moisture content on some physical properties of two common rice varieties (Sorkheh and Sazandegi) was determined. Moisture content had a significant effect on minor diameter, geometric mean diameter, mass, bulk and true densities, porosity, static coefficient of friction and angle of repose. The geometric mean diameter, sphericity, true density and angle of repose increased and bulk density decreased as moisture content increased from 12 to 16% (w.b.). The highest coefficient of static friction was observed on concrete surface and the lowest on glass surface among the materials tested. K e y w o r d s: rice, varieties, moisture content, physical properties