Bulk and handling properties of hulless barley

Bulk (standard and compact) and particle densities, emptying and filling angles of repose, and friction coefficients against galvanized steel, plywood, and wood-floated and steel-trowelled concrete surfaces were determined for 50 and 95% hulless barley (cultivar 'Condor') in the moisture content (artificially conditioned) ranges of 11.0 to 20.0% and 10.0 to 21.5%, respectively. For 50% hulless barley, densities were higher at 16.0% moisture content (mc) than at other moisture contents. For 95% hulless barley, densities were high both at 10.0 and 14.0% moisture contents compared to other moisture contents studied. For 50% hulless barley, emptying (22.7°) and filling (20.8°) angles were lower at 16.0% mc than at other moisture contents. For 95% hulless barley, emptying (34.5°) and filling (32.8°) angles were higher at21.5% mc compared to other moisture contents. Within the ranges studied, as moisture content increased, coefficient of friction against all surfaces increased for both 50 and 95% hulless barley. Among the surfaces tested, the friction coefficient was maximum (0.60) at 21.5% mc for 95% hulless barley on wood-floated concrete and was minimum (0.25) at 11.0% mc for 50% hulless barley on galvanized steel.