BULK AND HANDLING PROPERTIES OF HULLESS BARLEY

Bulk (standard and compact) and particle densities, emptying and filli ng angles of repose, and friction coefficients against galvanized stee l, plywood, and wood-floated and steel-trowelled concrete surfaces wer e determined for 50 and 95% hulless barley (cultivar 'Condor') in the moisture content (artificially conditioned) ranges of 11.0 to 20.0% an d 10.0 to 21.5%, respectively. For 50% hulless barley, densities were higher at 16.0% moisture content (me) than at other moisture contents. For 95% hulless barley, densities were high both at 10.0 and 14.0% mo isture contents compared to other moisture contents studied. For 50% h ulless barley, emptying (22.7 degrees) and filling (20.8 degrees) angl es were lower at 16.0% me than at other moisture contents. For 95% hul less barley, emptying (34.5 degrees) and filling (32.8 degrees) angles were higher at 21.5% me compared to other moisture contents. Within t he ranges studied, as moisture content increased, coefficient of frict ion 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% me for 95% hulless barley on wood-floated concrete and was minimum (0.25) at 11.0% me for 50% hulless barley on galvanized steel.