The particle size distributions of millfeeds are shown in Fig. 1(a) and (b). Millfeed particle size distributions for the two wheat
classes followed similar trends after fine grinding treatment. The mass median particle diameters of millfeeds were significantly reduced after fine-grinding treatment compared to the original millfeeds with particle diameters of 434 mm for HRS and 442 mm for HRW (P < 0.05).