On the character of the trash rice

Abstract

1. Rice kernels may be divided into eight classes, namely, ordinary, white belly, white core, green, rusty, milk-white, partial chalky and chalky kernel. Amongst them, rusty kernels, milk-white kernels and chalky kernels are the grains somewhat injured in their developing process, and may be called as trash rice, owing to their undesirable characters. 2. For the purpose of establishing standards suitable for eliminating trash rice, the following characters and the correlations among them were investigated: -Spetific gravity and weight of husked kernel; specific gravity, weight, length, width and thickness of unhusked kernel. 3. According to the results, it was elucidated that rice might be sorted efficiently by their weight, specific gravity or thickness of chalky kernel, above the upper limits of them the greater part of trash rice being removed practically.