Abstract
The authors examined the effect of several factors on breaking load (Pb) of a rice kernel by using the compressive test. Paddy showed the value as same as brown rice in a range of high moisture content, but there was the difference between paddy and brown rice in a range of low moisture content below 12%wb. The Pb of rice kernel was effected by the direction of accepted force, the least value was observed when the load was given in pararell with a long axis of kernel. The Pb of rice kernel was also effected by ripening period. In the variety difference, the Pb of Japonica type ordinary rice was larger than any other tested type in this study.
