Abstract
In this studies we investigated influence of cultural conditions to amount of protein content in rice ripened kernel. The results are summarized as follows; 1) Conditions of many panicle formation per square meter, such as heavy nitrogen fertilization and dense planting, induced to low percentage of ripened grain, and grow small kernels. 2) Injury of root and leaf-blade, and lodging, also induced low percentage of ripened grain and small kernels. 3) Above different conditions grow as same as small kernels, and small kernels are usually protein rich kernels in this studies. The correlation coefficient between net solidity of rice kernel and amount of protein content of kernel was r=-0.903**. 4) According to our previous report, early variety usually formed protein rich kernels than late variety.
