Disposing of rice hulls and rice straws has been required in Niigata. And, a countermeasure of blowing sand by strong wind is needed at coastal area in Niigata. The purpose of this study is to prevent blowing sand by developing MgO improved soil mixed with rice hull ash and rice straw fibers. Cultivation test using Festuca arunidinacea Schr. and Lolium perenne L. was conducted. Color of leave and rooting zoon were evaluated by image analysis. The results suggest plant grow little by adding MgO over 3 %, plant grow well by mixing rice hull ash.