Nowadays, the world’s population have been increasing and the demand of food has been increasing too especially rice, while land for cultivation was decrease. *Land utilization has been changing to *resident, *city, and *industry area. A lot of agricultural land are *low soil fertility. So, when we use inbred rice variety. Rice yield may not be enough to meet the demand of consumers. *Therefore, we should increase the yield per area to meet the demand of food.