The expansion of coal utilization will result in the production of large volumes of coal ash. The utilization and/or disposal of this large volume of coal ash is an important problem for the electric power industry. Thus, this institute is conducting the development and improvement of potassium silicate fertilizer and compound fertilizer which utilize coal ash. In addition to the fertilizer development research, the results of consideration of the use of coal ash for soil improvement and the use of coal ash landfill sites for aguriculture are summarized.
