70% of the world's potassium nitrate is used in agriculture, with Israel and the United States producing the most, accounting for about three-quarters of the world's total, and Chile ranks third. In 1995, the total capacity of potassium nitrate in the world was about 900,000 tons per year, of which the direct method accounted for about 75% of production. The current production capacity of potassium nitrate in China was about 60,000 tons per year, and the capacity under construction was also 60,000 tons per year, of which about 80%. Potassium nitrate is used in the industrial sector.