What role does ammonia play in national production?

"Food is paramount to the people." The synthetic ammonia industry is the cornerstone of ensuring national food security and an important part of maintaining social stability and unity.With the rapid increase of population, the per capita arable land area has dropped significantly. Chinese arable land per capita fell by nearly half from 0,15hm² in the 1960s to 0.08hm² in the early 2000s.In order to ensure food security, under the limited area of cultivated land, the yield per unit of cultivated land can only be increased. The increase of crop yield per unit area must require more nitrogen elements, and the source of these elements is the synthetic ammonia industry. In recent decades, although the per capita arable land area has dropped significantly, Chinese grain yield per unit area has increased from 1.21t/hm² to 5.45t/hm². China uses 7% of the world's arable land area to feed 21% of the world's population.Furthermore, ammonia plays a very important role in the development of organic chemistry. For example,ammonia  the main feedstock for polyurethane foam.