The United States is the world's largest phosphate exporter and the world's largest potash importer. The U.s. nitrogen trade balance, relatively stable before 1983, has shifted as the United States became a net importer of nitrogen beginning in 1983. This bulletin includes statistics for 1970-91...

The rapid growth in fertilizer consumption throughout the sixties and seventies peaked at 23.7 million nutrient tons in 19R1. U.S. plant nutrient use has since dropped by varying amounts because of fewer crop acres and stabilizing application rates. By 19R,), plant nutrient use totaled 21.7...