... as lime. Most soils also con- Global Resources Fertilizers • 423tain sufficient amounts of sulfur from the weathering of sulfur-containing minerals, the presence of sulfurin other fertilizers, ... can actuallydecrease yields. If supplied in excessive amounts, some 424 • Fertilizers Global Resources 418 • Feldspars Global Resources Million Metric TonsSource: Mineral Commodity Summaries, ... large number of workers inthisindustry. The top producers of steel in the world are,in order of metric-ton production per year, China, Ja-pan, Russia, and the United States. Each of thesecountries...