Provides information on fertilizer use, consumption patterns, composition & regulations. This information is for fertilizers from natural mineral sources & those that are derived from industrial byproducts. The data for heavy metals in fertilizers are used to provide estimates of the rates at which these metals may be added to agricultural soils from standard agronomic practices. The additions of heavy metals to agricultural soil are discussed in terms of federal & international regulations. This report focuses on inorganic fertilizers & their application to agricultural lands. Also gives information on biosolids (sewage sludge) & its regulations, & on the use of recycled industrial byproducts as fertilizers. Tables.