title: World fertilizer nutrient reserves: a view to the future.
abstract: The increasing need for food production in subtropical regions likely translates to a need for additional plant nutrients. As a consequence, knowledge of world fertilizer nutrient reserves is of particular relevance to sustainable agriculture in the subtropics. The stewardship responsibilities of agriculture include the wise use of the raw materials from which commercial fertilizers are produced. Development and implementation of fertilizer best management practices with focus on the 4Rs-right source, right rate, right time, right place-are timely not only for short-term economic and environmental reasons, but also for the wise stewardship of the non-renewable nutrient resources upon which food, feed, fiber, and fuel production depend.
authors.affiliation: International Plant Nutrition Institute, Brookings, SD 57006, USA.
authors.forename: Paul E
authors.initials: PE
authors.lastname: Fixen
authors.forename: Adrian M
authors.initials: AM
authors.lastname: Johnston
mesh_terms: D000383:Agriculture; D003247:Conservation of Natural Resources; D018556:Crops, Agricultural; D005308:Fertilizers; D005523:Food Supply; D006801:Humans; D014329:Tropical Climate
chemical_list: D005308:Fertilizers