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| N Use By Plants |
| Nitrate Assimilation |
| Ammonia Assimilation |
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HORT640 - Metabolic Plant Physiology
Utilization of Nitrogen by Plants
Growth in World Demand for Nitrogen Fertilizers
For trends in world fertilizer consumption see "Statistics" at the following URL: International Fertilizer Industry Association
It is now estimated that the total nitrogen fixed by human activities exceeds that of global natural nitrogen fixation (Mlot, 1997).
Human activities now funnel over 140 million metric tons of N into the environment each year; equivalent to 10 million semi-trucks of dry nitrogen fertilizer (Mlot, 1997).
References:
Mengel K 1992 Nitrogen: agricultural productivity and environmental problems. In (K Mengel, DL Pilbeam eds) "Nitrogen Metabolism of Plants", Clarendon Press, Oxford, pp. 1-15.
Mlot C 1997 Tallying nitrogen's increasing impact. Science News 151: 100.
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David Rhodes
Department of Horticulture & Landscape Architecture
Horticulture Building
625 Agriculture Mall Drive
Purdue University
West Lafayette, IN 47907-2010
Last Update: 03/31/08
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