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fertilizer
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The importance of nitrogen and phosphorus in ecosystems
chlorosis ammonium nitrate manure nitrogen fixation compost fertilizer fertilizer application composting
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fertilizer
fertilizer A tractor spreading synthetic fertilizer.

fertilizer

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Written by
Robert E. Stewart
Distinguished Professor of Agricultural Engineering, Texas A&M University, College Station, 1968–80.
Robert E. Stewart
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Last Updated: • Article History

News •

US Awards $116 Million to Spur Fertilizer Competition, Cut Costs • Dec. 19, 2024, 1:10 AM ET (Bloomberg)
Grocery Prices Set to Rise as Soil Becomes 'Unproductive' • Dec. 16, 2024, 4:50 AM ET (Newsweek)
Their Fertilizer Poisons Farmland. Now, They Want Protection From Lawsuits. • Dec. 6, 2024, 2:20 AM ET (New York Times)

fertilizer, natural or artificial substance containing the chemical elements that improve growth and productiveness of plants. Fertilizers enhance the natural fertility of the soil or replace chemical elements taken from the soil by previous crops. Soil fertility is the quality of a soil that enables it to provide compounds in adequate amounts and proper balance to promote growth of plants when other factors (such as light, moisture, temperature, and soil structure) are favourable. Where fertility of the soil is not good, natural or manufactured materials may be added to supply the needed plant nutrients. These are called fertilizers, although the ...(100 of 2816 words)

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