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2. Nutrient management - Wikipedia

   en.wikipedia.org/wiki/Nutrient_management

   Nitrogen fertilizer being applied to growing corn in a contoured, no-tilled field in Iowa.. Nutrient management is the science and practice directed to link soil, crop, weather, and hydrologic factors with cultural, irrigation, and soil and water conservation practices to achieve optimal nutrient use efficiency, crop yields, crop quality, and economic returns, while reducing off-site transport ...

3. Fertilizer - Wikipedia

   en.wikipedia.org/wiki/Fertilizer

   The Birkeland–Eyde process was one of the competing industrial processes at the beginning of nitrogen-based fertilizer production. [12] This process was used to fix atmospheric nitrogen (N 2) into nitric acid (HNO 3), one of several chemical processes called nitrogen fixation. The resultant nitric acid was then used as a source of nitrate (NO ...

4. Illinois Soil Nitrogen Test - Wikipedia

   en.wikipedia.org/wiki/Illinois_Soil_Nitrogen_Test

   Some form of nitrogen fertilizer is needed if levels are below this range. On the other hand, if levels are above this range, addition of nitrogen fertilizer will not increase crop yield. In the corn belt, since about 1975, the predominant method of estimating the amount of nitrogen needed for corn has been the "yield-based" method. A farmer ...

5. Nitrogen and Non-Protein Nitrogen's effects on Agriculture

   en.wikipedia.org/wiki/Nitrogen_and_Non-Protein...

   When discussing the application of nitrogen in agriculture, it is essential to consider the sources of nitrogen used. Synthetic nitrogen fertilizers, such as ammonium nitrate and urea, are commonly applied to crops to replenish soil nitrogen levels and enhance crop productivity [3] These fertilizers provide readily available nitrogen for plant ...

6. Birkeland–Eyde process - Wikipedia

   en.wikipedia.org/wiki/Birkeland–Eyde_process

   The Birkeland–Eyde process was one of the competing industrial processes in the beginning of nitrogen-based fertilizer production. It is a multi-step nitrogen fixation reaction that uses electrical arcs to react atmospheric nitrogen (N 2) with oxygen (O 2), ultimately producing nitric acid (HNO 3) with water. [1]

7. History of the Haber process - Wikipedia

   en.wikipedia.org/wiki/History_of_the_Haber_process

   The history of the Haber process begins with the invention of the Haber process at the dawn of the twentieth century. The process allows the economical fixation of atmospheric dinitrogen in the form of ammonia, which in turn allows for the industrial synthesis of various explosives and nitrogen fertilizers, and is probably the most important industrial process developed during the twentieth ...