Agricultural nitrogen

D. S. Powlson, Measuring and minimising losses of fertilizer nitrogen in arable agriculture. Nitrogen Efficiency in Agricultural Soil. (D. S. Jenkinson and K. A. Smith, eds.), Elsevier, Oxford, 1988, p. 231. 

Three factors favored construction of ammonia pipelines. First, over 50% of this country s agricultural nitrogen is used in the Midwest and between 40 and 65% of this total is applied directly to the soil as anhydrous ammonia. Second, the low price of natural gas needed for the production of ammonia favored a Gulf Coast plant site or one near a large gas field. Third, much of the Midwest is inaccessible to cheap barge transportation. 

Hansen, S. (1993). Ecological agriculture nitrogen balance in field influenced by fertilization and soil compaction Agronomic and environmental effects of fertilization and soil compaction. Doctor Scientarium Theses, 2. 

Jus Agriculture Nitrogen Consumption Ammonium Nitrate Imports Ammonia Imports... 

Agricultural Nitrogen Institute, 703 Dupont Building, 22 South Second Str., Memphis, Tennessee. 

Ammonia, NHj, is a conunon inorganic air pollutant released as a gas to the atmosphere from several sources. In addition to industrial pollution, such as from heating coal to make coke for steel making, ammonia can be added to the atmosphere by bacterial sources, from sewage treatment, and from the decay of animal wastes. Accidental releases can occur from liquid anhydrous ammonia used as an agricultural nitrogen fertilizer. 

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