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Science 24 October 1969:
Vol. 166. no. 3904, pp. 514 - 515
DOI: 10.1126/science.166.3904.514
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Articles

Nitrogen Enrichment of Surface Water by Absorption of Ammonia Volatilized from Cattle Feedlots

G. L. Hutchinson 1 and F. G. Viets Jr. 1

1 Soil and Water Conservation Research Division, U.S. Agricultural Research Service, Fort Collins, Colorado 80521

Apparatus designed to measure absorption of ammonia from the air by aqueous surfaces was installed near several cattle feedlots and in appropriate control areas. Ammonia absorption rates measured near feedlots were as much as 20 times greater than near the control. Their magnitudes indicate that absorption of ammonia volatilized from cattle feedlots contributes significantly to the nitrogen enrichment of surface water in the vicinity of feedlots.


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