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Published in Soil Sci Soc Am J 35:752-755 (1971)
© 1971 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Volatilization of Nitrogen-Containing Compounds from Beef Cattle Areas1

L. F. Elliott, G. E. Schuman and F. G. Viets, Jr.2

ABSTRACT

The release of NH3 plus steam-distillable organic N compounds to the atmosphere from a small beef feedlot and a pasture was measured. Acid traps placed next to the feedlot and 0.8 km from the feedlot averaged 148 and 16 kg/ha per yr NH3 plus steam-distillable organic N compounds, respectively. The same traps averaged 21 and 3.3 kg/ha per yr, respectively, of organic N compounds that were not recovered by the 3-min steam distillation procedure. Feedlot disturbances, such as manure mounding, increased volatilization of N compounds. Ammonia plus steam-distillable organic N compounds trapped near a cattle pasture and cropland averaged 15 and 11 kg/ha per yr, respectively. Organic N compounds not recoverable by the 3-min steam distillation were very low in the areas.

Normally, steam distillation values represent only NH3; however, in this case, other N-containing compounds were distilled over and titrated as NH3.

NOTES

1 Contribution from the Northern Plains Branch, Soil & Water Conservation Research Division, ARS, USDA, in cooperation with the Nebraska Agr. Exp. Sta. This research was partially supported by funds from the Environmental Protection Agency. Published as Paper no. 3063, Journal Series, Nebraska Agr. Exp. Sta.

2 Microbiologist and Soil Scientist, USDA, Lincoln, Neb. 68503; and Soil Scientist, USDA, Ft. Collins, Colo., respectively.

Received for publication March 12, 1971. Accepted for publication April 28, 1971.






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