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This article in JEQ

  1. Vol. 37 No. 2, p. 515-520
     
    Received: Oct 1, 2007


    * Corresponding author(s): viney_aneja@ncsu.edu
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doi:10.2134/jeq2007.0002in

Ammonia Assessment from Agriculture: U.S. Status and Needs

  1. Viney P. Aneja *a,
  2. Jessica Blundena,
  3. Kristen Jamesa,
  4. William H. Schlesingerb,
  5. Raymond Knightonc,
  6. Wendell Gilliamd,
  7. Greg Jenningsd,
  8. Dev Niyogie and
  9. Shawn Colee
  1. a Dep. of Marine, Earth, and Atmospheric Sciences, North Carolina State Univ., Raleigh, NC, USA
    b Inst. of Ecosystem Studies, Millbrook, NY 12545
    c USDA, Washington, DC, USA
    d Dep. of Soil Sciences, North Carolina State Univ., Raleigh, NC, USA
    e Purdue Univ., West Lafayette, IN, USA

Abstract

Recent studies suggest that human activities accelerate the production of reactive nitrogen on a global scale. Increased nitrogen emissions may lead to environmental impacts including photochemical air pollution, reduced visibility, changes in biodiversity, and stratospheric ozone depletion. In the last 50 yr, emissions of ammonia (NH3), which is the most abundant form of reduced reactive nitrogen in the atmosphere, have significantly increased as a result of intensive agricultural management and greater livestock production in many developed countries. These agricultural production practices are increasingly subject to governmental regulations intended to protect air resources. It is therefore important that an accurate and robust agricultural emission factors database exist to provide valid scientific support of these regulations. This paper highlights some of the recent work that was presented at the 2006 Workshop on Agricultural Air Quality in Washington, D.C. regarding NH3 emissions estimates and emission factors from agricultural sources in the U.S. and Europe. In addition, several best management practices are explored as the scientific community attempts to maximize the beneficial use of reactive nitrogen while simultaneously minimizing negative environmental impacts.

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Copyright © 2008. American Society of Agronomy, Crop Science Society of America, Soil Science SocietyAmerican Society of Agronomy, Crop Science Society of America, and Soil Science Society of America