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United States Department of Agriculture

Agricultural Research Service

Research Project: Modeling ammonia emissions from feedlot surfaces

Location: Pasture Systems & Watershed Management Research

Project Number: 1902-11130-002-10
Project Type: General Cooperative Agreement

Start Date: Oct 15, 2012
End Date: Dec 31, 2012

Objective:
1. To develop a model based upon physical, biological, and chemical principles that predicts ammonia emission from a feedlot surface. 2. To evaluate the model by comparing predicted ammonia emissions to those measured on two feedlots in Texas over a two year period.

Approach:
Scientific literature related to the processes controlling ammonia emissions from a manure covered feedlot surface will be reviewed. Information will be gathered from this review to formulate relationships for the controlling processes. Computer code will be developed to represent these processes in a simulation through time. This model will be incorporated in the Integrated Farm System Model (IFSM) where it will be used to simulate ammonia emissions from Texas feedlots. Simulated and measured emissions will be compared to determine the accuracy of the model.

Last Modified: 9/20/2014
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