Ag Data Commons

File(s) stored somewhere else

Please note: Linked content is NOT stored on Ag Data Commons and we can't guarantee its availability, quality, security or accept any liability.

Dairy Gas Emissions Model (DairyGEM)

posted on 2023-11-30, 08:09 authored by USDA Agricultural Research Service

The Dairy Gas Emissions Model (DairyGEM) uses process level simulation and process related emission factors to predict ammonia, hydrogen sulfide, VOC and greenhouse gas emissions along with the carbon, energy and water footprints of dairy production systems. A process-based simulation is used to predict ammonia, hydrogen sulfide, and VOC emissions as influenced by climate and farm management. Net carbon dioxide, methane, and nitrous oxide emissions are also estimated using process simulation or process related emission factors. Environmental footprints are determined that include both primary and secondary sources. Primary sources occur during the farm production process and secondary sources are those occurring during the production of resources used including machinery, fuel, electricity, fertilizer, pesticides, and plastic.

Resources in this dataset:


Agricultural Research Service


Data contact name

Rotz, C. Alan

Data contact email


USDA Agricultural Research Service

Intended use

The Dairy Gas Emissions Model (DairyGEM) is a software tool for estimating ammonia, hydrogen sulfide, greenhouse gas (GHG), and volatile organic compound (VOC) emissions of dairy production systems as influenced by climate and farm management.


  • Not specified

ISO Topic Category

  • biota
  • climatologyMeteorologyAtmosphere
  • environment
  • farming

National Agricultural Library Thesaurus terms

models; emissions factor; ammonia; hydrogen sulfide; volatile organic compounds; greenhouse gas emissions; carbon; energy; water footprint; milk production; production technology; climate; farm management; carbon dioxide; methane; nitrous oxide; farms; fuels; electricity; fertilizers; pesticides; carbon footprint; computer software

OMB Bureau Code

  • 005:18 - Agricultural Research Service

OMB Program Code

  • 005:040 - National Research

Pending citation

  • No

Public Access Level

  • Public

Preferred dataset citation

USDA Agricultural Research Service (2017). Dairy Gas Emissions Model (DairyGEM). USDA Agricultural Research Service.

Usage metrics


    Ref. manager