California Air Resources Board

Project Updates

N₂O Stakeholder Meetings

CARB staff periodically hosts conference call meetings for the purpose of providing updates on N₂O research activities being conducted by academia and funded by CARB, the California Department of Food and Agriculture (CDFA), the California Energy Commission (CEC) and CalRecycle.  Currently, CARB, CDFA, CEC and CalRecycle have funded ten N₂O research projects through 2016. Links to research presentations and final reports are provided below.

Background, N₂O Emissions Research

• Research on N₂O Emissions from Agricultural Soils in CA
  Presented by S. Livingston, CARB, May 21, 2008
• CARB's Collaborative Research on N₂O Emissions from Agricultural Soils
  Presented by S. Livingston, CARB, Sept. 9, 2008
• Research on GHG Emission from N Fertilizer Use
  Presented by A. Gunasekara,CDFA, Sept. 9, 2008
• Research on N₂O Emissions from the Application of Fertilizers
  Presented by L. Siegel, CEC PIER, Sept. 9, 2008

N₂O Emissions Research Projects

Pesticides Impacts on N₂O Emissions from California Cropping Systems

• Quantifying and identifying the potential causes nitrous oxide emissions in California soils under fumigation
  J. Rodrigues of UC Davis (CARB funded, 2023-2026)
  Research Proposal, presented September 6, 2023

Baseline N₂O Emissions from California Cropping Systems

• Nitrous Oxide Emissions in Response to Nitrogen Fertilization
  W. Horwath, UC Davis (CARB funded, 2009-2013)
  Research Proposal, presented Aug. 24, 2009
  Final Report, Abstract, presented May 9, 2012
  Final Report, Full Text,  presented May 9, 2012
• Measuring and Modeling Nitrous Oxide Emissions from California Cotton, Corn and Vegetable Cropping Systems
  D. Goorahoo, CSU Fresno (CDFA funded, 2009-2014)
  Project was amended in 2012 to evaluate only cotton and tomato systems
  Research Proposal, presented Aug. 24, 2009
• N₂O Emissions from Application of Fertilizers in Agricultural Soils
  J. Six, UC Davis (CEC funded, 2009-2012)
  Research Proposal, presented Aug. 24, 2009
  Final Report, presented Sept. 12, 2011
• Determining NO_x Emissions from Soil in California Cropping Systems to Improve Ozone Modeling
  W. Horwath, UC Davis (CARB funded, 2010-2013)
  Research Proposal, presented May 17, 2010
  Final Report, Abstract, presented Jan. 29, 2014
  Final Report, Full Text, presented Jan. 29, 2014
• Assessment of Baseline Nitrous Oxide Emissions in Response to a Range of Nitrogen Fertilizer Application Rates in Corn Systems
  M. Burger, UC Davis (CARB funded, 2013-2014)
  Research Proposal, presented Aug. 24, 2009
• Assessment of Nitrous Oxide Emissions in California's Dairy Systems
  W. Horwath, UC Davis (CARB funded, 2010-2013)
  Research Proposal, presented May 17, 2010
  Final Report, Abstract, presented Jan. 29, 2014
  Final Report, Full Text, presented Jan. 29, 2014
• Assessment of Baseline Nitrous Oxide Emissions in California's Cropping Systems
  Combined Research Seminar, presented Nov. 28, 2012

Evaluating N₂O Emissions Mitigations for Cropping Systems

• Evaluating Mitigation Options of Nitrous Oxide Emissions in California Cropping Systems
  M. Burger, UC Davis (CARB funded, 2011-2015)
  Research Proposal, presented May 16, 2012
  Research Overview, presented May 16, 2012
  ​​​​​​​Final Report, Full Text, presented January 7, 2016

N₂O Emissions from Composting Systems

• Research to Evaluate Nitrous Oxide (N₂O) Emissions from Compost in Support of AB 32 Scoping Plan Composting Measure
  W. Horwath, UC Davis (CalRecyle funded, 2010-2014)
  Work Plan, presented May 17, 2010

Modeling N₂O Emissions from Cropping Systems

• Calibrating, Validating and Implementing Process Models for California Agricultural Greenhouse Gas Emissions
  C. Li,  Univ. of NH (CARB funded, 2010-2014)
  Research Proposal, presented Jan. 26, 2011
  Final Report, Abstract, presented January 29, 2014
  Final Report, Full Text, presented January 29, 2014

• Improving DNDC Modeling Capability to Quantify Mitigiation Potential of Nitrous Oxide from California Agricultural Soils
  J. Deng, Univ. of NH (CARB funded, 2014-2016)
  Research Overview, presented Jan. 29, 2014
  Final Report, Full Text, presented September 6, 2017

For more information, contact Lei Guo at (916) 322-8097.