Chapter 5: Quantifying Greenhouse Gas Sources and Sinks in Animal Production Systems. In Quantifying

This chapter provides guidance for reporting greenhouse gas (GHG) emissions associated with entity‚Äźlevel fluxes from animal production systems

Powers W, Auvermann B, Cole A, Gooch C, et al.
U.S. Department of Agriculture 2014 Chapter

Potential use of milk urea nitrogen to abate atmospheric nitrogen emissions from Wisconsin dairy far

This study evaluates how associative changes in dietary crude protein, milk urea nitrogen, and urinary urea nitrogen affect atmospheric nitrogen emissions from dairy farms while discussing challenges and opportunities

Powell JM, Rotz CA, and Wattiaux MA
Journal of Environmental Quality 2014 Journal Article

Gas emissions from dairy barnyards

This study determines impacts of surfaces materials and dairy cattle corralling on gas flux from constructed barnyards

Powell JM and Vadas PA
Animal Production Science 2016 Journal Article

Data: Carbon Dioxide, Methane, Nitrous Oxide, Ammonia Emissions from Digested and Separated Manure


Holly M, Larson RA, Powell JM, Ruark MD, et al.
Ag Data Commons 2016 Popular Media

Potential for Reducing On-Farm Greenhouse Gas and Ammonia Emissions from Dairy Cows with Prolonged

This study explores the effects of long-term condensed tannin (Quebracho and chestnut extracts) addition to dairy cow diets on enteric methane, nitrous oxide, and ammonia emissions from manure.

Duval BD, Aguerre M, Wattiaux M, Vadas PA, et al.
Water, Air, & Soil Pollution 2016 Journal Article

Data: Manure application methods for alfalfa-grass


Sherman, Jessica; Jokela, William; Barford, Carol. 2017.
Ag Data Commons 2017 Popular Media

Greenhouse Gas and Ammonia Emissions from Dairy Manure Management Systems

Describes manure storage, processing, and land application strategies that may decrease dairy farm greenhouse gas emissions.

Sustainable Dairy 2017 Fact Sheet

From waste-to-worth: energy, emissions, and nutrient implications of manure processing pathways

Four manure processing pathways are evaluated to provide a system-level understanding of their impacts on different sustainability indicators. In particular we look at how solid-liquid separation, anaerobic digestion, and AD+SLS affect depletion of fossil fuels, nutrient balances, global warming potential, and ammonia emissions when compared to the base-case pathway of direct land application.

Aguirre-Villegas, et. al.
SCI 2014 Publication

The N Cycle Module 1. The N cycle

Presents the N cycle in an interactive way and the major conversion processes: fixation, mineralization, nitrification, denitrification, ammonia volatilization, and immobilization. Also presents nitrate leaching and crop uptake

Cornell Extension USA / NY Fact Sheet

Nitrogen, ammonia emissions and the dairy cow

Explains how nitrogen fed to cows contributes to ammonia emissions and explores feeding strategies to reduce excess nitrogen in the diet.

Penn State Fact Sheet

Ammonia emissions in dairy farms and fields Abating ammonia emissions from dairy barns and fields

Presents strategies to reduce ammonia emissions in manure and from the soil after manure application

USDA / UW Madison USA / WI Fact Sheet

MUN can track ammonia emissions on dairy farms Easy does it with manure on alfalfa and grass

Explains how MUN can be use to measure the extend of ammonia emissions that escape into the environment in dairy production facilities

USDA / UW Madison USA / WI 2011 Fact Sheet