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DataMan: A global dataset of nitrous oxide and ammonia emission factors for excreta deposited by livestock and land-applied manure

Beltran, Ignacio and Van Der Weerden, T.J. and Alfaro, M.A. and Amon, Barbara and De Klein, C.A. and Grace, Peter and Hafner, Sasha and Hassouna, Melynda and Hutchings, Nicholas and Krol, D.J. and Leytem, A.B. and Noble, Alasdair and Salazar, Francisco and Thorman, R.E. and Velthof, G.L. (2021) DataMan: A global dataset of nitrous oxide and ammonia emission factors for excreta deposited by livestock and land-applied manure. Journal of Environmental Quality. 22 January 2021. pp. 1-16. Available:

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Nitrous oxide (N2O), ammonia (NH3) and methane (CH4) emissions from the manure management chain of livestock production systems are important contributors to greenhouse gases (GHG) and NH3 emitted by human activities. Several studies have evaluated manure-related emissions and associated key variables at regional, national or continental scales. However, there have been few studies focusing on these emissions using a global dataset. An international project was created (DataMan) to develop a global database on GHG and NH3 emissions from the manure management chain (housing, storage and field), to identify key variables influencing emissions, and ultimately to refine EFs for future national GHG inventories and NH3 emission reporting. This paper describes the “field” database that focuses on N2O and NH3 EFs from land-applied manure and excreta deposited by grazing livestock. We collated relevant information (EFs, manure characteristics, soil properties and climatic conditions) from published peer-reviewed research, theses, conference papers and existing databases. The database, containing 5,632 observations compiled from 184 studies, was relatively evenly split between N2O and NH3 (56% and 44% of the EF values, respectively). The N2O data were derived from studies conducted in 21 countries on five continents, with New Zealand, the UK, Kenya and Brazil representing 86% of the data. The NH3 data originated from studies conducted in 17 countries on four continents, with the UK, Denmark, Canada and the Netherlands representing 79% of the data. Wet temperate climates represented 90% of the total database. The DataMan field database is available online at http://

Item Type: Article
NWISRL Publication Number: 1692
Subjects: Air Quality > Air Emissions
Air Quality > Air Emissions > Manure Management
Depositing User: Users 6 not found.
Date Deposited: 22 Jan 2021 23:11
Last Modified: 22 Jan 2021 23:11
Item ID: 1730