{"references": ["Hafner, S.D., Pacholski, A., Bittman, S., Burchill, W., Bussink, W., Chantigny, M., Carozzi, M., G\u00e9nermont, S., H\u00e4ni, C., Hansen, M.N., Huijsmans, J., Hunt, D., Kupper, T., Lanigan, G., Loubet, B., Misselbrook, T., Meisinger, J.J., Neftel, A., Nyord, T., Pedersen, S.V., Sintermann, J., Thompson, R.B., Vermeulen, B., Vestergaard, A.V., Voylokov, P., Williams, J.R., Sommer, S.G., 2018. The ALFAM2 database on ammonia emission from field-applied manure: Description and illustrative analysis. Agricultural and Forest Meteorology, Greenhouse gas and ammonia emissions from livestock production 258, 66\u201379. https://doi.org/10.1016/j.agrformet.2017.11.027"]}

The ALFAM2 database has measurements of ammonia volatilization (emission) from field-applied liquid animal manure (slurry). The dataset consists of two files: one with plot- (ALFAM2_plot.csv) and one with measurement interval-level (ALFAM2_interval.csv) observations. For information on file headers, see the *-level_variables.csv files. The two data files can be merged on two plot keys (identification codes): pid and pmid. See the README.md file at https://github.com/sashahafner/ALFAM2-data, the web page https://projects.au.dk/alfam/ (or alfam.dk), and the reference and related identifiers here on the Zenodo page for more details.