A spreadsheet implementation of the ALFAM2 model for estimation of ammonia volatilization from field-applied animal slurry. This version uses parameter set 3. See the following papers for details on the model. Hafner, S.D., Pedersen, J., Fuß, R., Kamp, J.N., Dalby, F.R., Amon, B., Pacholski, A., Adamsen, A.P.S., Sommer, S.G., 2025. Improved tools for estimation of ammonia emission from field-applied animal slurry: Refinement of the ALFAM2 model and database. Atmospheric Environment 340, 120910. https://doi.org/10.1016/j.atmosenv.2024.120910 Hafner, S.D., Pacholski, A., Bittman, S., Carozzi, M., Chantigny, M., Génermont, S., Häni, C., Hansen, M.N., Huijsmans, J., Kupper, T., Misselbrook, T., Neftel, A., Nyord, T., Sommer, S.G., 2019. A flexible semi-empirical model for estimating ammonia volatilization from field-applied slurry. Atmospheric Environment 199: 474-484. https://doi.org/10.1016/j.atmosenv.2018.11.034 Download a copy of the earlier paper here.