Estimation of the ammonia critical level for epiphytic lichens based on observations at farm, landscape and national scales

Sutton, Mark A. ORCID: https://orcid.org/0000-0002-6263-6341; Wolseley, Pat A.; Leith, Ian D.; van Dijk, Netty; Tang, Y. Sim ORCID: https://orcid.org/0000-0002-7814-3998; James, P.W.; Theobald, Mark R.; Whitfield, Clare. 2009 Estimation of the ammonia critical level for epiphytic lichens based on observations at farm, landscape and national scales. In: Sutton, Mark A. ORCID: https://orcid.org/0000-0002-6263-6341; Reis, Stefan ORCID: https://orcid.org/0000-0003-2428-8320; Baker, Samantha M.H., (eds.) Atmospheric Ammonia: Detecting emission changes and environmental impacts. Results of an Expert Workshop under the Convention on Long-range Transboundary Air Pollution. Springer, 71-86.