Evidence for changing the critical level for ammonia.

[1]  B. Rihm,et al.  Mapping Ammonia Emissions and Concentrations for Switzerland — Effects on Lichen Vegetation , 2009 .

[2]  J. Cape,et al.  Long-Term Cumulative Exposure Exacerbates the Effects of Atmospheric Ammonia on an Ombrotrophic Bog: Implications for Critical Levels , 2009 .

[3]  M. Sutton,et al.  Assessment of Critical Levels of Atmospheric Ammonia for Lichen Diversity in Cork-Oak Woodland, Portugal , 2009 .

[4]  M. Sutton,et al.  Estimation of the Ammonia Critical Level for Epiphytic Lichens Based on Observations at Farm, Landscape and National Scales , 2009 .

[5]  D. Fowler,et al.  Stress responses of Calluna vulgaris to reduced and oxidised N applied under 'real world conditions'. , 2008, Environmental pollution.

[6]  R. Barthelmie,et al.  A review of measurement and modelling results of particle atmosphere–surface exchange , 2008 .

[7]  V. Nicolardi,et al.  Lichen biomonitoring of ammonia emission and nitrogen deposition around a pig stockfarm. , 2007, Environmental pollution.

[8]  M. Sutton,et al.  Detecting changes in epiphytic lichen communities at sites affected by atmospheric ammonia from agricultural sources , 2006, The Lichenologist.

[9]  M. Sutton,et al.  Development of a nitrophobe/nitrophile classification for woodlands, grasslands and upland vegetation in Scotland , 2006 .

[10]  M. Sutton,et al.  Considerations at defining Critical Levels for NH3 , 2006 .

[11]  M. Suttona,et al.  Biomonitoring methods for assessing the impacts of nitrogen pollution : refinement and testing , 2006 .

[12]  J. Cape,et al.  Quantifying Dry NH3 Deposition to an Ombrotrophic Bog from an Automated NH3 Field Release System , 2004 .

[13]  Sutton,et al.  Bioindicator and biomonitoring methods for assessing the effects of atmospheric nitrogen on statutory nature conservation sites , 2004 .

[14]  S. Krupa Effects of atmospheric ammonia (NH3) on terrestrial vegetation: a review. , 2003, Environmental pollution.

[15]  D. Fowler,et al.  Defining the spatial impacts of poultry farm ammonia emissions on species composition of adjacent woodland groundflora using Ellenberg Nitrogen Index, nitrous oxide and nitric oxide emissions and foliar nitrogen as marker variables. , 2002, Environmental pollution.

[16]  G. P. Wyers,et al.  Comparison of low cost measurement techniques for long-term monitoring of atmospheric ammonia. , 2001, Journal of environmental monitoring : JEM.

[17]  J. Cape,et al.  Development and Types of Passive Samplers for Monitoring Atmospheric NO2 and NH3 Concentrations , 2001, TheScientificWorldJournal.

[18]  J. Cape,et al.  Throughfall deposition of ammonium and sulphate during ammonia fumigation of a scots pine forest , 1995 .

[19]  P. Shaw,et al.  The effects of SO2 and O3 on the foliar nutrition of Scots pine, Norway spruce and Sitka spruce in the Liphook open-air fumigation experiment , 1995 .

[20]  M. Pérez-Soba,et al.  Gaseous ammonia counteracts the response of Scots pine needles to elevated atmospheric carbon dioxide. , 1994, The New phytologist.

[21]  L. J. van der Eerden,et al.  Effects of atmospheric ammonia on vegetation--a review. , 1994, Environmental pollution.

[22]  J. Berdowski,et al.  Influence of NH3 and (NH4)2SO4 on heathland vegetation , 1991 .

[23]  H. Kay Environmental Health Criteria , 1980 .

[24]  Der,et al.  Influence of NH 3 and ( NH 4 ) 2 SO 4 on heathland vegetation , 2022 .