%0 Journal Article %J Environmental Pollution %D 2009 %T Evidence for changing the critical level for ammonia %A Cape, J. N. %A van der Eerden, L. J. %A Sheppard, L. J. %A Leith, I. D. %A Sutton, M. A. %K Whim %B Environmental Pollution %V 157 %P 1033-1037 %G eng %N 3 %0 Journal Article %J Environmental Pollution %D 2008 %T Stress responses of Calluna vulgaris to reduced and oxidised N applied under 'real world conditions' %A Sheppard, L. J. %A Leith, I. D. %A Crossley, A. %A van Dijk, N. %A Fowler, D. %A Sutton, M. A. %A Woods, C. %K ammonia %K atmospheric ammonia %K deposition %K frost hardiness %K heath plants %K leaves %K n status %K nh3 %K nitrogen %K oxidised n %K reduced n %K vegetation %B Environmental Pollution %V 154 %P 404-413 %G eng %N 3 %0 Journal Article %J Atmospheric Environment %D 2007 %T Concentration-dependent NH3 deposition processes for mixed moorland semi-natural vegetation %A Jones, M. R. %A Leith, I. D. %A Fowler, D. %A Raven, J. A. %A Sutton, M. A. %A Nemitz, E. %A Cape, J. N. %A Sheppard, L. J. %A Smith, R. I. %A Theobald, M. R. %K absorption %K ammonia %K atmospheric ammonia %K canopy resistance %K compensation point %K cuticular resistance %K dry deposition %K flux chamber %K heathland %K leaves %K oilseed rape %K ryegrass %K spruce %K surface-exchange fluxes %B Atmospheric Environment %V 41 %P 2049-2061 %G eng %N 10 %0 Journal Article %J Atmospheric Environment %D 2007 %T Concentration-dependent NH3 deposition processes for moorland plant species with and without stomata %A Jones, M. R. %A Leith, I. D. %A Raven, J. A. %A Fowler, D. %A Sutton, M. A. %A Nemitz, E. %A Cape, J. N. %A Sheppard, L. J. %A Smith, R. I. %K ammonia %K atmospheric ammonia %K calluna-vulgaris %K canopy resistance %K communities %K compensation point %K cuticular resistance %K dry deposition %K eriophorum-vaginatum %K exchange %K fertilization %K flux chamber %K forest %K leaves %K nitrogen-content %K stomatal uptake %B Atmospheric Environment %V 41 %P 8980-8994 %G eng %N 39