Since improved grasslands receive very high doses of Nitrogen in fertilisers and manures negative effects of atmospheric N deposition are not expected. In this case the atmospheric Nitrogen inputs could be considered as beneficial, providing a small additional source of 'fertiliser'.
While very large concentrations of SO2 may negatively effect grass growth, studies have shown that grasses may evolve a tolerance to high SO2 levels (Ayazloo and Bell 1981, UKCLAG 1996). The latter would imply that differential effects could be expected on permanent improved grassland than on resown swards and temporary grassland.
Post updated: Mon, 13/10/2014 - 12:14
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