Title Authors Year
Effects of nitrogen loading on wetland ecosystems, with particular reference to atmospheric deposition

Morris, J.T…

1991
Influence of HN3 and (HN4)2 SO4 on heathland vegetation

Van der…

1991
Air pollution and agriculture

Ashmore, M.…

1991
Forestry and soil protection in the UK

Moffatt, A.…

1991
Comparisons of 3 Woodland Sites in NW Britain Differing in Richness of the Epiphytic Lobarion-Pulmonariae Community and Levels of Wet Acidic Deposition

Farmer, A.M…

1991
Increases in soil acidity in north west Wales between 1957 and 1990

…

1991
A Field-Study of Fertilization and Embryonic Development in the Common Frog (Rana-Temporaria) with Particular Reference to Acidity and Temperature

Beattie, R.…

1991
Critical Load Maps for the United Kingdom I: Soil

UKCLAG,

 		1991
Acid rain since 1985 - times are changing

Brydges, T.…

1991
Physiological effects of long term exposure to low concentrations of SO2 and NH3 on poplar leaves.

Hove, L.W.A…

1991