Title Authors Year
Zeigerwerte von Pflanzen in Mitteleuropa

Ellenberg,…

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

Hove, L.W.A…

1991
Forestry and soil protection in the UK

Moffatt, A.…

1991
Mechansims of adaptions of plants to acid soils

Marschner,…

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

…

1991
Single and Interactive Effects of Low Levels of O3, SO2 and NO2 on the Growth and Yield of Spring Rape.

Adaros, G…

1991
Critical Load Maps for the United Kingdom I: Soil

UKCLAG,

 		1991
Seasonal variations in acidic pollutant inputs and their effects on the chemistry of stemflow, bark and epiphyte tissues in three oak woodlands in N.W. Britain

Farmer, A.M…

1991