Title Authors Year
Concurrent exposure to SO2 and/or NO2 alters groweth and Yield responses of wheat and barley to low concentrations of O3.

Adaros, G…

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

…

1991
Acidic deposition: its nature and impacts

Last, F.T…

1991
Mechansims of adaptions of plants to acid soils

Marschner,…

1991
Critical Load Maps for the United Kingdom I: Soil

UKCLAG,

 		1991
Changes in species composition of semi-natural vegetation associated with the increase in atmospheric inputs of nitrogen

Pitcairn, C…

1991
Acid Rain - Critical and Target Load Maps for the United Kingdom

Environment…

1991
Zeigerwerte von Pflanzen in Mitteleuropa

Ellenberg,…

1991
Conservation of freshwater fish in the British Isles: the current status and biology of threatened species. Aquatic Conservation

Maitland, P…

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

Hove, L.W.A…

1991