Title Authors Year
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
Nitrate in soil water

Westling, O…

1991
Nitrogen Uptake and Allocation by Calluna-Vulgaris (L) Hull and Deschampsia-Flexuosa (L) Trin Exposed to 15NH3

Dueck, T.A…

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

Van der…

1991
Forestry and soil protection in the UK

Moffatt, A.…

1991
Concurrent exposure to SO2 and/or NO2 alters groweth and Yield responses of wheat and barley to low concentrations of O3.

Adaros, G…

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

Hove, L.W.A…

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

…

1991