APIS Bibliography

Title	Authors	Year
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
Concurrent exposure to SO2 and/or NO2 alters groweth and Yield responses of wheat and barley to low concentrations of O3.	Adaros, G…	1991
The yield of winter cereals exposed to sulphur dioxide under field conditions.	McLeod, A.R…	1991
Forestry and soil protection in the UK	Moffatt, A.…	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
Changes in species composition of semi-natural vegetation associated with the increase in atmospheric inputs of nitrogen	Pitcairn, C…	1991
Nitrate in soil water	Westling, O…	1991