| Title | Authors | Year | 
|---|---|---|
| Proceedings of the 2nd workshop on sources of variation in ecotoxicological tests with Daphnia magna | 
                               Van der…  | 
                                                                                        1991 | 
| The yield of winter cereals exposed to sulphur dioxide under field conditions. | 
                               McLeod, A.R…  | 
                                                                                        1991 | 
| Mechansims of adaptions of plants to acid soils | 
                               Marschner,…  | 
                                                                                        1991 | 
| Decline of ectomycorrhizal fungi in Europe. | 
                               Arnolds, E…  | 
                                                                                        1991 | 
| Uptake, accumulation and translocation of arsenate in arsenate-tolerant and non-tolerant Holcus lanatus L. | Meharg, A. 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 | 
| Acid deposition: its nature and impacts | 
                               Last, F.T…  | 
                                                                                        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 | 
| Increases in soil acidity in north west Wales between 1957 and 1990 | 
                               …  | 
                                                                                        1991 |