| Title | Authors | Year | 
|---|---|---|
| Seasonal changes in amino acids, protein and total nitrogen in needles of fertilised Scots pine trees | 
                               Näsholm, T…  | 
                                                                                        1990 | 
| Forest decline, nutrient supply and diagnostic fertilisation in southwestern Germany and in southern California. | 
                               Huettl, R.F…  | 
                                                                                        1990 | 
| Toxicity of heavy metals to brine shrimp Artemia. | 
                               Gajbhiye, S…  | 
                                                                                        1990 | 
| The effect of air quality on tree growth. | 
                               Lee, H.S.J…  | 
                                                                                        1990 | 
| Phytoavailability and toxicity of beryllium and vanadium | 
                               Kaplan, D…  | 
                                                                                        1990 | 
| Forest soil chemical changes between 1949-50 and 1987 | 
                               Billett, M.…  | 
                                                                                        1990 | 
| Effects of nitrogen dioxide pollution on the growth of 3 fern species. | 
                               Ashenden, T…  | 
                                                                                        1990 | 
| Comparative toxicity of inorganic contaminants released by placer mining to early life stages of salmonids | 
                               Buhl, K. J…  | 
                                                                                        1990 | 
| The nutritional status of Picea abies (L.) Karst. across Europe, and implications for "forest decline". | 
                               Cape, J.N…  | 
                                                                                        1990 | 
| Acidic Deposition, its nature and impacts, Glasgow Conference Abstracts | 
                               Caporn, S.J…  | 
                                                                                        1990 |