| Title | Authors | Year | 
|---|---|---|
| Large Lakes: ecological structure and function | 
                               Kilham, S.S…  | 
                                                                                        1990 | 
| Alger, lavar och Garrupprattning hos unggranar langs en kvavegradient Sverige-Holland | 
                               Garansson,…  | 
                                                                                        1990 | 
| 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 | 
| The effect of air quality on tree growth. | 
                               Lee, H.S.J…  | 
                                                                                        1990 | 
| Yield Responses of Different Crop Species to Long-Term Fumigation with Sulphur Dioxide in Open-Top Chambers | 
                               Weigel, H.J…  | 
                                                                                        1990 | 
| Forest soil chemical changes between 1949-50 and 1987 | 
                               Billett, M.…  | 
                                                                                        1990 | 
| Comparative toxicity of inorganic contaminants released by placer mining to early life stages of salmonids | 
                               Buhl, K. J…  | 
                                                                                        1990 | 
| Phytoavailability and toxicity of beryllium and vanadium | 
                               Kaplan, D…  | 
                                                                                        1990 | 
| The variation in the acidity of ground and surface waters in Northern Ireland | 
                               Jordan, C…  | 
                                                                                        1990 |