Effects of sulphur and nitrogen on boreal forest vegetation, soils and nutrient uptake

acid deposition acidification aluminio aluminium azote azufre boreal forests bryophyta calcio calcium carga contaminante charge polluante chimie du sol experimentation fertilisation fertilizer application forest ecology forest soils growth rate magnesio magnesium nitrogen noruega norway picea abies pinus sylvestris plantule podzol podzoles podzols pollutant load potasio potassium seedlings soil chemistry sotobosque soufre suelo forestal sulphur taux de croissance toxicidad toxicity undergrowth vaccinium myrtillus virgin forests