[Soil water content of base cations and aluminium and the effect of growth and resin flow in heavy acidified spruce forests]

acid rain acidification agua del suelo aluminio aluminium arbre forestier calcio calcium cation cationes cations coniferous forests crecimiento croissance eau du sol forest soils forest trees growth magnesio magnesium picea abies pluie acide potasio potassium pourriture des racines resinas resine resins root rots soil water suecia suelo forestal sweden