Reduced Sulfur Availability has an Impact on N‐Nutrition of Norway Spruce ( Picea abies ) and European Beech ( Fagus sylvatica )

Calculating regressions between main foliar nutrient elements from German forest survey data reveals a relationship between S and N for beech, spruce, pine, and oak. For beech and spruce this relationship can be interpreted as a limiting effect of S on N, as known in agriculture and compensated there by S‐fertilization. Due to strongly reduced emissions, also in forestry S is more and more changing from surplus to deficiency. As fertilization is not an option in this respect, nutrient‐sparing forest management is the only viable approach.