Early development and nutrition of Norway spruce (Picea abies (L.) Karst.) seedlings on different seedbeds in the Bavarian limestone Alps – a bioassay Roland Baier, Rasmus Ettl, Christoph Hahn and Axel GöttleinAnn. For. Sci., 63 4 (2006) 339-348DOI: https://doi.org/10.1051/forest:2006014