Shoot N contents were measured in order to determine whether N nutrition was influenced by the different amendments and thus resulted in the different growth characteristics. Analyses revealed that plants growing on hydrochar had highest shoot N contents despite the fact that the respective plants were smaller than those growing on pyrochar (Fig. 2). N concentrations were higher in plants growing on sandy soil. While N concentrations of plants growing with corn silage or pyrochar amendments increased with the amount of fertilizer added, N concentrations in plants on hydrochar-amended soil seemed to be independent of fertilizer addition.