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Table 1 Results of linear mixed models with species (S), drought duration (D), nitrogen fertilization (N) as factors, for water potential (ψleaf), net photosynthetic rate during the drought duration treatment in 2018 and in the recovery growing season in 2019, relative height increment rate (RHI) in 2018 (drought) and 2019 (recovery). Numbers of degrees of freedom (df ), F- andP -values are given.