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Table 8 Confusion matrix obtained when omitting branchiness (QB), crookedness (QC), maximum branch diameter (QMD), presence of F. circinatum (QD), lean (QL), spiral grain (QSP), ovality (QO), and presence of artificial pruning (QP) in the determination of the tree stem-quality. Values are in percentage of trees

From: Improving stem quality assessment based on national forest inventory data: an approach applied to Spanish forests