Growth Relationships in Silver Fir Stands at Their Lower-Altitude Limit in Romania

This study presents the biometric relationships among various increments that is useful in both scientific and practical terms for silvicultural of silver fir. The recorded characteristics trees are a faithful indicator effect work measures environmental conditions. Knowing these increments, them, can contribute to adaptations on stands with purpose reducing risks generated by factors. We carried an inventory based tree increment cores. sample size was determined radial height variability trees. were selected proportion their basal area diameter categories. Current annual (CAIh) measured felled from mean category. For CAIh we models height. Percentages form-height used compute current volume percentage (PCAIv). tree, estimated through had root-mean-square error (RMSE) 0.8749 (CAIv) RMSE value 0.1295. In even-aged stands, hypothetical may have all stand. Conclusions: diameter, height, influenced structural conditions natural structures comprising several generations fir mixed beech other deciduous trees, which been obtained regeneration local provenances, stable must become management targets. Stable condition sustainable stands.