Construction of tree volume tables of scots pine

Scots Pine is an important tree species in Turkey as both forest assets and also its economical value. In this study, single entry and double entry tree volume tables of Scots Pine have been constructed.In order to constructing single entry and double entry tree volume tables, total 90 sample trees from different site and stand conditions were cut down and collected stem analysis data. Using these stem analysis data, 965 pieces of data were derived and were used to develop tree volume models. In addition, these stem analysis data are used to check the validation of these models for the Scots Pine stands at general basis.In order to determination of the suitable volume model, six performance criteria such as Average Residuals or Bias, Average Absolute Residual, Standart Deviation of the Residual or Precision, Percent Variation Explained, Percent Total Error and Percent Absolute Mean Error are consulted. After the validation of both single entry and double entry tree volume equation for Scots Pine stands controlled in Turkey at 0.05 significant level. As a result both equations are suitable for Scots Pine stands in Turkey.Single entry and double entry tree volume tables are constructed according to equations respectively V = b0 + b1 D + b2 D2 and V = b0 + b1 D + b2 D2 + b3 H + b4 D2H