Volume table for Loblolly pine ( Pinus teada L.) in 18 years old in Plantation Pilambara- Talesh (Guilan province)

This study was conducted on Pilambara- Talesh area in the Guilan province (Nort of Iran). The present research have been carried out on suitable volume table for forest Plantations with Pinus taeda L. in Pilambara area which 220 trees were selected and felled from different diameter and height classes. Using different volume equations, suitable volume table were prepared based on diameter and diameter-height. The results in this study show that minimum RMSE was relevant to two variable volume models that measured about 0.0332. Moreover, the minimum amount of estimated error relevant to two variable volume table was -2/7% while this amount for one variable volume table measured about -8.01%.