عنوان مقاله [English]
In order to select and introduce the promissing clones of Populus deltoids and P. euramericana, 18 clones were planted 4×4 m in two research stations of Kermanshah province. The statistical design of the experiment was randomized complete block with three replicates. At the end of each growing season, diameter at breast height and height of trees were measured. Moreover, at the last year other factors such as collar diameter, media diameter, top diameter and weight of trees were measured as well. The results after 8 years showed that Populus euramericana 488, P. euramericana 214, P. euramericana 92/40, P. deltoides 77/51, P. euramericana 455 and P. euramericana 561/41 are the most promissing clones. The mean diameter of clones varied between 22. 3 and 26. 7 cm, mean height between 18. 2 and 20m and mean volume increment varied between 27 and 39 m3ha-1y-1.