Affiliation: | 1.Department of Biosystems Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran ;2.USDA Forest Service, Northern Research Station, Hardwood Tree Improvement and Regeneration Center (HTIRC), Purdue University, PFEN226C, Department of Forestry and Natural Resources, 715 West State Street, West Lafayette, IN, 47907, USA ; |