Institution: | (1) Dipartimento di Scienze del Suolo della Pianta e dell’Ambiente, Universit? degli studi di Napoli “Federico II”, via Universita’ 100, 80045 Portici, Italy;(2) USDA Forest Service, Hardwood Tree Improvement and Regeneration Center, Department of Forestry and Natural Resources, Purdue University, 715 West State Street, West Lafayette, IN 47907-2061, USA; |