Provenance Variation in the Specific Gravity of Wood of Chir Pine (Pinus roxburghii Sarg.)

Provenance variation in specific gravity of wood of 23 provenances of Chir pine (Pinus roxburghii Sarg.) belonging to 4 States viz. Himachal Pradesh, Jammu &Kashmir, Uttar Pradesh (now in Uttaranchal) and Arunachal Pradesh covering the geographical range between 27ο30' N to 35ο N, Longitude 75ο 20' E to 92ο 30' E and altitude 575 m to 2,200 m has been reported. These studies were carried out on 16-years-old trees growing in a field trial laid out under Indo-Danish Project on Seed Procurement and Tree Improvement (lDPSPTI) in 1981 at New Forest Campus, Dehra Dun, (Alt. 640m Lat. 30ο 20' 40ο N, Long. 78ο 0' and R.F. 216 cm). Significant differences (P