Factors Affecting Breast Height Specific Gravity in Plantation-grown Chir Pine (Pinus roxburghii Sargent)

Of the four variables studied' viz' diameter at broast height' age of wood' radial annual growth rate and relative position of breast height sample point' the age of wood was found to be the most efficient predictor variable for estimating breast height specific gravity in plantation grown chir pine trees. In multiple regression analyses' no other factor significantly affected the specific gravity in the presence of the age of wood. Thus' breast height specific gravity in plantation-grown chir pine trees can be estimated with reasonable accuracy with the help of the age of wood at breast height.