Abstract:
To see whether there is a difference of sapwood proportion between Change Mango and Daphar Plantations, observations were recorded on 316 butt logs of shisham from Chang° Mango (Comptt. Nos. 11, 12, 156 and 157) and 294 from Daphar (Comptt. Nos. 69, 78, 79 and 114), in the month of January and February, 1985. Quantity of sapwood and heartwood was assessed on the front end of each log. Thickness of heartwood and heartwood + sapwood from the centre of cross-face of the logs was measured along the four radii. Length of each log indicated the height of observation In the tree and each piece was also measured for the D.B.H. of the tree producing It. Area of heartwood and heartwood + sapwood was calculated by the formula sr 2(r as an average of four raddi), assuming that the boundaries of heartwood and sapwood were complete circles. The percentage difference of outer (heartwood + sapwood U.B.) and inner (heartwood) circles in relation to outer circle gave the percentage of sapwood in the log on the basis of cross-sectional area at that point of measurement. The data was grouped according to D.B.H. with Scm class interval and averages for sapwood and height of measurement for each D.B.H class was also calculated.
Page(s):
89-93
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Forestry, Volume: 35, Issue: 2, Year: 1985