COMPARISON OF TOP HEIGHT AND DOMINANT HEIGHT WITH TREE VARIABLES AT THE EVEN AGED Pinus caribaea (MORELET) PLANTATION AT YAGIRALA

Authors

  • Kandasami Pirapaharan Department of Forestry and Environment Science, University of Sri Jayewardenepura
  • S. M. C. U. P. Subasinghe Department of Forestry and Environment Science, University of Sri Jayewardenepura

DOI:

https://doi.org/10.31357/fesympo.v0i0.1299

Abstract

Top height and dominant heights are 'Confusedlyinterpret in many countries. The mainaim of this study was find the similarity of above two terms and to build some models topredict them.

The study was carried out in Yagirala 25 year old even aged Pinus caribaea plantation.Top height and dominant heights were compared with other tree variables. Stratifiedrandom sampling without replacement was used to select the sampling unit. Circular plotsof 0,05 hectare with slope correction and boundary adjustment were used to obtain therequired tree measurements

Diameter at breast height, total height, lower and upper crownheight were measured andbasal area and crown depth were calculated. Top height and dominant height were alsoestimated.

Results indicated that there is a significant difference between top and dominant heights.Also two separate equations to predict these two heights were developed. According to theresults initially ten equations were selected. Five equations described the relationshipbetween top and total height while the other five described the relationship betweendominant height and total height. Finally the best two equations were selected usingcoefficient of variation values and the distributions of standard residuals.

 

Author Biographies

Kandasami Pirapaharan, Department of Forestry and Environment Science, University of Sri Jayewardenepura

Department of Forestry and Environment Science, University of Sri Jayewardenepura

S. M. C. U. P. Subasinghe, Department of Forestry and Environment Science, University of Sri Jayewardenepura

Department of Forestry and Environment Science, University of Sri Jayewardenepura

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Published

2013-07-04

Issue

Section

Forestry and Natural Resource Management