Thumbnail Image

Theses

Browse

20171
Reset filters
Author: SHARMA, AJIT × Type: Thesis × Rating Count: 4 ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    STATISTICAL INVESTIGATIONS ON CONIFERS OF TEMPERATE ZONE IN HIMACHAL PRADESH
    (UHF,NAUNI, 2017-10) SHARMA, AJIT; GUPTA, R.K.
    ABSTRACT The present investigation entitled “Statistical investigations on conifers of temperate zone in Himachal Pradesh” was carried out in the forest area of Himachal Pradesh. For the study, primary data for diameter and height of conifer plantations was collected from three different forest circles viz. Kullu, Shimla, and Kinnaur. 300 trees of five conifer species viz. Cedrus deodara, Pinus roxburghii, Pinus wallichiana, Abies pindrow and Picea smithiana were recorded from each forest circle and volume was collected from the State Forest Department. The data were subjected to variability analysis in order to test the variability among different circles. Bartlett's chi-square test was used for testing the homogeneity of variances with respect to diameter, height and volume. Various probability distributions were fitted to find out the expected number of trees in each diameter class and its significance was tested by using Kolmogorov-Smirnov test statistic. Gamma distribution was observed best fitted for Cedrus deodara, Pinus wallichiana and Picea smithiana, while normal and log-normal distributions were best fitted for Abies pindrow and Pinus roxburghii respectively to estimate the number of trees in various diameter classes in temperate zone. Regression analysis was done to estimate the volume of conifer species for the construction and prediction of one way volume tables and two way volume tables on the basis of maximum value of R and R , minimum RMSE and Theil’s U-statistic, whereas validation was tested by half-split method and Chow test. The best fit linear model for Cedrus deodara and Pinus wallichiana moreover non-linear power model for Pinus roxburghii, Abies pindrow and Picea smithiana was used to construct two way volume tables. The relative dominance of conifer species was tested out with the help of importance value index (IVI).