Fitting Statistical Distribution to Diameter and Resin Yield of Pinus roxburghii Stand
DOI:
https://doi.org/10.36808/if/2019/v145i7/147022Keywords:
Pinus roxburghii, Resin, Lognormal and Gamma Probability Distribution.Abstract
Statistical probability distributions are widely used in Forestry to model tree diameter distribution and to explain stand structure. The present investigation was carried out with the objective to fit probability distribution and find expected number of trees in diameter and yield classes. The data were collected on 145 trees for seven years w.e.f. year 2005 to year 2011 from natural regenerated Pinus roxburghii forest Solan Himachal Pradesh. Lognormal and gamma distributions were statistically fitted to observed diameter and resin yield. Kolmogorov-Smirnov test of goodness of fit indicated that these two distributions can be used to estimate number of trees in diameter classes. Also, lognormal distributions can be used to estimate number of trees in resin yield classes.References
DeLiocourt F. (1898). De l'amenagement des Sapiniers. Bull. Soc. For., 3:396-409.
Fallahchai M.M. and Hashemi S.A. (2011). The application of some probability distributions in order to fit the trees diameter in North of Iran. J. Applied Environmental and Biological Sciences, 1(10):397-400.
Hafley W.L. and Schrender H.T. (1977). Statistical distributions for fitting diameter and height data in even aged stands. Canadian J. Forestry Research, 7:481-487.
Mabvurira D., Maltamo M. and Kangas A. (2002). Predicting and calibrating diameter distribution of Eucalyptus grandis (Hill) Maiden plantation in Zimbabwe. New Forest, 23:207-233.
Mataji A., Hojjati S.M. and Namiranian M. (1999). Study on number distribution in diameter classes in natural forests using probability distribution. Iranian J. Natural Resources, 53(2):165-171.
Namiranian M. (1990). Study of tree distribution in diameter classes in natural. Iranian J. Natural Resources, 44:93-108.
Nanang D.M. (1998). Suitability of the normal, log-normal and weibull distribution for fitting diameter distribution of neem plantation in Northern Ghana. Forest Ecology and Management, 231:218-225.
Rubin B.D. and Manion P.D. (2006). Forest Ecology and Management. 222:427-438.
Tewari V.P. (2000). Fitting statistically distribution to diameter measurements of tree stand. Annals of Forestry, 8(2):274-278.
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