A test of the exponential distribution for stand structure definition in uneven-aged loblolly-shortleaf pine stands (1981)Murphy, P. A., & Farrar, R. M. (1981). A test of the exponential distribution for stand structure definition in uneven-aged loblolly-shortleaf pine stands. Southern Forest Experiment Station, Research Paper SO-164. Retrieved from https://www.srs.fs.usda.gov/pubs/rp/rp_so164.pdf In this study, 588 before-cut and 381 after-cut diameter (dbh) distributions of uneven-aged loblolly-shortleaf pine stands were fitted to two different forms of the exponential probability density function. The left truncated and doubly truncated forms of the exponential were used. The fitted distributions were evaluated using the Kolgomorov-Smirnov one-sample test at the 0.05 significance level. The rejection rates for the singly truncated form were 88 and 89 percent, respectively, for before-cut and after-cut stands. The rejections ran 72 and 77 a percent for the doubly truncated function. Neither function adequately describes the structure of the stands used in the study, but each may have utility in certain regulation applications
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