. Procedure for developing a site index estimating system from stem analysis data. Site index (Forestry). Table heights at age 30 for 43 trees iree number Height at age 30 JL i IlllIllD C L Height at age 30 11 cc LL Lull U c L Height at age 30 lice fi i itti r\ £i "V* Height at age 30 Feet Feet Feet Feet i OI, J 1 9 9 1 OZ . J 9 / O. J 1 J 9Zl so n ou. u an n 3 14 25 36 4 15 26 37 5 16 27 38 6 17 28 39 7 18 29 40 8 19 30 41 9 20 31 42 10
. Procedure for developing a site index estimating system from stem analysis data. Site index (Forestry). Table heights at age 30 for 43 trees iree number Height at age 30 JL i IlllIllD C L Height at age 30 11 cc LL Lull U c L Height at age 30 lice fi i itti r\ £i "V* Height at age 30 Feet Feet Feet Feet i OI, J 1 9 9 1 OZ . J 9 / O. J 1 J 9Zl so n ou. u an n 3 14 25 36 4 15 26 37 5 16 27 38 6 17 28 39 7 18 29 40 8 19 30 41 9 20 31 42 10 21 32 43 11 22 33 Step 3 Average height at age 50 as calculated from all trees at a location was arbitrarily called the site index of that location. These site indexes are listed in table 3 for each of the 43 trees. For each of 10 ages (10, 15, 20, 25, 30, 35, 40, 45, 60, and 70), site indexes were then plotted over corresponding heights. This step is illustrated in figure 2 for age 30. Note that site indexes in table 3 were plotted over heights in table 2 to give the scatter diagram in figure 2. SITE INDEX 120 I. HEIGHT at AGE 30 ( feet ) Figure 2.—Scdtter diagram. Site index over height at age 30. -3-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Johnson, Floyd A. (Floyd Alfred), 1911-; Worthington, Norman P. , 1903-; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ). Portland, Or. : Pacific Northwest Forest and Range Experiment Station, Forest Service, U. S. Dept. of Agriculture
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