. Growth and yield of western hemlock in the Pacific Northwest following thinning near the time of initial crown closing. Forest thinning Northwest, Pacific; Trees Northwest, Pacific Growth; Western hemlock Northwest, Pacific. \ spacing. /\ A / V / \ â I \ I \ I -j \ « \ 1 4 0-ft initial spacing age 27 V \ | (control) spacing, age 27 y 22 20 10 J I I L. ra JZ c £ 0) i _ c £ o > a 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 Net basal area (ft2/acre) Figure 9.âGross annual cubic-foot volume increment, by level of basal area, for spacing treatm
. Growth and yield of western hemlock in the Pacific Northwest following thinning near the time of initial crown closing. Forest thinning Northwest, Pacific; Trees Northwest, Pacific Growth; Western hemlock Northwest, Pacific. \ spacing. /\ A / V / \ â I \ I \ I -j \ « \ 1 4 0-ft initial spacing age 27 V \ | (control) spacing, age 27 y 22 20 10 J I I L. ra JZ c £ 0) i _ c £ o > a 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 Net basal area (ft2/acre) Figure 9.âGross annual cubic-foot volume increment, by level of basal area, for spacing treatments at Cascade Head. i 900 800 700 2 60C u ro C CD E CO k- o c a> E o > co co o o 500 400 300 200 1Q0 10 20 30 Net basal area (m2/ha) 40 50 60 70 80 Absolute control J_= Standaid deviation al age 14. 90 I'll l_ _t t ' I 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 Net basal area (ft2/acre) Figure 10.âGross annual cubic-foot volume increment, by level of basal area, for spacing treatments at Clallam Bay. 400. 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 Hoyer, Gerald E. dn; Swanzy, Jon D. cn; Pacific Northwest Research Station (Portland, Or. ) cn. [Portland, Or. ] : U. S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station
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