. 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. 800 700 0) 600 _ 500 c <u £ cu o SZ 400 100 10 20 Net basal area (m ha) 30 40 50 60 90. \ 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) Fi
. 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. 800 700 0) 600 _ 500 c <u £ cu o SZ 400 100 10 20 Net basal area (m ha) 30 40 50 60 90. \ 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. 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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