. Twenty-year growth of ponderosa pine saplings thinned to five spacings in central Oregon. Ponderosa pine Oregon; Forest thinning Oregon. 10 20 30 40 50 60 70 80 90 100 1 10 120 <5 Initial basal area per acre (square feet) a. Figure 14.—Periodic annual volume incre- ment in relation to basal area at the be- ginning of each growth period on two spac- ing studies. A = Pringle Falls spacing study, understory vegetation removed [y = (1-e -°°°9«292*) 06269498]. B = Pringle Falls spacing study, understory vegetation left [y = (1-e C = Methow study -0-00751 34x, [y =
. Twenty-year growth of ponderosa pine saplings thinned to five spacings in central Oregon. Ponderosa pine Oregon; Forest thinning Oregon. 10 20 30 40 50 60 70 80 90 100 1 10 120 <5 Initial basal area per acre (square feet) a. Figure 14.—Periodic annual volume incre- ment in relation to basal area at the be- ginning of each growth period on two spac- ing studies. A = Pringle Falls spacing study, understory vegetation removed [y = (1-e -°°°9«292*) 06269498]. B = Pringle Falls spacing study, understory vegetation left [y = (1-e C = Methow study -0-00751 34x, [y = (1-e 1. [y = (1-e 0> Q. 25 50 75 100 125 150 175 200 225 Initial stand density index 250 275 300 13. 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 Barrett, James W. (James Willis), 1922- cn; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ) cn. Portland, Or. : Pacific Northwest Forest and Range Experiment Station, U. S. Dept. of Agriculture, Forest Service
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, bookleafnumber17
