. Pruning of ponderosa pine : effect on growth. Ponderosa pine Pruning; Ponderosa pine Growth. Figure growth when various lengths of ponderosa pine crowns are removed. Table annual height growth after pruning of ponderosa pine trees by pruning treatment and growth periods Proportion of live-crown length removed 1941- 1946- 51±' 1951 -57 1941 -57 Feet 11 Percent-;' Feet Percent Feet Percent Feet Percent 0 100 1. 336 100 1. 228 100 100 1/4 94 101 101 99 1/2 94 1. 221 91 99 95 3/4 91 1. 205 90 89 90 —
. Pruning of ponderosa pine : effect on growth. Ponderosa pine Pruning; Ponderosa pine Growth. Figure growth when various lengths of ponderosa pine crowns are removed. Table annual height growth after pruning of ponderosa pine trees by pruning treatment and growth periods Proportion of live-crown length removed 1941- 1946- 51±' 1951 -57 1941 -57 Feet 11 Percent-;' Feet Percent Feet Percent Feet Percent 0 100 1. 336 100 1. 228 100 100 1/4 94 101 101 99 1/2 94 1. 221 91 99 95 3/4 91 1. 205 90 89 90 — Averages differ slightly from those published by Dahms (1) because trees whose tops were damaged during the last period were dropped from height analyses. 2/ — Percent is of height growth for unpruned trees. 6. 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-. Portland, Or. : Pacific Northwest Forest and Range Experiment Station, U. S. Dept. of Agriculture
Size: 1820px × 1373px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
