. Ponderosa pine saplings respond to control of spacing and understory vegetation. Ponderosa pine; Ponderosa pine Spacing. Figure pine released to a wide spacing (1959), shows excellent height growth and possibly undesirable limb development in the lower whorls. fH Vegetation removed Vegetation left. 1,000 500 250 125 62 TREES PER ACRE AND SPACING (FEET) Figure limb size of the six largest limbs on ponderosa pine saplings after 8 years. Limb Growth Tree branches also responded to thinning and to removal of understory vegetation (figs. 6 and 7). Th
. Ponderosa pine saplings respond to control of spacing and understory vegetation. Ponderosa pine; Ponderosa pine Spacing. Figure pine released to a wide spacing (1959), shows excellent height growth and possibly undesirable limb development in the lower whorls. fH Vegetation removed Vegetation left. 1,000 500 250 125 62 TREES PER ACRE AND SPACING (FEET) Figure limb size of the six largest limbs on ponderosa pine saplings after 8 years. Limb Growth Tree branches also responded to thinning and to removal of understory vegetation (figs. 6 and 7). The six largest branches per tree averaged about inches in diameter at the widest spacing compared with only inch at the spacing. The effect of spacing, understory vegetation, and the interaction of spacing and understory vegetation on limb growth are all statistically significant at the 1-percent level of probability. Increment borings from branches at the widest spacings show that diameter growth rates of inches per decade are not unusual on some of the larger branches. Branch whorls on many trees are extremely close together due to their restricted height growth during the suppression period before thinning and overstory removal. These whorls could easily grow together forming an undesirable defect on the bole. Limb size was a function of tree size. Therefore at wide spacings where current bole diameter was large, average limb size was large. For trees of the same initial branch size increased slightly with spacing. 8. 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
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectponderosapine
