. Annual report 1953. Forests and forestry Southern States. THINNING Longleaf Pine Comparatively little effort has "been devoted to the problem of thinning for optimum stand density in the longleaf stands of the Southeast. A recently summarized study involving 22 quarter-acre plots established in 1932 in Florida is indicative of some of the basic relationships be- tween stand density and growth rate per acre and per tree. The results obtained show that maximum volume production of flatwoods longleaf pine is possible over a wide range of stand densities, but that diameter growth and crown
. Annual report 1953. Forests and forestry Southern States. THINNING Longleaf Pine Comparatively little effort has "been devoted to the problem of thinning for optimum stand density in the longleaf stands of the Southeast. A recently summarized study involving 22 quarter-acre plots established in 1932 in Florida is indicative of some of the basic relationships be- tween stand density and growth rate per acre and per tree. The results obtained show that maximum volume production of flatwoods longleaf pine is possible over a wide range of stand densities, but that diameter growth and crown development is distinctly favored by light density. The data further show that where fairly wide spacing is used, such as to favor gum yields and forage production, the sacrifice of wood volume production of longleaf pine on poor flatwoods sites may be less than is generally sup- posed. Also, in view of an early expression of dominance which charac- terizes the species, precommercial thinnings do not appear to be justified. White Pine Were it not for the pioneering efforts in forestry on the Biltmore Estate, information on the management of Appalachian white pine plantations would be several decades in the future. Results are now available showing the effect of six thinnings (I9l6 to 1953) a white pine plantation 53 years after planting, or 56 years from seed (fig. 5)» Plot studies show. - 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 Southeastern Forest Experiment Station (Asheville, N. C. ). Asheville, N. C. : Southeastern Forest Experiment Station, U. S. Dept. of Agriculture, Forest Service
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Keywords: ., bo, bookcentury1900, booksubjectforestsandforestrysouthernstates
