. Annual report 1953. Forests and forestry Southern States. A related study of loblolly pine regeneration in shelterwood stands in the Georgia Piedmont showed that seedling growth and form quotient are closely related to stand density and shade level (fig. 2). Estimating Area Shaded by Competing Hardwoods Cultural measures to release pine seedlings are becoming so common that more precise estimates of the expected benefits are needed. The need for liberating pine seedlings, as well as the expected benefits from poison- ing or girdling, can be judged quite accurately from the potential pine- gr
. Annual report 1953. Forests and forestry Southern States. A related study of loblolly pine regeneration in shelterwood stands in the Georgia Piedmont showed that seedling growth and form quotient are closely related to stand density and shade level (fig. 2). Estimating Area Shaded by Competing Hardwoods Cultural measures to release pine seedlings are becoming so common that more precise estimates of the expected benefits are needed. The need for liberating pine seedlings, as well as the expected benefits from poison- ing or girdling, can be judged quite accurately from the potential pine- growing area under the crowns of inferior species. A method of estimating the percent of area shaded by hardwoods h inches in diameter and larger has been developed from a study of residual hardwoods on cutover loblolly pine- hardwood tracts near Franklin, Va. Knowing the basal area of hardwoods per acre, an estimate of percent of area shaded can be obtained by multiplying basal area by l,k. This is the area which a successful girdling or poison- ing job would make available for pine. SHADE LEVEL (FEET)] 40. SH/ VDE L EVEL rEET) 40 30 20 10 40 80 120 160 200 STAND DENSITY INDEX 240 280 300 Figure 2.—Height and form quotient of 6-year-old pine seedlings under different pine overwood densities and levels of shade. - 7 -. 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
