A working plan for forest lands near Pine Bluff, Arkansas . HE/e/fr-FFET. Fig. 4.—Diagram showing the height growth of Shortleaf and Loblolly line on the basis of diameter breasthigh. 30 WORKING PLAN FOR FOREST LANDS NEAR PINE BLUFF, ARK. the first one hundred years the yearly average growth in height foot, and for the first twenty years feet. (See tig. 8.) Relation of aye to merchantable contents.—The curve here given. 0 20 40 60 80 100 120 140 160 180 200 220 240 AGE — YEARS Fig. 5.—Diagram showing the diameter growth of Shortleaf and Loblolly Pine on the basis of age. shows the v
A working plan for forest lands near Pine Bluff, Arkansas . HE/e/fr-FFET. Fig. 4.—Diagram showing the height growth of Shortleaf and Loblolly line on the basis of diameter breasthigh. 30 WORKING PLAN FOR FOREST LANDS NEAR PINE BLUFF, ARK. the first one hundred years the yearly average growth in height foot, and for the first twenty years feet. (See tig. 8.) Relation of aye to merchantable contents.—The curve here given. 0 20 40 60 80 100 120 140 160 180 200 220 240 AGE — YEARS Fig. 5.—Diagram showing the diameter growth of Shortleaf and Loblolly Pine on the basis of age. shows the volume growth in hoard feet for Shortleaf and LoblollyPine, the contents being calculated according to Doyles Rule. Between 80 and 140 years of age the Shortleaf Pine increases veryuniformly in merchantable contents, after which age the rate of SILVICrLTI RAL NOTES. 31 increase begins to fall off. The merchantable contents of ShortleafPine under 8»» years of age is somewhat uncertain, as the diametersbecome too small for accurate calculations. Between the ages of 60and 100 years the average yearly increase in merchantable contentsamounts to board feet, and between 60 and 200 years to feet. (See tig. 7.) Relation between diameter, total height, merchantable length,* crownlength, and clear (See fig. 8.)—The principal point of inter-est connected with this diagram is the rapid increase in the le
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