Shortleaf pine : its economic importance and forest management . thesoil. The presence of a large amount of resin, as in light wood,is commonly thought to increase materially the natural durability ofthe wood. Sapwood is much less durable than heartwood; it can notordinarily be expected to last over two or three years, while goodheartwood may last seven or eight years. When not in contact withthe soil or under conditions particularly conducive to decay, the woodhas given good satisfaction. By proper preservative treatment the durability of short-leaf pinecan be very materially increased. Wood
Shortleaf pine : its economic importance and forest management . thesoil. The presence of a large amount of resin, as in light wood,is commonly thought to increase materially the natural durability ofthe wood. Sapwood is much less durable than heartwood; it can notordinarily be expected to last over two or three years, while goodheartwood may last seven or eight years. When not in contact withthe soil or under conditions particularly conducive to decay, the woodhas given good satisfaction. By proper preservative treatment the durability of short-leaf pinecan be very materially increased. Wood preservation is discussed ina number of publications, among which are Forest Service Bulletins78, 84,107,118, and Circular 209. MECHANICAL PROPERTIES. The wood of shortleaf pine is strong and stiff and therefore veryvaluable for structural timber. It often contains the same numberof rings per inch and is very similar in wood structure to longleafpine, which holds first place among the southern pines used for this Bui. 308, U. S. Dept. of Agriculture. Plate F-13191A Fig. 1.—View Through the Tops of the Trees Shown Below.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1915
