. Bulletin (Pennsylvania Department of Forests and Waters), no. 46-50. Forests and forestry. 24 The BEixii-BiKCH-^rAPLE Forest Type in Pennsylvania The Beecii-Bikch-Maple Forest Type in Pennsylvania 25 tliat the original stands were cut cleanly, then permitted to grow again. Tliis explains why no attempt was made to work out the actual board foot yield of beecli-birch-maple stands. Data supplied by Robert Lyman, forester of the Gray Chemical Company, and collected from a natural even-aged 25-year-old beech- birch-mai)le stand in Potter County, showed a yield of 23 stacked coids of chemical-woo
. Bulletin (Pennsylvania Department of Forests and Waters), no. 46-50. Forests and forestry. 24 The BEixii-BiKCH-^rAPLE Forest Type in Pennsylvania The Beecii-Bikch-Maple Forest Type in Pennsylvania 25 tliat the original stands were cut cleanly, then permitted to grow again. Tliis explains why no attempt was made to work out the actual board foot yield of beecli-birch-maple stands. Data supplied by Robert Lyman, forester of the Gray Chemical Company, and collected from a natural even-aged 25-year-old beech- birch-mai)le stand in Potter County, showed a yield of 23 stacked coids of chemical-wood per acre. Similar stands of 45 and 80 years yielded, respectively, 45 and 79 stacked cords. These records tend to confiim data from the Department's permanent sami)le plots. Yield data based on the actual volumes of even-aged fully-stocked natui'al stands, as these are, represent the minimum yield to be ex- pected under a system of good forest tendance. BEECH-BIRCH-MAPLE PRODUCTS Products sui)plied by the beech-birch-maple, or northern liardwood forests, liave always been of lesser amount and value than products of the softwoods. In tlie past, these hardwood species contributed little to industry, such as general construction or box or paper making, which require wood in large quantities. Pennsylvania's huge wood reservoir is almost empty. The passing of the virgin forests results in an ever-diminishing production of botli softwoods and hardwoods. While the rate of cutting on both has been slowing uj), the pr()j)()rti()nate amounts of each class have been chang- ing i'aj)idly. In PH^'i about 75 j)er cent of tlie timber cut in Pennsyl-. vaii ;i was softwoods. In 1923, 64 per cent was hardwoods. By 1935, it is estimated, 75 per cent or more of the total cutting in the State ^vill he of hardwoods. Accordingly, it may be expected tliat hardwoods ^vill substantially supplant the softwoods where the latter once were considered essential to industry. Woods furnished by the beech-bir
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectforests, bookyear1923
