John S. Spencer, North Central Forest Experiment Station (Saint Paul, Minn.), United States. Forest Service
North Central Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1969 - Forests and forestry - 61 pages
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1967 Thousand acres annual growth Area of commercial Aspen-birch Balsam poplar Basswood Beech Black cherry Black oak Black walnut board feet breast height CM CM CM commercial forest land Cottonwood Cypress desirable trees diameter classes Forest Survey Units forest types growing stock growing-stock trees growing-stock volume Hard maple hardwoods Indiana International 1/4-inch rule loblolly pine Maple-beech-birch million cubic feet mortality of growing nonforest land Northern red oak Number Oak-gum-cypress Oak-hickory Oak-pine ownership classes poletimber trees sawtimber on commercial sawtimber trees Select red oak select white oaks short-log trees Shortleaf and loblolly Shortleaf pine Soft maple softwoods softwoods and hardwoods species and diameter species and Forest stock and sawtimber stock on commercial stocked with desirable stocked with growing-stock Sweetgum Sycamore Table Total softwoods Hardwoods trees on commercial Tupelo and blackgum Virginia pine volume of growing volume of sawtimber woods yellow pines Yellow-poplar