Listar por autor "Sheffield, Raymond M."
Mostrando ítems 1-2 de 2
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East Texas Forests, 2003
(U.S. Dept. of Agriculture, Forest Service, Southern Research Station, 2008)Forest land covers 12.1 million acres in east Texas, or about 57 percent of the land area. The majority of forests, 11.9 million acres, are classed as timberland. The 2003 timberland area is ... -
Incidence and impact of oak decline in Western Virginia, 1986
(USDA Forest Service. Southeastern Forest Experiment Station, 1991)Data collected in consecutive forest surveys of Virginia show that losses to oak decline from 1977-1986 were between 7.4 and 13.5 million cubic feet per year in the Northern Piedmont and ...
