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Washington's 1970 timber harvest of 6.46 billion board feet was 7.8 percent below the near record harvest of 7 billion board feet established in 1969. Timber harvests on all public lands declined 13 percent with a 9.0-percent reduction in western Washington and a 22.9-percent drop in eastern Washington. State lands led the decline in public production with a 142-million-board-foot drop from 1969 (down 19.1 percent) followed by the National Forests with a 140.8-million-boardfoot drop (down 9.3 percent). Production on Indian lands declined 52.6 million board feet (down 12.5 percent) during...

The 1970 Oregon timber harvest of 7.98 billion board feet was the lowest recorded since the recession year of 1961 when 7.41 billion board feet of timber was produced. The 1970 log production figure was 12.8 percent below the 1969 harvest, the second consecutive year of declining production in Oregon.

A study conducted during 1969-70 in Oregon, Washington, and California indicates that the average net volume of logging residues ranged from 325 to 3,156 cubic feet per acre. The highest volume was on National Forests in the Douglas-fir region, which averaged 2.5 times greater than private lands. The lowest volumes of residue were found in the ponderosa pine region where both private and public lands averaged between 325 and 375 cubic feet per acre. Private lands in California averaged 1,558 cubic feet per acre, while National Forests averaged 1,206 cubic feet per acre. The total net...

A lodgepole pine levels-of-growing-stock study showed that trees growing at lower stand densities had longer crowns and grew more rapidly in diameter but did not grow significantly faster in height. Gross cubic-volume increment decreased with decreasing stand density. The decrease was small per unit of density at the higher densities but much greater at the lower densities. However, at the lower densities more wood is being added to the larger trees that can reach usable size. Soil moisture withdrawal was reduced at the lower stand densities. Understory vegetation did not develop strongly...

As the need for intensive management of timberlands becomes more evident, the effect of initial plantation spacing and/or early thinning on subsequent stand development is of increasing interest and importance to the land manager. Douglas-fir stands planted in 1925 at Wind River, near Carson, Wash., have been observed periodically for over 40 years and provide an increasingly valuable record of benefits derived from fairly wide, uniform spacing.

In the Pacific Northwest, as in many other parts of the country, burning is the standard method for disposal of undesirable waste including logging debris and agricultural residue. About 81,000 hectares (200,000 acres) of logging slash are burned annually west of the Cascade Range in the States of Washington and Oregon. In addition, 101,000 hectares (250,000 acres) of grasslands are burned in Oregon. Many other forms of residue are also disposed of by burning.

Soils derived from two widely distributed parent materials in central Washington were examined periodically during 1968-69 for physical and chemical properties. Basalt soils showed significant periodic variation in cation exchange capacity, pH, and Na and K contents. In sandstone soils, cation exchange capacity and Ca, Na, and K contents varied significantly among sampling dates. Although certain physical properties showed definite trends, none were statistically significant. These results indicate that, where sampling dates vary, periodic variation in certain chemical properties of these...

The relationship of needle surface area to needle volume for ponderosa and lodgepole pine seedlings is presented.

The 1969 Oregon timber harvest of 9.15 billion board feet was 6.1 percent below the 1968 16-year peak of 9.74 billion board feet. In western Oregon, the 1969 harvest was down 9.1 percent with public production and private production off 10.8 and 7.2 percent, respectively. By contrast, log harvest in eastern Oregon rose 5 percent, with private production up 13.2 percent and public up 2.5 percent.

California's timberlands and forest products industries have played an important part in the growth of California's economy. Discovery of gold at the site of the first waterpowered sawmill in interior California triggered the gold rush of 1848, an event that led the California Territory into booming growth and statehood. Following that discovery, the lumber industry grew in inland California to meet demand for timbers and lumber in the mines and communities of the Mother Lode in California and the Comstock Lode in Nevada. On the coast, the lumber industry developed in response to needs for...