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Management for timber crops is feasible on about 12,000 acres of forest land in American Samoa. Another 10,000 acres of forest land are on such steep topography that management for protection of watershed values should be paramount . Excluding such critical watersheds the forests hold 50 million board feet or more of sawtimber in a great variety of tree species. Some species have good growth form and wood quality. Little is known about the wood qualities of most.

Four processes are identified as determining the initial interception of falling snow by forest during storms: delivery of snow particles from the airstream to the forest; true throughfall of particles to the forest floor; impaction and adhesion of particles to foliage and branches; and cohesion of particles into masses of snow. Delivery and impaction processes seem amenable to aero-dynamic analysis; adhesion of particles and cohesion both depend on air temperature and foliage roughness. Promising leads for laboratory and field research on aerodynamic and thermodynamic factors influencing...

A wide range in quantitative composition of the wood oleoresin monoterpenes was found among 64 ponderosa pines in the central Sierra Nevada by gas chromatographic analysis. An inverse relationship was found in the amount of β-pinene and Δ3-carene. Practically no difference in composition could be associated with (a) type of sample preparation and analysis, (b) position on the trunk of the tree where the oleoresin was obtained, (c) time within a season, between seasons, and between years, (d) time of flow of oleoresin from a wound, and (e) storage time of prepared samples.

The prevalence and identity of 72 pathogens occurring on Pinus radiate D. Don are described against a brief background of the native host and its environment. Records of pathogens in California herbaria, pathology notes is Forest Service files, findings of recent surveys, and publications provide the basis for an index of these pathogens. An appendix lists 86 additional pathogens on exotic Monterey pine. For each pathogen the known world-wide distribution is given.

Maps contain information basic to land management planning. By transforming conventional map symbols into numbers which are punched into cards, the land manager can have a computer assemble and display information required for a specific job. He can let a computer select information from several maps, combine it with such nonmap data as treatment cost or benefit per acre, and prepare overlays and tabulations. The report describes specific and potential uses for the system and includes cost estimates.

Abstract - The quantity of summer soil moisture lost from logged forest openings was related to the length of time since the creation of the opening, in the subalpine forest zone of the Sierra Nevada west side, near the Central Sierra Snow Laboratory, California, at an elevation of 6000 to 7000 feet. Soil moisture depletion was measured in forest openings which were created in 1959, 1955, 1950, and 1948, and in the forest surrounding these openings. Soil moisture was found to be uniformly near field capacity in all plots in early June. Later soil moisture was lost most rapidly from the...

Summarizes available information on Acacia koa (Gray), including habitat conditions, life history, special features, races, and related species. Cites 46 articles.

These guidelines were initially prepared as part of the FUEL-BREAK Program by Jay R. Bentley, Craig C. Chandler, and Verdie E. White, of the Pacific Southwest Forest and Range Experiment Station, from suggestions by field personnel. The guidelines were reviewed and revised by a committee as follows: Robert H. Blanford, Elmer Chambers, and Len Chatten of the California Division of Forestry; Harvey T. Anderson and R. M, Van Wagner of the Los Angeles County Fire Department; and Lynn R. Biddison and Lloyd R, Britton of the U.S. Forest Service. They were reviewed again in February, 1963 by J.R....

A fuel-break is a wide strip or block of land on which native brush fuels have been reduced or eliminated to facilitate fire control. Brush removal creates a plant vacuum which should be filled rapidly with plants that will protect the soil against erosion, produce lower fuel volume than native chaparral, and possibly provide grazing for wild or domesticated animals. Fuel-breaks are usually constructed along ridge tops, but also along mountain roads, and valley or canyon bottoms. Topography may be steep and irregular, soils shallow and course; rocks, brush, and stumps may cover much of the...