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Author : Jay Russell Bentley
Publisher : Unknown
Page : 6 pages
File Size : 41,8 Mb
Release : 1971
Category : Brush
ISBN : MINN:31951D02995645V
Author : Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.)
Publisher : Unknown
Page : 218 pages
File Size : 41,8 Mb
Release : 1970
Category : Forests and forestry
ISBN : CHI:092024210
Author : Anonim
Publisher : Unknown
Page : 788 pages
File Size : 50,7 Mb
Release : 1966
Category : Forests and forestry
ISBN : UOM:39015001293292
Author : Philip M. McDonald
Publisher : Unknown
Page : 16 pages
File Size : 42,8 Mb
Release : 1990
Category : Forest management
ISBN : MINN:31951D029884080
Foresters often need information on the cost effectiveness of manual and chemical release treatments for individual and combined species in young mixed-shrub communities. A study in northern Califomia evaluated five manual and chemical treatments and their effect on several shrubs and grasses. Treatments were grubbing at age 1 to 2- and 4 ft (0.6- and 1.2-m) radii, regrubbing and expanding the 2-ft radii to 4 ft, regrubbing and expanding the 4-ft radii to 6 A (1.8 m) at age 4, and applying Velpar herbicide to the entire plot at age 2. Five years after initial manual release and 4 years after chemical release, ponderosa pine (Pinus ponderosa Dougl. ex Laws. var. ponderosa) stem caliper at 12 in. (30 cm) above mean ground line differed significantly between Velpar and the untreated control, 2-ft radius, 4-ft radius, and 2-ft radius expanded to 4 ft. Expanding the radius from 4 to 6 feet provided a pine stem caliper that differed significantly from that in the control, and the 2-ft and 4-ft radii treatments. Additional analyses with ponderosa pine seedling height also indicated significant differences among treatmenu that were generally similar to those above. Differences among the six treatments, which are presented in 15 comparisons of stem caliper and treatment production rates, provide forest managers with growth and cost comparisons, and should aid them in selecting the release treatment best suited to their particular situation.
Author : Ronald E. Stewart
Publisher : Unknown
Page : 422 pages
File Size : 55,6 Mb
Release : 1984
Category : Forest ecology
ISBN : MINN:31951D02889310J
Author : Anonim
Publisher : Unknown
Page : 586 pages
File Size : 54,5 Mb
Release : 1984
Category : Forests and forestry
ISBN : UOM:39015013582740
Author : William W. Oliver
Publisher : Unknown
Page : 8 pages
File Size : 41,7 Mb
Release : 1979
Category : Ponderosa pine
ISBN : MINN:31951D029957312
Competition between trees in brush-free plots began during the eighth year for trees spaced 6 by 6 feet and during the tenth year for trees spaced 9 by 9 feet.
Author : William W. Oliver
Publisher : Unknown
Page : 12 pages
File Size : 55,7 Mb
Release : 1984
Category : Forest thinning
ISBN : MINN:31951D02889016J
Author : Philip M. McDonald
Publisher : Unknown
Page : 796 pages
File Size : 55,5 Mb
Release : 1980
Category : Clearcutting
ISBN : STANFORD:36105117927447
In a 1964-1967 study on the Challenge Experimental Forest, seedfall was evaluated in 2-, 5-, and 10-acre circular clearcuttings. During the 4 years, 10 seed crops, ranging from light to bumper, were produced by ponderosa pine. white fir, Douglas-fir, and incense cedar. Seedfall ranged from 76 to 40,691 sound seed per acre (188 to 100,547/ha) for a single species in a given year. From 89 to 100 percent of each species' seed fell within an area 1 1/2 times the height of the average dominant tree. Overall, seed distribution was highly variable.
Author : Robert F. Powers,Grant D. Jackson
Publisher : Unknown
Page : 18 pages
File Size : 53,8 Mb
Release : 1978
Category : Fertilizers
ISBN : MINN:31951D02964840K
First-year results of fertilization in a young ponderosa pine plantation on two contrasting soils were analyzed. Trees testing low in foliar nitrogen responded strongly to fertilization where brush had been removed, but failed to respond if brush remained. Height growth was doubled by certain treatment combinations on the less fertile Mariposa soil, but was not influenced by treatment on the more fertile Cohasset. Brush removal increased needle weight for trees on both soils. Increases in foliar biomass and nitrogen content of trees on treated plots suggest that rapid growth rates will continue.
Author : Ole Terrence Helgerson
Publisher : Unknown
Page : 96 pages
File Size : 52,8 Mb
Release : 1986
Category : Forest insects
ISBN : MINN:31951D01098287F
Author : United States. Congress. House. Committee on Agriculture. Subcommittee on Forests
Publisher : Unknown
Page : 160 pages
File Size : 49,5 Mb
Release : 1980
Category : Forests and forestry
ISBN : MINN:31951D00285651Z
Of Pacific Northwest studies that report effects of vegetation management on tree growth -- Polarization of the herbicide problem -- Long-term field studies.
Author : Henry A. Wright,Arthur W. Bailey
Publisher : John Wiley & Sons
Page : 546 pages
File Size : 52,5 Mb
Release : 1982-03-18
Category : Science
ISBN : 0471090336
Regional Silviculture of the United States, 2nd Edition John W. Barrett This is the only regional silviculture text now on the market. It assesses the significant biological, physical, and economic qualities of forest regions in the continental U.S., and their effect on silviculture practices. The first chapter provides an overview of the forests of the U.S. and introduces the topic of social and institutional constraints on silviculture. Subsequent chapters each deal with a specific forest region, are written by a person intimately acquainted with the locality, and follow a regular outline to provide cohesion and facilitate regional comparisons. 1980 551 pp. Forest Ecology, 3rd Edition Stephen H. Spurr and Burton V. Barnes The growing interest and literature in this field created a need for a fresh updating of this classic text. It remains a comprehensive yet highly readable account of real world forests, including ecological aspects of successful forest management. Broad coverage embraces genetics and variation, environmental factors, site, community relations, ecosystem studies, glacial forest history, post-settlement history, compostition and succession. 1980 687 pp. Wildlife Biology, 2nd Edition Raymond F. Dasmann This updated and revised edition of the standard introductory text brings together the principles of ecology and population biology and the practice of wildlife conservation and management. It presents basic information on the value and present status of wild animal life, including a history of human relationships with and attitudes toward wildlife. Examines wildlife within the context of ecosystems, indicating why single-species approaches to conservation and management often fail. 1981 212 pp.
Author : United States. Congress. House. Committee on Agriculture
Publisher : Unknown
Page : 160 pages
File Size : 41,7 Mb
Release : 1980
Category : Forests and forestry
ISBN : UCR:31210024742643
Author : Anonim
Publisher : Unknown
Page : 372 pages
File Size : 52,9 Mb
Release : 1983
Category : Brush
ISBN : UCD:31175028875790
