18 resultados para Ecological agriculture institutional support
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Mode of access: Internet.
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CIS Microfiche Accession Numbers: CIS 82 S161-14
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Pt. 9 has subtitle: Hearing before the Committee on Agriculture and Forestry, United States Senate, Eighty-fourth Congress, second session, on the Veto message of the President on H.R. 12, the Agricultural act of 1946 (H. Doc. 380).
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Mode of access: Internet.
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This study documents marine ecological conditions at Rincon Island, located approximately 0.8 kilometer offshore between Ventura and Santa Barbara, California, in a depth of 14 meters. The island, which was constructed between 1957 and 1958 to serve as a permanent platform for oil and gas production, is particularly suitable for ecological study. Habitat features associated with the armor rock and concrete tetrapods surrounding the island support a 'microecosystem' which differs in biotic composition from surrounding natural bottom areas. A major part of the study was devoted to analysis of seasonal dynamics in biotic composition. Permanent transects extending from the high intertidal to natural bottom were established normal to each of the four cardinal sides of the island. All macrobiota were censused in duplicate 1-square meter quadrats along each transect during each of the four seasons. Data analysis indicated that many species exhibit significant variability in abundance from one season to the next. In general, the findings indicate a rich and varied fauna and flora associated with the high-relief solid substrate of Rincon Island which differs substantially from the more depauperate natural bottom habitats in the area.
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Mode of access: Internet.
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"Effective date: October 1, 1990. Supersedes edition effective January 1988 and 1989. This 1992 reprint version includes all previous page changes."
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Description based on: June 1959; title from caption.
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"Approved by USDA"
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"Approved by USDA"
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Updated occasionally by Amendments.
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Includes index to map sheets.
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Caption title.
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"January 1981"--P. 2.
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Literature cited: p. 19-20.