Weather and Tree Growth Associated with White Fir Mortality Caused by Fir Engraver and Roundheaded Fir Borer
Weather and Tree Growth Associated with White Fir Mortality Caused by Fir Engraver and Roundheaded Fir Borer

Author: Craig D. Whitesell

Publisher:

Published: 1974

Total Pages: 182

ISBN-13:

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Ohia forest decline-its severity and rate of spread-was studied by aerial photographic techniques on a 197,000-acre (80,000-ha) portion of the island of Hawaii. In 1954, only 300 acres (121 ha) showed signs of severe decline; by 1972, the acreage of severely affected forest had increased to 85,200 acres (34,480 ha). Rate of decline and current severity were related to mean annual precipitation and to elevation. The epidemic is continuing. Some forests on other Hawaiian islands also display decline symptoms.

Growth and Mortality After Regeneration Cuttings in Old-growth Redwood
Growth and Mortality After Regeneration Cuttings in Old-growth Redwood

Author: Kenneth N. Boe

Publisher:

Published: 1974

Total Pages: 13

ISBN-13:

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To convert old-growth redwood (Sequoia sempervirens) to younger managed stands, three types of regeneration cuttings are being tried at the Redwood Experimental Forest, northern California: clearcutting, shelterwood, and selection cutting. Logging mortality was heavy for all tree sizes and greatest where the heaviest cuts were made. The large size of a negative net growth of sawtimber on selection cuttings is attributed to mortality during a 10-year postlogging period. Net growth was slightly negative on shelterwood cuttings. By the end of the 10 years, basal area growth for saplings on all cuttings was significant. Because of well-stocked reproduction, growth is expected to accelerate - especially on clearcuttings and to a lesser extent on shelterwood cuttings.