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Some Effects of Thinning and Fertilization on Ponderosa Pine and Understory Vegetation

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Abstract:

Ponderosa pine (Pinus ponderosa Laws.) in northern California showed increased growth from both thinning and fertilizing. Trees were thinned in 1952-1953 and fertilizer was applied in 1958-1960. The greatest absolute increase in basal area of trees occurred on thinned-fertilized plots, followed by those on the fertilized-only plots, thinned-only plots, and untreated plots. On a percentage-increase basis, the trees on the thinned-only plots showed a greater increase in basal area than did those on the fertilized-only plots. The understory vegetation increased with thinning of trees. Fertilizing increased understory most where the thinning was heaviest and very little where there was no thinning. The relationship between forest growth and pine management is discussed.

Document Type: Journal Article

Affiliations: Professor of Forestry and Ecology, Univ. of California, Berkeley

Publication date: 1970-11-01

More about this publication?
  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.

    2015 Impact Factor: 1.476
    Ranking: 22 of 66 in forestry

    Average time from submission to first decision: 39.6 days*
    June 1, 2016 to Feb. 28, 2017

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