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Cone crop fluctuations in Scots pine and Norway spruce

an investigation based on the cone counts carried out by the National forest survey in the years 1954-1962 and on the reports submitted by forest service rangers on the cone setting in the years 1909-1961

Hagner, Stig (1965). Cone crop fluctuations in Scots pine and Norway spruce. Stockholm: Predecessors to SLU > Royal School of Forestry, Sveriges lantbruksuniversitet. Studia forestalia Suecica ; 33
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Abstract

The present work reports on comparisons (figs. 3 and 5) between observations of the annual cone setting of Scots pine and Norway spruce in various parts of the country carried out by the State rangers (table 2) and observations made by the National Forest Survey (table 1). On the basis of these comparisons the long series of State ranger observations (1909-1953) has been regionally transformed to an absolute scale of values (table 3). Calculations have been made by means of these series with the purpose of elucidating how often a certain level of cone setting occurs in various parts of the country (fig. 6) and what range of variation that might occur in respect of number of years between cone crops of a size considered worthwhile to collect (table 4).

Authors/Creators:Hagner, Stig
Title:Cone crop fluctuations in Scots pine and Norway spruce
Subtitle:an investigation based on the cone counts carried out by the National forest survey in the years 1954-1962 and on the reports submitted by forest service rangers on the cone setting in the years 1909-1961
Series/Journal:Studia forestalia Suecica (0039-3150)
Year of publishing :1965
Number:33
Number of Pages:21
Place of Publication:Stockholm
Publisher:Skogshögskolan
ISSN:0039-3150
Language:English
Publication Type:Report
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Forestry
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:Scots pine, Norway spruce, cones, cone settings, National Forest Survey
URN:NBN:urn:nbn:se:slu:epsilon-e-23
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-23
ID Code:5876
Department:Predecessors to SLU > Royal School of Forestry
Deposited By: Elisabeth Lissén
Deposited On:15 Mar 2011 00:00
Metadata Last Modified:16 Dec 2015 12:37

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