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Site index estimation by means of site properties

Scots pine and Norway spruce in Sweden

Hägglund, Björn and Lundmark, Jan-Erik (1977). Site index estimation by means of site properties. Technical Report. Stockholm: UNSPECIFIED, Sveriges lantbruksuniversitet. Studia forestalia Suecica ; 138

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The aim of this study is to establish functional relationships between site index (dominant height at a total age of 100 years) and site properties, which can be used for predicting site index in forestry. The functions are derived from a mathematical growth model, assuming that the effects of different growth factors interact in a multiplicative way. Data selected from the National Forest Survey and comprising more than 3 000 plots are used to estimate the parameters of the model by means of regression analysis. In total, 10 functions are constructed-6 for Scots pine and 4 for Norway spruce. These functions are checked by an examination of residuals and by a comparison with data not used for constructing the functions. The checks gave fairly satisfactory results, and the functions seem suitable for their purpose. However, site indices predicted have an accuracy considerably lower than when using site index curves in stands suitable for that method. Hence, the use of the functions should be restricted to situations where site index curves cannot be applied.

Authors/Creators:Hägglund, Björn and Lundmark, Jan-Erik
Title:Site index estimation by means of site properties
Subtitle:Scots pine and Norway spruce in Sweden
Series Name/Journal:Studia forestalia Suecica
Year of publishing :1977
Number of Pages:38
Place of Publication:Stockholm
ISBN for printed version:91-38-03737-8
Publication Type:Report
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Forestry
Keywords:site index, Scots pine, Norway spruce, growth model, regression analysis
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ID Code:5587
Faculty:S - Faculty of Forest Sciences
Deposited By: Elisabeth Lissén
Deposited On:19 Jan 2011 00:00
Metadata Last Modified:21 Dec 2015 09:58

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