Biometrical Letters Vol. 49(2), 2012, pp. 121-134
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APPLICATION OF LONGITUDINAL ANALYSIS TO THE ANALYSIS OF HEIGHT INCREMENT OF PINE STANDS – SIMULATED DATA
Bogna Zawieja Department of Mathematical and Statistical Methods, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland, bogna13@up.poznan.pl |
One of the most important characteristics in determining the dendrometrical properties of a stand is the annual height increment of the trees. On the basis of these increments, natural phases of the trees’ life are defined. In the present study the data concern the height increments of the main trunk of 25-year-old Scots pine, as well as simulated data. Our research deals with the application of longitudinal data analysis. This analysis is usually used when measurements are taken at the same treatments at different time points. The calculations performed provide answers to the question of which annual height increments differ.
contrast, height increment, longitudinal data analysis, Scots pine (Pinus sylvestris)
