Biometrical Letters vol. 47(2), 2010, pp. 119-127
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LONGITUDINAL ANALYSIS APPLIED TO THE ANALYSIS OF HEIGHT INCREMENT OF PINE STANDS Małgorzata Graczyk1, Katarzyna Kaźmierczak2, Bogna Zawieja1 1Department of Mathematical and Statistical Methods, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland, magra@up.poznan.pl, bogna13@up.poznan.pl 2Department of Forest Management, Poznań University of Life Sciences, Wojska Polskiego 71C, 60-625 Poznań, Poland, kasiakdendro@wp.pl |
One of the most important characteristics in the determination of dendrometrical properties of a stand is the annual increments in the height of the trees. On the basis of these increments, the natural phases of tree life are detected. In the case considered here, the data relate to height increments of the main trunk of 25-year-old Scots pine trees. Our research deals with the application of longitudinal data analysis. Usually this analysis is used when measurements are taken for the same treatments at different time points. Calculation provides an answer to the question of which annual height increments differ. Based on the research we can conclude that the data are from the final senile phase.
contrast, height increment, longitudinal data analysis, Scots pine (Pinus sylvestris)
