METHOD OF DETERMINING GROWTH OF TREES WITH ANNUAL RINGS

Stump analysis: analysis of a stump cross section by measuring annual rings in order to estimate the age of the tree and it's past rate of diameter and basal area growth.

Objectives:To find out age/diameter relationship to determine rotation age.
It also shows the influence of external factors affecting single tree or the stand on the rate of diameter increment of trees or stand by correlating rate of diameter increment with effects of the factors involved.

Stem analysis: analysis of a complete stem by measuring annual rings on a number of cross sections at different heights in order to determine its past rates of growth.

Objectives: to determine age-diameter,age-height and age-volume relations throughout the life of the tree analysed.
To access the average rate of diameter, height and volume increment.

Types:
Partial stem analysis; confined to one position of the stem.
Complete stem analysis; involves a number of positions along the stem and permits diameter, height and volume growth.
Instrument used is pressler's borer.
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