A Study of the Shape of Cross Section of Stems and the Accuracy of Calliper Measurement

Abstract

The need for a statistical appraisal of the present methods in selection and processing of sample plots data and in particular of assessing statistically the precision of the common mensurational methods in forestry is pointed out. Simple methods of studying the shape of cross sections of stems are suggested. Techniques for estimating the bias. and precision in the common procedures of callipered diameters in estimating the sectional area are given and indicative results obtained for four timber species.