CONTENTS 



Page. 



Introduction 7 



Measurement of standing- trees 8 



Heiglit measuring 8 



Measurement of diameter 11 



Measurement of volume 12 



Measurement of volume of a standing tree by employing the factor of shape 14 



Measurement of felled trees 15 



Heiglit and diameter measuring 15 



Measurement of volume 16 



Measurement of a stand of trees or growing stock of a forest 18 



Determination of tbe grov^ing stock by extending the measurements over 



the whole forest : ., 18 



Determination of volume by means of an average sample tree 20 



Calculation for average sample tree 21 



Selection and measurement of sample trees 21 



Calculation of the total volume of the stand 22 



Determining volume by sample trees of diameter classes 24 



Determining volume by felling and measuring a proportional number of 



sample trees for each diameter 25 



Determination of the growing stock by means of sample areas 27 



How to determine the rate of growth 28 



Determining the accretion of a standing tree 31 



Mass accretion with simple interest 32 



Mass accretion with compound interest 34 



Determining the accretion of a felled tree 35 



Determining the accretion of a forest 36 



Table of circles for diameters of 1 to 60 inches 37 



Table of volumes of cylinders and of the sum of circles for diameters of 



1 to48 inches 38-39 



Pressler's table 40 



A method of investigating timber growth 40 



Field work 43 



Forest conditions of station 43 



Aspect 44 



Soil and drainage conditions 44 



Physical properties of soil 46 



Subsoil 48 



Soil cover 48 



Forest conditions of sample area 48 



Density of forest 48 



Acre-yield measurement 49 



Deduced results 49 



The measuring of felled trees for analysis 49 



Office work 51 



Tabulation of measured trees 51 



Analysis 52 



Height growth 56 



Diameter growth 58 



Volume growth 58 



Appendix 62 



5 



