WITH THE HELP OF YIELD TABLES. 



105 



}000 



1 



,'T! 



*' 



IS 



V 



/ 



s 



TfT QTJAUTT 



10 io X1O- 



Fig. 36. Graphic representation of the Volume per acre of 40 different Woods and 

 their allotment to Three Quality Classes, according to Baur's method. 



II. DETERMINATION OF THE INCREMENT OF WOODS BY 

 MEANS OF YIELD TABLES. 



If yield tables are available, and it is desired to estimate the 

 increment of a wood forward or backward, it is necessary to 

 decide in the first place which of the quality classes of the 

 tables corresponds with the given wood ; in other words, it 

 must be ascertained to which quality class the wood belongs. 



The best way of doing this is to measure the volume of 

 a normal sample plot in the wood and compare it with the 



