BAURS METHOD. 



103 



the same quality class. By drawing a mean curve through 

 each strip, the mean volume curve for the quality is obtained, 

 from which the volume tahle is prepared for successive years. 

 In a similar way mean curves for the height, basal area and 

 number of trees are constructed for each quality class. The 

 method is of easy application, and it yields good results. 



Instead of limiting the quality classes in the manner described 

 above, the average quantity of final yield which corresponds 

 to each quality class can be once for all determined. Thus 

 in Germany it has been decided to consider that normal Scotch 

 pine woods, which contain (in round numbers) at an age of 

 100 years : 



10,000 cubic feet per acre, shall be considered as I. quality 



7 ,yuu ,, ,, ,, ,, j-i. 5, 



6,000 III. 



4,300 IV. 



2,900 ,, ,, ,, ,, V. ,, 



EXAMPLE OF PREPARING YIELD TABLES ACCORDING TO BAUR'S METHOD. 



Scotch Pine : 3 Quality Classes to be distinguished. 

 Woods Measured as follows : 



