GROWTH OF OAK IN THE OZARKS 



19 



saplings. In a few places there was a fair growth of weeds and 

 grass but on most of the area the bare rocky soil was exposed. 

 The number and size of trees is given in Table XII. 



At the bottom of each table is given the yield of the sample 

 acre in cords. These are the figures obtained by stacking the cut 

 wood and measuring the dimension of the pile. It is instructive 

 to compare this observed volume with the volume as computed 

 from the tally of the trees on each acre by the use of the volume 

 tables. 



This table furnished us with a criterion of the accuracy with 

 which the volume tables already computed can be applied. The 

 average error on these four plots is 3 per cent and this is consid- 



TABLE XI. TALLY OF TREES ON PLOT III. 



Grand Total . . . . 80 Trees. 



Yield.. ..20.87 Cords. 



