150 DETETtMTNATION OF THE REKTAT, OF FORESTS. 



2. ncntnl of ihr Foreai. 



The rental of the forest is equal to the net return yielded by 

 the forest (soil plus growing stock)- In the case of the 

 annual working, the forest rental is equal to — 



B,= Y, + 1\, + . . . + 7; - (r + r X e). 



