BLACK WALNUT: ITS GROWTH AND MANAGEMENT. 



15 



the supply during that period, although the situation may be some- 

 what ameliorated by the careful management and conservation of re- 

 maining stands. At the end of this period the remaining supply will 

 begin to decrease unless active steps are now taken to secure an ade- 

 quate replacement by extensive planting or by forest management to 

 secure natural regeneration. The upper Ohio Valley and Appalach- 

 ian region is too limited to maintain a very large output. There is 

 absolutely no need, however, of our sacrificing a national asset like 

 black walnut, which may be perpetuated if the proper action is taken. 



60 ft 



Pig. 2. — Open-grown black walnut tree. 



DESCRIPTION OF THE TREE. 



SIZE AND FORM. 



Black walnut is naturally a large tree, and, if it were given time 

 and a favorable site, it would grow to magnificent proportions. At 

 present, however, it is a rare thing to see trees over 30 inches in diam- 

 eter, breast high, and these are usually open grown with broad- 

 spreading crowns and short trunks. Logs as large as 77 inches at the 



