Bui. 299, U. S. Dept. of Agriculture, 



Plate XVI. 



Fig. 1. — Before thinning, crowns were crowded. 



Fig. 2.— After thinning, crowns were free. Crowns should be at least this distance 

 apart after thinning to secure good development of the trees left. 



LOOKING UP 



INTO THE CROWNS OF A TWENTY-YEAR-OLD 

 WHITE ASH STAND. 



