Bui. 86, Forest Service, U. S. Dept. of Agriculture. 



PLATE VI. 



FIQ. 1.-A NORTH-SOUTH Row HAS THE ADVANTAGE OF GETTING LIGHT FROM THE 

 SIDES; DENSE BRANCHING, ALMOST TO THE GROUND. 



FIG. 2.-AN EAST-WEST Row RECEIVES LIGHT ONLY FROM ABOVE; LOWER BRANCHES 



SHADED OFF. 



