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



PLATE VII. 



FIG. 1. CORN TO THE NORTH OF A COTTONWOOD GROVE is BADLY DAMAGED BY SHADE 

 IN A FEW Rows ADJACENT TO THE TREES. 



FIG. 2. ON THE EAST OF COTTONWOOD THE SHADING EFFECT is NOT so MARKED, BUT 

 is FELT OVER A WIDE AREA. 



