Bui. 1105, U. S. Dept. of Agriculture 



PLATE IV 



Fig. I. — Good Reproduction of Several Age-Classes on Stony Clay 

 Soil. The Grass Here is Mainly Muhlenbergia Montana. This 

 Association of Soil and Grass Usually Indicates a Favorable Site 

 FOR Reproduction of Western Yellow Pine. 



Fig. 2. — Good Reproduction on Rocky Slope; None on Clay Flat in 

 Foreground. This Relationship Between the Two Sites Is Char- 

 acteristic. 



