Bui. 453, U. S. Dept. of Agriculture. 



Plate II. 



Fig. 1.— Jack-Pine Seed Bed, Garden City, Kans. 



Foreground untreated. Background treated with sulphuric-acid solution before germination. 

 Stakes marked in inches. Xote the difference in height of the seedlings after the first season's 

 growth (F 3). 



Fig. 2.— Jack-Pine Seed Bed, Kansas Sandhills. 



Plat at left treated with one-fourth ounce and plat at center with three-eighths ounce of sulphuric 

 acid per square foot. Plat at right untreated. Xote the relative freedom from weeds in the 

 treated plats. The apparently thin stand of trees in the treated plats is due to the very small size 

 of the young seedlings of this" species of pine. Actual counts in these plats showed the stand to 

 be as dense as can be grown without subsequent overcrowding. Photographed by Stephen C. 

 Bruner (F 4). 



