122 ROOT DEVELOPMENT IN THE GRASSLAND FORMATION. 



Table 10. — Development of rye, oats, and wheat at various stations in the grassland formation . 



1 "Hardpan" at 3.6 feet. 



2 "Hardpan" at 2.5 feet. 



3 No "hardpan" found. 



4 "Hardpan" at 2.3 feet. 

 6 "Hardpan" at 3.5 feet. 

 6 "Hardpan" at 1.6 feet. 



7 "Hardpan" at 1.9 feet. 



8 "Hardpan" at 1.8 feet. 



