PLATE II 



A. — Oats on soil A. The soil pots received the same fertilizers as in pots showTi in 

 Plate 9, series A. 



B. — Oats on soil B. The soil pots received the same fertilizers as in pots shown in 

 Plate 9, series A. 



C. — Oats on soil C. The soil pots received the same fertilizers as in pots shown in 

 Plate 9, series A. 



