PLATE 9 



A. — Clover on soil A. The top row, reading from left to right, shows the soil pots 

 which received the following fertilizers: 



Pot I, calcium sulphate, sodium nitrate; pot 2, sodium sulphate, sodium nitrate; 

 pot 3, sulphur, sodium nitrate, calcium carbonate; pot 4, sodium nitrate; pot 5, 

 sodium nitrate, calcium carbonate; pot 6, no fertilizer. 



The lower row, reading from left to right, shows the sand pots which received the 

 follo^ving fertilizers: 



Pot 7, calcium sulphate, sodium nitrate; pot 8, sodium sulphate, sodium nitrate; 

 pot 9, sulphur, calcium carbonate, sodium nitrate; pot 10, sodium nitrate. 



B. — Clover on soil B. The top row, reading from left to right, shows the soil pots 

 which received the same fertilizers as in series A above. The lower row, reading from 

 left to right, shows the sand pots which received the same fertilizers as in series A. 



C. — Clover on soil C. The top row, reading from left to right, shows the soil pots 

 which received the same fertilizers as in series A. The lower row, reading from left 

 to right, shows the sand pots which received the same fertilizers as in series A. 



