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like the potato. In fact, deep plowing serves the same 

 valuable purpose for all plants, not only in giving more 

 and better root feeding space, but in catching and hold- 

 ing more of the rainfall. We have already learned that 

 water exists in the soil both as underground water and 



DEEP 1 LC 



as capillary water, and that the water which supplies 

 the roots of the plants is the capillary water drawn up 

 from the underground water below. Now unless the 

 ground is deeply plowed, there is less rainfall caught 

 to supply this underground water, and hence less to 

 supply by capillarity to the plant roots. 

 Surface cultivation. If the deep plowing catches 



