SOIL. 



95 



on account of the removal of water by the preceding crop. 

 This fact is illustrated in the table below. 



Plants Take Water From the Soil. 



Two Ways of Growing Corn. 



Plot at right received ordinary cultivation, and yielded 64 bushels to the acre. 

 Plot at left received no cultivation and yielded 4 bushels an acre. 



272. How many tons of water in the two feet of 

 ground not planted ? 



273. How many in the ground in clover? 



274. On this basis how many tons of water per acre 

 were removed by the growing clover crops ? 



