EXERCISE A-16. 



TO STUDY THE NECESSITY FOR SOIL 

 DRAINAGE. 



Equipment: Two one-quart tin cans; a graduated 

 cylinder or bottle; a one-foot rule; several grains of corn; 

 a sample of loa-n soil. 



Method: Make eight holes in one can by driving a 

 nail through the bottom. Stand this can on blocks in a 

 saucer. Fill both cans with loam to within one inch of 

 the top and plant three grains of corn in each. Each day, 

 pour water upon the surface of the soil in the tight can 

 until it stands at the surface, noting the amount used each 

 time. At the same time add the same amount of water to 

 the other can, using the graduated bottle to determine 

 the amount added. As soon as the corn appears above the 

 surface measure its height every other day, recording the 

 average height of the three plants in each can. The height 

 may be regarded as the distance from the surface of the 

 soil to the tip of the uppermost leaf. 



From this exercise what do you conclude as to the 



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