EXERCISE A-26. TO SHOW THE EFFECT OF A MULCH 

 IN PREVENTING THE LOSS OF MOISTURE AT 

 THE SURFACE OF THE SOIL. 



Equipment: Balance; sample of soil ; dry sand or dust; 

 dipper; shallow tray. 



Fig. 23. — Home-made Balance Used to Show the Effect of a Dry 



Earth Mulch. 



Method: Fill one can to within one inch of the top 

 with moist soil and the other can to within two inches of 

 the top with the same soil. Pour dry sand or dust over the 



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