Grade. 

 Date. . 



(28) EXERCISE 8 



Heavy and Light Soils 

 Purpose. — To find why certain soils are called "heavy" and others "light." 



PLAN 



1. Fill a soil tube or tin can with dry sand, pack well, refill, strike off with 



straight edge and weigh. Empty the vessel and weigh it while empty. 

 Record results in the following table. 



2. In like manner determine the weights of the same volume of several other 



soils, such as black humus soil, heavy clay, and medium loam. 



Results 



Wt- soil and tube 



QUESTIONS 



1. Arrange the soils in the order of their actual weights. 



2. Why does the farmer call clay soils heavy soils? 



3. Are the so-called heavy soils really as heavy as sandy soils? 



4. Why are sandy soils spoken of as light soils? 



5. Would humus added to heavy soils make them plow easily? 



6. What effect would sand have on clay soils in this regard? 



