(24) 



EXERCISE 6 (Continued) 

 Apparent Specific Gravity 



Weight of equal volume of water. 



QUESTIONS 



1. From the result secured calculate the weight per cubic foot of each of 



the soils. 



2. Finally calculate the weight per acre foot. 



3. What is meant by the volume-weight of soil? 



4. Give a definition of specific gravity. 



5. What is the difference between apparent specific gravity and real specific 



gravity? 



6. What is meant by porosity? 



7. What is the porosity of the average soil? 



8. State clearly the necessity for pore space in soil. 



9. What influence has (a) organic matter, (6) texture, 



the porosity of a soil? Upon the weight of a soil? 



10. Which is heavier, a coarse or a fine soil? Why? 



11. What does this exercise show concerning the comparative weight and 



apparent specific gravity of land recently plowed and land unplowed? 



(c) structure upon 

 Why? 



