EXERCISE 10 (Continced) 

 Results 



(33) 



12. Compute in tons the amount of water held by each mixture for an acre 

 furrow slice, assuming such an amount to weigh 2,000,000 pounds. 



QITESTIONS 



1. What is the efTect of organic matter upon the structure of the soil and 



upon its ability to retain moisture? 



2. Why is some of the water which percolated through of a straw color? 



3. What does this water contain and what harmful farm practice does it 



suggest? 



4. How much manure should be applied per acre? 



5. Which is the better farm practice, to apply 10 tons of manure per acre 



every 4 years or 20 tons every 8 years? 



6. Give five distinct benefits from the use of manure. 



7. AVhy is manure beneficial on muck land? 



8. State clearly the best method of handling muck for the purpose of improv- 



ing a sandy soil. (Brook's Agriculture, Vol. 1, pp. 90, 91.) 



9. How do manure and muck differ in their power to improve the soil? 



