Land Drainage and vSoil Efficiency 1837 



4. Describe four materials that may be used for drainage purposes, and 

 point out the advantages and disadvantages of each. 



5. Does your farm or your neighborhood need more underdrainage ? 

 What are the indications of such need? 



6. Enimierate and explain briefly the indications of poor drainage of 

 the soil. • • 



7. State briefly any personal observation you may have made of the 

 effects of underdrainage, enumerating benefits. 



