DRAINAGE AND VENTILATION 55 



QUESTIONS 



1. Estimate the amount of swamp land east of the 100th meridian in the 

 United States. 



2. Why is it impossible to grow ordinary crops on wet swampy lands? 



3. How may such lands be reclaimed from waste ? 



4. Discuss the advantages of drainage. 



5. Discuss methods of drainage. 



6. What is meant by soil ventilation ? 



7. Discuss underventilated soils. 



8. Discuss overventilation of soils. 



9. What can you say of the damage done to crops by high winds in 

 some of the western States? 



10. What remedy is suggested for this danger? 



REFERENCES 



Farm Drainage, Judge French. 



Drainage for Profit, George E. Waring. 



Drainage of Farm Lands, Farmers' Bulletin No. 187, 



