QUESTIONS. I03 



log. What other mechanical means of improvement are men- 

 tioned ? What is the great object to be accomplished ? What 

 feeling generally prevails in a new country ? 



no. Is thorough cultivation always proper? 



CHAPTER VII. 



THE USE OF MANURES, OR FERTILIZERS. 



in. Upon what principles is the use of fertilizers based ? 



112. When should fertilizers be used ? 



113. What produces exhaustion ? How much potash is re- 

 moved in a ton of red-clover hay ? How much phosphoric acid ? 



114. How much phosphoric acid is contained in an ox 

 weighing 1,000 pounds ? How much potash in 1,000 pounds 

 of unwashed wool ? 



115. Upon what does the rapidity of exhaustion depend ? Is 

 it sure to follow without restoration ? 



116. How many kinds of fertilizers are there ? 



117. Why is a decaying plant a good fertilizer ? How do 

 vegetable substances benefit land ? 



118. How do cornstalks serve as a fertilizer? 



119. What is said of cotton-seed ? Leaves ? 



120. What two important constituents are found in cotton- 

 seed ? How much mineral matter in a bale of lint ? In cot- 

 ton-seed from a bale ? 



121. If the seed be returned to the soil, is cotton an exhaus- 

 tive crop ? What escapes from fermenting seed ? Why should 

 it be preserved ? 



122. How should seed be applied ? 



123. Is the oil in cotton-seed valuable as a fertilizer ? Why 

 not? 



124. What are the good effects of grinding the seed ? How 

 can its constituents be preserved ? 



125. What important object should be accomplished on 

 every farm ? 



