44 LESSONS IN AQRICULTUEE 



4. Suppose two fields of potatoes of an acre each, 

 owned by different farmers. One farmer sprays to 

 cure the blight, and gets 188 bushels of potatoes, worth 

 50 cents per bushel. The other neglects his field and 

 gets but 75 bushels. What is the difference in the 

 value of the two crops? 



5. What did it cost the first farmer to apply the 

 spray ? What is his actual gain over the other farmer ? 

 Did it pay to spray? 



6. If formaldehyde costs 50 cents per pint, and a 

 pint will treat 40 bushels of oats, how much will it 

 cost per acre to treat the seed oats, sowing three bush- 

 els to the acre ? 



7. Suppose it takes a day's work, worth $1, to treat 

 the seed for 12 acres, what is the total cost of the treat- 

 ment? 



8. How many bushels of oats, at 30 cents per 

 bushel, will it take to pay for the treatment? Suppose 

 the treatment increased the yield 20 bushels per acre, 

 how much does the farmer gain on his crop ? 



LESSON XIII 



THE WHEAT CHOP 



General cultural requirements. Wheat has been 

 cultivated from the earliest times. The crop ranks third 

 in value in the United States. It grows in cool, tem- 

 perate, and warm climates, and in many kinds of soil. 

 It does best in clay loam, and poorest in sandy loam. 



