276 LESSONS IN AGRICULTURE 



inches deep than to plow it only four inches deep ? La- 

 bor worth $2.40 per day. 



6. If a man and team can till three acres thoroughly 

 in a day, or five acres in a careless manner, how much 

 more per acre does a good job cost, labor being worth 

 $2.40 per day? 



7. How much more per acre does it cost to both 

 plow and till well? How many additional bushels of 

 oats worth 36 cents per bushel will it take to pay for 

 the additional labor? 



8. How much will be the gain if but forty bushels 

 of oats can be raised with shallow plowing and careless 

 seeding, and fifty-seven bushels with the extra work? 

 How much will these oats be worth at 24 cents per 

 bushel? At 30 cents per bushel? At the present price 

 of oats ? 



9. A certain piece of land yields thirty-five bushels 

 of corn per acre. By careful cultivation the farmer is 

 able to increase this yield to sixty bushels. With corn 

 worth 40 cents per bushel how many additional days' 

 labor at $1 per day will the extra yield pay for? 



10. If he spends but twenty days' extra time on his 

 twelve-acre field of corn to produce the increase in crop 

 shown in problem 9, how much does he get per day for 

 his extra time ? 



11. Suppose a farmer is able to double the average 

 yield of 160 bushels of potatoes from an acre of land 

 by putting fifteen days' extra time on it. What wages 

 does he get with potatoes at 25 cents per bushel ? 



12. From answers to the following questions make 



