62 ELEMENTARY AGRICULTURE 



yield of 160 bu. of potatoes from an acre of land by 

 putting 15 days' extra time on it. What wages does 

 he get with potatoes at $0.25 per bu. ? 



12. From answers to the following questions make 

 other problems similar to the above. What does labor 

 cost per day? How many acres can a marl plow per 

 day? How many acres can he seed in a day? How 

 many acres of corn can he cultivate ? Will extra labor 

 increase the yield of corn ? etc., etc. 



