WHY PLANTS GROW 17 



15. It will cost about $0.25 per acre to stack the 

 grain. Find the cost of stacking. 



1 6. What is the threshing bill at 2 cents per 

 bushel? Find the entire cost of the crop. 



17. If the yield has been 20 bushels per acre, 

 worth 90 cents per bushel, how much has the farmer 

 made over and above the entire cost of labor? 



1 8. How much has he made if the crop has yielded 

 25 bushels per acre, worth $0.80 per bushel ? 



19. Have any items of the cost of producing this 

 wheat been omitted? If so, what? Should we allow 

 for them? Let us do so and find the result. 



20. With a crop of 50 bushels of shelled corn per 

 acre, worth $0.40 per bushel, work the same series of 

 problems, omitting such as do not apply to corn 

 raising. 



To the Teacher : The above list of problems is intended to 

 suggest others. Ask the pupils to find the current prices of corn, 

 oats, barley, hay, etc. What is considered a good crop per acre 

 of each of these? Then estimate the cost of labor. Have 

 them furnish all the necessary data. This they can get from 

 home. Make up a list of problems similar to the above from 

 data furnished by the pupils. Let one pupil furnish data for one 

 set of problems, another pupil furnish data for another set, and 

 so on. Pass the honors around. You should have both parents 

 and pupils interested before you have progressed far with this 

 work. Observe this policy throughout the course of instruction 

 in this branch. It will be observed that there is a logical order 

 in arrangement of the problems ; in many cases the conditions 

 necessary for the solution of a problem are found in one preced- 

 ing it. 



