64 GKOWING CEOPS 



7. When corn sells at 50$ a bushel, what is the loss to 

 a farmer on each bad ear of seed planted, if there are 800 

 grains of corn to the ear and each grain planted averages 

 1 good ear such that 100 make a bushel ? 



8. If 12 ears of properly selected seed corn will plant an 

 acre, how many ears will it take to plant a rectangular field 

 64 rd. by 30 rd. ? 



9. A farmer spends a half day in selecting seed corn for 

 a 5-acre field. If the increase in yield is 5 bu. per acre, how 

 much does he make at the present price of corn ? 



10. At gathering time 1200 bu. of corn should weigh 

 approximately how many bushels the first of the follow- 

 ing May ? 



NOTE. Corn shrinks about J of its entire weight during the first 

 6 mo. following gathering time. 



11. A man is offered 500 a bushel for corn at gather- 

 ing time. He holds the crop 6 mo. and sells it at 600 a 

 bushel. How much does he gain or lose by holding a crop 

 of 600 bu. ? 



12. A man is offered at gathering time 600 per bushel 

 for his corn crop. How much must he receive per bushel so 

 that he will neither lose nor gain by selling in the spring ? 



TESTING SEED CORN 



73. Corn selected for seed should be tested before plant- 

 ing. This can be done easily. Make a box 36 in. by 40 in. 

 and 2 in. or 3 in. deep. Pill the box about half full of moist 

 dirt, sand, or sawdust. Press it down so that it will have 

 a smooth, even surface. 



Take a white cloth about the size of the box, rule it off 

 into squares 2 in. or 3 in. each way, numbering them 1, 2, 3, 

 4, etc., and place it in the box upon the sand. 



