GRAIN CROPS 45 



3. By what method can one cheaply separate the large, plump 

 kernels of grain from the small and light kernels? 

 Arithmetic: 



1. Two men can clean and grade with a fanning mill 20 bus. of 

 grain in an hour. If the best 30% is saved for seed, how many bushels 

 of seed will be secured? How much will it cost per bushel to save 

 seed in this manner, if each man's time is worth 15c. per hour? 



2. If it costs 5c. per bushel to grade out the best seed and it 

 requires two bushels of seed to seed an acre, how much must the yield 

 be increased per acre to pay for the extra cost of grading the seed, if 

 oats are worth 38c. per bushel? 



3. If one seeds 50 acres to grain that germinates but 80%, what 

 proportion of the land is seeded to grain that will not grow? 



WHEAT 

 PRODUCTION 



Importance. — Wheat is the chief source of bread com- 

 monly eaten in the United States; in fact, in the greater part 

 of the world. White bread is found on nearly every table 

 at every meal. It is even more common than potatoes. 

 The United States produces about 730,205,000 bushels 

 of wheat annually. It is one of the large wheat-producing 

 countries of the world. Russia produces about the same 

 amount. Each person in America uses about 4.7 bushels 

 of wheat per year. The central western states, from Ohio 

 and Indiana west to Kansas and the Dakotas, are the 

 principal wheat-producing states. 



The wheat yield of the United States for 1914 was 878,- 

 680,000 bushels valued at $610,122,000. This was the 

 largest crop ever raised in this country. The average per 

 acre was raised from 16.7 to 19 bushels. 



Place. — Wheat has been grown in the central western 

 states quite generally for the first years of their development. 

 In the older states it is usually replaced to a considerable 

 extent with corn and grass, and, whib there is still a large 

 acreage of wheat grown in these states, it is by no means 

 the chief crop. It has a very important place on a general 

 farm, and, when grown in rotation with other crops, it is 

 a profitable crop. Wheat ordinarily does not yield as 

 large a money return per acre as corn or potatoes, but it 

 may yield as much profit, because a comparatively small 

 amount of labor and expense are required to grow it. Wheat 



