OATS, WHEAT AND COTTON. 133 



2. If the average yield for the period of 1902-1911 in the United 

 States was 14 bushels per acre, what per cent is that of the yield of the 

 average for Germany, Austria, Hungary, France and the United Kingdom 

 combined? 



3. If by proper methods of farming we could increase our production 

 of 14 bushels, 50 per cent, what would be the total production of the 

 United States when we are sowing 50 million acres annually? 



4. The highest average yield ever attained in the United States was 

 15.4 bushels per acre in 1909. The average production for the period 

 1891-1910 was 13.1 bushels. How many per cent greater was the yield of 

 1909 than the yield of the 1891-1910 period? 



5. In 1911 the average production of wheat per acre for certain 

 countries was given as follows : Scotland 43 bushels per acre ; England 

 38 bushels per acre; New Zealand 30 bushels per acre; Wales 30 bushels 

 per acre; France 25 bushels per acre; Germany 23 bushels per acre; 

 India and China 21 bushels per acre; the United States 13.5 bushels per 

 acre. 



How much is the average production of the United States below the 

 average production of the first ten states named in the list? 



PROBLEMS. 



1. The average yield of wheat per acre in the United States for the 

 10 year period 1900-1909 was 14.1 bushels per acre. The average yield 

 for the period from 1870 to 1900 was 12.5 bushels. What was the per cent 

 increase? 



2. The number of acres sown in 1870 was 19,000,000; the total yield 

 was approximately 236,000,000 bushels ; the total farm value was approxi- 

 mately $223,000,000 ; what was the approximate value per bushel ? 



3. The total number acres of wheat sown in 1911, was 49,543,000; 

 the total number of bushels produced was 621,333,000; the farm value was 

 $543,063,000. What was the average farm price per bushel? 



4. If 50 million acres of wheat are sown in the U. S. and the 

 average production is 14 bushels per acre, what would be the value of the 

 wheat raised if we could double the production at the present price of 

 wheat? (See market reports.) 



5. If the average consumption of wheat in the United States is 6.5 

 bushels per capita, how many bushels of wheat will be required to supply 

 the demands of a population of 95,000,000 people? 



6. When the United States has reached a population of 200,000,000, 

 what will be the number of bushels required to feed this nation at 6.5 

 bushels per capita? 



7. If the acreage should remain the same and our population were 

 to be doubled, what would be the required production per acre to supply 

 the United States at 6.5 bushels per capita? 



