CAMPBELL'S SOIL CULTURE MANUAL 81 



quite another. What the farmer wants to know is how 

 he can get the largest profit from his farm in a series of 

 years. If he be a stock grower it matters little how sci- 

 entific he may be in the handling and feeding of his stock 

 if his crop is short his profits are proportionately short. 



AVERAGE- GRAIN YIELD. 



If he depends upon the sale of fodders and grains for 

 profits, then his profits are very materially increased by 

 even a slight increase in yield. For illustration, the aver- 

 age yield per acre of wheat for the following states for 

 twelve years, 1893 to to 1904 inclusive, was: Illinois, 13.3 

 bushels; Minnesota, 14 bushels; North Dakota, 12.6 

 bushels; South Dakota, 10.2 bushels; Nebraska, 13.5 

 bushels; and Kansas, 12.3 bushels. 



Now suppose a farmer raises about the average or 13 

 bushels, from this must /come all the expense of raising, 

 threshing, interest on land, investment or rental, wear 

 and tear, or use of teams and tools, and when you figure 

 up as above and balance your account there is practically 

 nothing left for the farmer. 



Thirteen bushels of wheat per acre is about one-fourth 

 of the producing powers of any of the good lands in all 

 of the above states, or any other similar lands, and less 

 than one-third of the smallest yield we have gotten fol- 

 lowing summer tilling, where the work was properly done 

 in any one year during the past seven years. Supposing 

 that the farmer doubles the 13 bushels, the last 13 bushels 

 is nearly all profit, except the cost of threshing and mar- 

 keting. All that is necessary to get this increased yield 

 is to get the soil into a more scientific or correct physical 

 condition, and when this same amount of labor that was 

 required to fit the soil for the 13 bushel crop is applied. 



