I2O FEEDING FARM ANIMALS 



to grow all the protein on the farm. Hence this 

 nutrient must be secured elsewhere. This is done 

 either through purchase of grain materials not raised 

 on the farm, or the purchase of by-products from 

 manufacturing concerns. Bran comes from flour 

 mills, gluten products and meal from the manufac- 

 turing of starch, and cottonseed meal from the oil 

 mills, and various other mill products from other 

 forms of manufacture. There is a long list of con- 

 centrates as the source of protein consumption. The 

 feeder is interested in knowing which of them he 

 shall purchase. Three things will aid him in the 

 selection: The protein content, the total digestible 

 nutrients, and the market price of the feeding stuff. 

 A wise selection requires the three to be consid- 

 ered together. For instance, the following food- 

 stuffs at market prices are available to a feeder : 



Corn 65 cents a bushel 



Oats 56 cents a bushel 



Gluten meal $30 a ton 



Cottonseed meal $32 a ton 



Bran $30 a ton 



Using the above as examples, which shall be 

 selected if the feeder simply desires to get protein 

 for the purpose of balancing a ration, having as its 

 basic constituents feeding stuffs raised on the farm? 

 In other words, if the feeder is abundantly supplied 

 with roughage materials like corn stover, silage, 

 grass, and legume hays, what concentrate shall he 

 select in order to get protein to balance his ration? 



The sensible thing to do is to determine which 

 food furnishes a pound of protein at least cost. We 

 find in 100 pounds of each of these feeds the follow- 

 ing quantities of protein are to be obtained : 



