94 



A STUDY OF FARM ANIMALS 



ard, a steer weighing 1,000 pounds would require from 22.0 

 to 25.0 pounds of dry matter, 2.0 to 2.3 pounds of protein, 

 18.0 to 20.0 pounds of digestible nutrients, and with a nutri- 

 tive ratio of 1:7.0 to 1:7.8. Multiplying these requirements 

 for 1,000 by 1.2, in order to determine the amount needed 

 for the 1,200-pound steer, we find that he will require 26.4 

 to 30.0 pounds of dry matter, 2.4 to 2.76 pounds of protein, 

 and 21.6 to 24.0 pounds of digestible nutrients. Let us plan 

 to feed this steer a daily ration of 10 pounds of alfalfa hay, 

 30 pounds of corn silage, 10 pounds of corn and cob meal, 

 and 3 pounds of bran. To use a good system in the start- 

 ing of the work, we will arrange the different parts in proper 

 order for study, which is as follows: 



Ration for 1,200-pound Fattening Steer First Period 



The second step in calculating the ration will be to find 

 out how much dry matter, digestible protein, and total 

 digestible nutrients, occur in each of the amounts of these 

 different feeds, and write these figures in the proper blank 

 places in the table. Turning now to Table A in the Appen- 

 dix, you will find shown the amount of dry matter and' 

 digestible nutrients in 100 pounds of a number of differ- 

 ent feeding stuffs. The composition of each to be fed this 

 steer can be easily found. Let us take alfalfa hay for our 

 first calculation. 



100 Ibs. contain 

 Then 10 Ibs. contain 



ALFALFA HAY 



Dry matter 

 91.4 Ibs. 

 9.14 Ibs. 



Protein 

 10.6 Ibs. 

 1.06 Ibs. 



Total nutrients 

 51.6 Ibs. 

 5. 16 Ibs. 



