242 



Elementary Principles of Agriculture 



for maintenance of bodily conditions, as well as those 

 used in secreting the milk. 



There are many other kinds of special rations, refer- 

 ring to the bodily needs of animals maintained under 

 special conditions, such as egg rations, wool rations, 

 etc. 



337. Planning a Ration. Suppose it is desired to 

 know how much and what kinds of feeds to give to a 

 dairy cow of 1,000 pounds live weight, giving two gal- 

 lons of milk per day. Turning to table of standard 

 feeding requirements (Appendix F.) we have: 



Live weight Total 

 pounds dry 



required matter 



Dairy cow, 16 Ibs. milk.. 1,000 27 



Digestible nutrients 

 Pro- Carbo- 



tein hydrate Fat 



2.0 11.0 0.4 



The problem is to find the combination of feeds 

 that will supply the above nutrients in approximately 

 the amounts indicated. Suppose we have alfalfa hay, 

 wheat bran and cottonseed meal. After studying the 

 tables of composition and digestible nutrients as given 

 in the Appendix, we may make a trial guess, with the 

 result as follows: 



The result shows that we do not have enough dry 

 matter, and too much proteid by .54 pounds. The 



