122 The Farmer's Business Handbook 



ducing milk or wool. Thus an ox at rest requires 

 less food than an ox at work and the various 

 nutrients in different proportions; a cow in milk 

 requires more food than one not in milk and to 

 have the nutrients differently balanced. 



Various investigators have condensed the re- 

 sults of many experiments and much practical 

 experience into what are called "feeding stand- 

 ards," which attempt to state what is in general, 

 and under average conditions, a good ration for 

 the purpose in view. While these standards can- 

 not be considered as mathematically exact, still 

 large practical experience has demonstrated their 

 great value as suggestions to feeders. 



In Table I, under the title of Feeding Standards, 

 are given the approximate requirements of various 

 classes of animals and under varying conditions. 

 These standards are mostly from German sources, 

 but they have been found to be very helpful to 

 American feeders. They are presented here as 

 arranged by Armsby, in Circular of Information 

 No. 1, "Computation of Rations for Farm Ani- 

 mals," Pennsylvania State College. The stand- 

 ards are for animals of 1,000 pounds live weight, 

 and may be increased or diminished for larger or 

 smaller animals, though it is probable that the 

 individuality of the animal, its power to assimilate 

 and produce, will have more to do with the vary- 

 ing of the ration than its weight. It is permissi- 



