Feeding Standards — Calculating Rations. 



121 



The following table by Armsby sets forth the maintenanct re- 

 quirements of horses, cattle, and sheep, no table having yet been 

 formulated for swine : 



Armshy's maintenance standard for Jiorses, cattle, and sheep. 



The table shows that a young, growing horse weighing 500 lbs., 

 when neither gaining nor losing in weight, requires for its daily 

 support 0.60 lb. of digestible protein and 4.40 therms of net diges- 

 tible matter, the latter including the 0.60 lb. of digestible pro- 

 tein. When this growing horse reaches 1000 lbs., there is re- 

 quired for its maintenance 1 lb. of digestible protein and 7 therms 

 of net digestible matter. Tho it has doubled in weight, the food 

 requirement has not likewise doubled. When the horse reaches 

 the weight of 1500 lbs., there is required a further increase of 

 only 0.3 lb. of protein and 2.20 therms of net energy. 



144. Standards for growing animals.— In the table which fol- 

 lows, Armsby sets forth the digestible protein and net energy re- 

 quirements of growing cattle and sheep, no data as yet having 

 been given for horses and swine. The figures include the main- 

 tenance requirements. 



