would be a wide ration. A well-balanced ration contains one part 

 protein to five or six and one-half parts of carbohydrates, as the require- 

 ments demand. 



If the animal is young and a rapid growth is desired, then the ration 

 should be about one to five, and when fat is desired, more carbohydrates 

 should be given and the ratio increased to one to six or possibly one 

 to six and one-half, for the reason that carbohydrates form the fat, 

 and are the source of energy. 



The Nutrients in Feeds 



The following statement is taken from the sixteenth edition of "Feeds 

 and Feeding," by Henry and Morrison: 



"The term nutrient is applied to any food constituent, or group of food consti- 

 tuents, of the same general chemical composition, that may aid in the support of 

 animal life. Crude protein, the carbohydrates, and fat constitute the generally 

 recognized primary classes of nutrients, although air, water and mineral matter 

 might likewise be so termed. 



"The term digestible nutrient covers that portion of each nutrient which is 

 digested and taken into the body, as determined by digestion trials with various 

 mature animals. 



"On the farm a ration is the feed allowed or set apart to maintain a given anima] 

 during a day of twenty-four hours, whether all thereof is administered or fed at one 

 time or in portions at different times." 



Upon comparison, it will be observed that authorities differ slightly 

 in the percent of nutrients in various feeds; also that the same authority 

 may seem to differ in his statements at different times. This is due to 

 the fact that the amount of nutrients in feeds as determined by analysis 

 shows a slight difference because of a variation in grades and the stage 

 of growth of the feed at the time the analysis is made. It should also be 

 remembered that there is a difference between the amount of nutrients 

 and the amount of digestible nutrients in a given feed. 



DIGESTIBLE NUTRIENTS 

 AND FERTILIZING CONSTITUENTS 



The following figures are taken from the extensive tables in "Feeds 

 and Feeding," sixteenth edition, by Henry and Morrison. They are 

 specially copyrighted by the authors and may be reprinted only on per- 

 mission from them. Other tables giving the nutrients and digestible 

 nutrients in feeds, that appear in this book, were taken from "Feeds 

 and Feeding," fifteenth edition, by Henry, and are also protected by 

 copyright: 



399 



