Protein is a collective term for a considerable group of compounds, 

 all of which contain nitrogen. Ingredients high in protein are usually 

 more expensive than the other ingredients, making protein the most 

 important nutrient for consideration in determining the commercial 

 value of a feedingstuff. The nutritional value of the proteins varies 

 widely ; therefore, a feedingstuff should contain protein from several 

 sources to insure inclusion of all essential types. 



Fat is separated from the other components of a feedingstuff by 

 extracting the moisture-free sample with anhydrous ether. In such 

 ingredients as the cereals, the seed-m.eals, and animal products, the 

 extract is nearly pure fat. A few ingredients such as alfalfa meal 

 contain some ether-soluble material which is not fat. When urea is 

 present the figure for the percentage of fat found may be high as 

 much as two-tenths per cent, due to the slight solubility of urea in 

 anhydrous ether. When sulphur is present, the percentage of fat 

 found is much too high, since sulphur is readily soluble in anhydrous 

 ether. 



Fiber is composed of cellulose and related compounds. Since 

 crude fiber has little feeding value, the law requires that the maxi- 

 mum fiber be guaranteed rather than the minimum as in protein and 

 fat. 



It is not within the scope of this bulletin to make recommenda- 

 tions regarding the use of commercial feedingstuff s. The Department 

 of Dairy Husbandry and the Department of Poultry Husbandry are 

 continuously studying feeding problems. The following publications 

 of these departments are free to residents of New Hampshire. Ad- 

 dress your request to Mail Service, University of New Hampshire, 

 Durham, New Hampshire, 



Ext. Cir. 195 Adjusting Feed Costs to Reduced Milk 



Incomes, 4 pp. 



Folder 10 The Use of Home-grown Grains in 



Feeding the Dairy Herd. 



Press Bull. 100 Home-grown Dairy Feeds, 1 p. 



Ext. Bull. 67 Turkey Production in New Hampshire, 



16 pp. 



Ext. Cir. 158 Feeding Chickens, 18 pp. 



Ext. Cir. 250 The Home Poultry Flock, 12 pp. 



Sta. Bull. 335 Protein Requirements of Chickens at 



Various Stages of Growth and Devel- 

 opment II, 15 pp. 



Sta. Cir. 52 Growth and Feed Standards for New 



Hampshire, 8 pp. 



Sta. Cir. 56 Fine Versus Coarse Grit as a Feed In- 



gredient for Poultry, 8 pp. 



Ext. Cir. 282 Dairy Calves. 



While the word feedingstuff does not appear in all the above 

 titles, no publication is included which does not discuss some aspect 

 of the use of feedingstuffs. 



