8 PRINCIPLES OF FEEDING FARM ANIMALS 



Sodium and chlorine must be furnished to nearly all 

 animals in the form of sodium chloride or common salt, 

 as the ordinary feedingstuffs do not supply these elements 

 in sufficient amounts. 



The amount of mineral matter or ash in a feedingstuff 

 is determined by igniting a weighed sample of the feed 

 until all organic matter has disappeared. The residue is 

 ash or mineral matter. The weight of the ash divided 

 by the original weight of the sample, and multipUed by 

 100, gives the percentage of mineral matter. 



Table 2. — Percentages of Mineral Matter in the Different 



Classes of Feedingstuffs ^ 



Milk and milk prod- Oil-bearing seeds . 2.6 to 4.3 



nets .... 0.4 to 0.8 Straws . . . . 3.2 to 5.8 



Roots 0.8 to 1.2 Stovers and fodders 3.7 to 12.0 



Silage 1. 1 to 2.8 Cereal by-products 1.0 to 6.2 



Grass pastures . . 1.0 to 2.8 Oil by-products . 4.0 to 6.7 



Cereal grains . . . 1.4 to 3.0 Grass hays . . . 3.9 to 7.9 



Leguminous pas- Leguminous hays . 6.7 to 10.7 



tures . . . . 1.3 to 3.5 Packinghouse by- 

 Leguminous seeds . 2.6 to 5.4 products . . . 4.1 to 64.4 



Table 2 shows the average percentages of mineral matter 

 in the different classes of feedingstuffs. This table shows 

 that the packinghouse by-products are quite high in ash 

 content, — 4.1 to 64.4 per cent. Especially is this true of 

 bone meal and tankage, meat scrap and blood meal being 

 only fairly high. Leguminous hays contain fairly large 

 amounts, — 7 to 11 per cent, as also do the non-legume 

 hays, the oil and cereal by-products, the straws, the oil- 

 bearing seeds, and the legume seeds, — 2 to 8 per cent. 



^ These values represent the upper and lower limits of the average con- 

 tent of naineral matter of the common feedingstuffs included under each 

 class. 



