LESSON FIVE 
FOOD NUTRIENTS 
1. Nutrients defined—Any substance absorbed into 
the system in the process of digestion or that contributes 
to the support of animal life is a nutrient. Hence, the 
albumen of an egg, the starch of a potato, the salts of an 
apple, the ash of wheat bran, the fiber of pasture grass, 
are all nutrients and as such promote the well-being of 
animals in growth, work, milk, or flesh increase. 
2. Most feeding stuffs are unbalanced——Only a few 
feeding stuffs furnish alone the required quantities of pro- 
tein, carbohydrates and fat. The most economical and 
best results are secured when two or more are combined. 
By such combinations, if one feed is lacking in protein, 
the deficiency may be met in the ration through the selec- 
tion of another substance possessing the protein element 
BALANCING THE RATION IMPROVES IT 
The two larger pigs at the right have been fed corn and tankage, while the two 
es - the left have been fed corn only. This shows why a balanced ration 
is worth while 
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