296 



PRODUCTIVE FEEDING OF FARM ANIMALS 



eaten are secured from young pigs'; or, to put it in another way, 

 the amount of feed required for a pound of gain is smallest in the 

 ease of young pigs, and increases steadily with advancing age (Fig. 

 72). The fact is brought out in a striking manner by the follow- 

 ing compilation by Henry 2 of over five hundred feeding trials 

 conducted at American experiment stations with over 2200 pigs 



The Relation of Weight of Pigs to Feed Consumed and Bate of Gain 



in all. In compiling the results given in the table, six pounds of 

 skim milk and twelve pounds whey were rated equal to one pound 

 of concentrates (one feed unit) . The table shows the average weight 

 of the pigs in each group, the feed eaten daily and per 100 pounds 

 live weight, the daily gains made, and the feed per 100 pounds 

 gain (Fig. 73). 



Fia. 72. — The amount of feed consumed per 100 pounds of gain for fattening pigs increases 

 with their live weights. 



2 " Feeds and Feeding," 10th ed., p. 502. 



