HOW TO BUY FEEDS 69 



It is therefore difficult except on the basis of an open formula 

 to tell a farmer how to select and use a proprietary feed. 



115. Feeds with public formulas. — What we mean by a feed 

 with a public formula is a feed sold with a tag attached to each bag 

 with the formula by which the feed is mixed printed on the tag. 

 From this the buyer can tell not only from what ingredients the 

 feed is made but he knows exactly how much of each ingredient is 

 used. This will enable one to compute the value of the ready- 

 mixed feed and compare it with what he can do in home mixing 

 when he buys the separate ingredients. We believe that all 

 farmers should insist on having public formulas printed on the 

 tags of all the mixed feeds they buy. In Chapter VIII we will show 

 how this can be and has been worked out successfully. An example 

 of a feed with public formula is G.L.F. Milkmaker. The formula 

 given on page 68 is printed on the tag accompanying every bag of 

 G.L.F. Milkmaker. 



