THK MANAUKMtINT OK STOCK 267 



purcliusiiig most of tin' jiijraiii or other I'oiict.'ii- 

 tratod food whi«li is roqiiind. Tht'so foods are 

 mostly by-products (437^0, sucli as bran, oil- 

 meal, cottou-sood meal, and tlio *]:luton nioals. 

 It is said tiiat it is choaiKT to j)urt'iiaso (^on- 

 eontrated foods than to ]>i-o(hi('t> tlifiii on the 

 farm, and miu'li stress is hiiil on tlio resultant 

 plant -food or manure which is secured from 

 feedinc: these ])roducts. 



4!><). A ton of wjieat bran contains tln' fol- 

 lowinur amounts of ])otential plant-food in every 

 tliousand pounds : 



2G.7 M's. nitropen 



28.9 " phosphoric acid 



16.1 " potash 



This would seem to indicate that a thousand 

 pounds of bran would be worth, for manurial 

 purposes, $r).r)7, or $11.14 per ton — comi)Uiin^ 

 the nitrogen at V2 cents, phosphoric acid at 6 

 cents and the potash at 4 cents per pound. 



41)7. If the bran is fed to milch cows, it is 

 estimated that not less than ."iO per cent of the 

 platit-food constituents of the food will lie found 

 in the manure. If this be so, then the manure 

 which is the result of feeding one thousand 

 pounds of bran would bo worth $'J.79, or from 

 feedinir a ton of bran, sfr).;').'^. If the bran be 

 fed to aninuils that neither piin nor lose, and 

 are not producing milk or other products, then 



