THE MANAGEMENT OP STOCK 267 



purchasing most of the grain or other concen- 

 trated food which is required. These foods are 

 mostly by-products (437a), such as bran, oil- 

 meal, cotton -seed meal, and the gluten meals. 

 It is said that it is cheaper to purchase con- 

 centrated foods than to produce them on the 

 farm, and much stress is laid on the resultant 

 plant-food or manure which is secured from 

 feeding these products. 



496. A ton of wheat bran contains the fol- 

 lowing amounts of potential plant -food in every 

 thousand pounds : 



26.7 1V>. nitrogen 



28.9 " phosphoric acid 



16.1 " potash 



This would seem to indicate that a thousand 

 pounds of bran would be worth, for manurial 

 purposes, $5.57, or $11.14 per ton computing 

 the nitrogen at 12 cents, phosphoric acid at 6 

 cents and the potash at 4 cents per pound. 



497. If the bran is fed to milch cows, it is 

 estimated that riot less than 50 per cent of the 

 plant-food constituents of the food will be found 

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

 which is the result of feeding one thousand 

 pounds of bran would be worth $2.79, or from 

 feeding a ton of bran, $5.58. If the bran be 

 fed to animals that neither gain nor lose, and 

 are not producing milk or other products, then 



