MANURIAL VALUES OF FEEDING STUFFS 



89 



animal products than grain or hay. The depletion of fertility from 

 the farm is reduced to a minimum through the sale of these products. 



20 40 60 60 100 120 WO (60 



NITR06 N PHOSPHORIC ACIO POTASH MANORIAL VALUE PER TON 



COTTON-SLED MEAL 



UNSEED MEAL 



BUCKWHEAT MIDDLINGS 



DRIED DISTILLERS' GRAJNS 



MALT SPROUTS 



GLUTEN FEED 



DRJED BREWERS* GRAINS 



WHEAT BRAN 



CLOVER HAY 



WflEAT 



OATS 



INDIAN CORN 



BARLEY 



TIMOTHY HAY 



WHEAT STRAW 



MILK 



POTATOES 



CREAM 



MANGELS 



BUTTER 



FIG. 10. Manurial value of feeding stuffs (nitrogen valued at 15 cents per pound, phosphoric 

 acid and potash, 4 cents per pound). 



QUESTIONS 



1. Explain what is meant by the manurial values of feeding stuffs. 



2. Name some feeds that are especially high in fertilizer ingredients; also 



some that are low. 



3. What percentage of nitrogen and of ash constituents are voided in the 



total excrement by (a) milch cows; (&) fattening steers? 



4. Why is it a poor practice to sell hay cr straw from a farm? 



5. What is the value of the fertility obtained in a ton of milk; a ton of 



pork; a ton of alfalfa hay? 



