FODDERS AND FEEDS. 



169 



are perhaps fairly representative of the amounts of fer- 

 tilizer constituents retained from the feeds in the various 

 animal products : — 



Manurial Constituents should be saved. — The 

 amount of fertilizer constituents voided in the manure 

 may, however, be greater than the amount actually pres- 

 ent when the manure is used, because of the losses that 

 may occur between the time it is produced and the time 

 it is applied to the land; hence the precautions given 

 in a previous chapter concerning the care and manage- 

 ment of manures should be carefully followed. 



