Manurial Value of Feeding Stuffs. 265 



kept of all water and food supplied, and of the voidings, irith the 

 following results: 



Manure obtained from steer confined in box-stdU thirty-six montJia — 



Ontario Agricultural College. 



Pounds. Pounds. 



Weight of steer at end of thirty-six months 1,588 



Water drank 42,449 



' Feed consumed: Pounds. 



Milk 3,862 



Boots 7,270 



Grain 5,857 



Coarse forage. 20,957 



Total 37,946 



Total weight of feed and water 80,395 



Total weight of excrement 46,560 



Total manure, including bedding 59,280 



Excrement per pound gain, hve weight 30 



Manure, including bedding, per pound gain, live weight 37 



417. Heiden's method for calculating manure produced. — ^Heiden^ 

 computed the amount of manure produced by farm animals in the 

 following manner. He found that 47.3 per cent, of the dry mat- 

 ter supplied in the food of the horse re- appears in the solid and 

 liquid voidings, which contain 77.5 per cent, water and 22.5 per 

 cent, dry matter. From these data the following proportion ia 



derived: 



22.5 : 100 :: 47.3 : (210) 



By this we understand that for each 100 pounds of dry matter 

 fed the horse there are 210 pounds of voidings. This method of 

 calculation gives the following results for each 100 pounds of dry 



matter fed: 



The horse voids 210 pounds of fresh manure. 

 The cow voids 380 pounds of fresh manure. 

 The sheep voids 180 pounds of fresh manure. 



418. Nitrogen and ash retained and voided by farm animals. — In 



supplying feeding stuffs to farm animals some of the nitrogen and 

 ash they contain are taken up for nourishment and retained in 

 the body, or, after use, expelled in the urine. A considerable 

 portion of the substances under discussion is not dissolved from 



' Storer's Agriculture, VoL 1, p. 615. 



