190 BOARD OF AGRICULTURE. 



2. Of the non-nitrogenous constituents of food, starch and cane 

 sugar have, weight for weight, nearly equal feeding values ; malt 

 sugar has probably rather a lower value than either cane sugar or 

 starch ; digestible cellulose, in moderate proportion, has, for rumi- 

 nant animals, probably nearly the same value as starch ; and fat or 

 oil have probably about two and a half times the value of starch for 

 the purposes of respiration, or the storing up of fat in the body. 



3. Some advantage results, in a feeding point of view, from the 

 judicious mixture of a variety of ordinary stock foods ; but the 

 benefit to be derived in this way is not such as to compensate 

 for the extra cost of a special manufacturing process to attain it. 



Connection between the Value of the Manure and the Composition 



of the Food consumed. 



The next and last branch of the subject relates to the compara- 

 tive value of the different constituents in the liquid and solid 

 voidings of the animals, and to the connection between the value 

 of the manure and the composition of the food from which it is 

 produced. 



I have already pointed out that the greater portion of the car- 

 bon, hydrogen and oxygen of the food either passes into the 

 increase or off in respiration, and that comparatively little of any 

 of them is recovered in manure. By far the larger portion of the 

 nitrogen, and nearly the whole of the mineral matter consumed 

 are, however, so recovered. 



To show the economic connection between the feeding of stock 

 for the production of meat and manure, and the growth of corn, I 

 propose to adduce a few results obtained in experiments on the 

 growth of wheat by different manures. In the experiments in 

 question, wheat has been grown for twenty successive seasons on 

 the same land. 



In Table V. are given the average annual produce of corn and 

 straw, and the estimated yield of carbon, per acre, over the last 

 twelve years, respectively without manure, with mineral manure 

 alone, with mineral and nitrogenous manure (ammonia salts), and 

 with fiirm-yard manure. 



Where the farm-yard manure was employed, more carbon, as 

 well as more of every other constituent, was annually applied in 

 manure than removed in the crop. In the other cases no carbon 

 whatever was supplied in the manure ; and yet it will be observed 

 that where the mineral manure and ammonia salts were employed 



