AMOUNT PRODUCED PER HORSE. 21 



and mineral matter in 4 Ib. of straw are .01 and 

 .23 Ib. respectively. The total amount of nitrogen 

 and ash, therefore, in the farmyard manure produced 

 by a horse in one day would be .19 Ib. nitrogen and 

 1.15 Ib. mineral matter; or, if we take the larger 

 quantity of straw, somewhat more. 



Taking these figures, we find that the amount of 

 manure produced by a horse in a year will be from 

 11,720 to 12,450 Ib. (i.e., from 5J to 5| tons), 1 con- 

 taining from 69 to 73 Ib. nitrogen, and from 420 to 

 460 Ib. mineral matter. 2 



A word or two may be of value regarding the treat- 

 ment in the stable of horse-manure. The great object 

 to be aimed at is the prevention of loss of valuable 

 fertilising constituents. This loss may be due to 

 two causes. It may be, in the first place, caused by 

 drainage of the soluble matter of the manure ; or 

 secondly, it may be due to volatilisation of the vola- 

 tile constituents. 



The first of these two sources of loss depends on the 

 precautions taken in the way of providing a proper 

 impervious flooring to the stable. This source of loss 

 is extremely difficult to prevent, inasmuch as nearly 

 all materials used for flooring absorb a certain per- 

 centage of urine. The judicious use of litter, however, 

 will minimise this loss to within a trifling extent. 



1 This is taking no account of the amount of water which the 

 manure will absorb, and which will probably double the quantity. 



2 See Appendix, Note IX., p. 57. 



