92 FARM ANIMALS 
but $6.35 worth of fertility, but receives 30 times as much as the 
value of the fertility contained in it. If he sells milk, he receives 
40 times as much as the fertility contained in it; and if he sells 
butter, his returns are 1,000 times as much as is the value of the 
fertility sold in the butter. 
14, Loss of fertility contained in feed.—Due to careless 
methods of handling manure, there is a tremendous loss 
of fertility in the aggregate each year. Much of the nitro- 
gen is lost as fast as the manure is made, through fer- 
TON OF HAY TON OF PORK 
Y $8.72 i . $6.55 
HlFertility Fertility Woo 2 ee cece ee 
. $16.00 $196.50 
|| Sale value Sale value 
SELLING Hocs VERSUS SELLING Hay 
Equal amounts of hay and pork are sold. Note the difference in market value and 
quantity of plant food sent from the farm in each. 
mentation and leaching. Much of the potash is lost in 
drainage waters from the stable and the barnyards. This 
loss can be greatly lessened by the use of litter in the 
stables, by covered barnyards, and through the addition 
from day to day of a preservative like acid phosphate to 
the excrement. 
There is loss through leaching, not only in barnyards, but wher- 
ever manure is exposed to the influence of the weather. In loose, 
open piles fully one-half of the fertilizing value may disappear in a 
half-year period. If manure is not hauled direct to the field and 
scattered, it may be fairly well preserved in large piles, which should 
be kept moist; or in covered barnyards, where it should be thor- 
oughly compacted, with enough litter provided to absorb the liquid 
and keep the animals clean. Fresh manures that undergo fermenta- 
tion rapidly, such as horse and sheep manures, should be mixed with 
litter immediately, else the nitrogen will be lost. Acid phosphate 
sprinkled on fresh manure has long been a popular preservative. 
15, Profit from feed.—The full value of a feeding stuff 
