The Yale expositor. (Yale, St. Clair County, Mich.) 1894-current, 1918-04-11
Figures Compiled by College
Settle Question of Its Pres
ent Feeding Value.
IDEAL AS GRAIN SUPPLEMENT
Gives Best Results When Fed With
Cereal Grains to Supply
heterogeneous Elements
In Ration.
BY n. w. NORTON,
Investigator of Livestock Experiment
Station, M. A. C.

ANNSI LunSiLS, mlCi.-lHe uHDTeCe-
denied prices of feeding stuffs within
the past year have done more than
bleed our pOcketbooks-they have up
set our sense OF values. We knew n
year or two ago that we could afford
to pay 10, 20 or % cents hundred
weight for skim milk, but what is it
safe to pay now?
The feed market Is wearing such a
completely new front that most of us
can scarcely more than guess. When
1t is realized, however, that Michi-
gan's estimated annual production of
skim milk is 1869 $4,000 pounds, we
can readily appreciate why this matter
is one of such immediate interest and
Importance
The results Of n study of this sub
ject completed recently by the expert
ment station of the college are ac-
cordingly of much value, for they an
swer, at least in part, the ever-recur-
ring question, How much can l af-
ford to pay?"
TO arrive at an answer II was first
necessary, Of course. to determine
what milk is worth as a feed. For
this purpose the results of feeding eX-
periments conducted by many stations
were summarized. These showed that
40 pigs fed cereal grains only (cOrn.
wheat. rye and barley included) made
an average gain of 100 pounds for
each 1868 pounds of grain eaten.
Further. ii was found that in the
case of 325 pigs which were fed ra-
ton Of cereal grains (corn. wheat and
rye included, with skim milk as a sup
plement, each pig made an average
gain of 100 pounds from 1868 pounds
Of grain and 1851 pounds of skim
milk. resulting in a saving OF 2196
pounds of grain-or, I'm other words,
100 pounds of skim milk replaced %
pounds of grain.
Having the grain value of skim
milk when fed as a supplement to corn
and other cereals, the determination
of its money value is relatively simple.
Thus. when the price of grain per
100 pounds is $1.00, 100 pounds of
skim milk as a supplement to cereal
grains (for pigs) is found to be worth
% cents; when the price of grain is
$1.25, skim milk is worth 80 cents ;
when grain Is worth $3.50 a hundred
pounds, skim milk is worth AZ cents (;
when grain is worth $1.75. skim milk
is worth 40 cents; when grain is worth
$500, skim milk is worth Sc cents I;
when grain is 1928, skim milk is worth
63 cents; when grain is worth $3.50,
skim milk is worth 20 cents; when
grain is worth 1913 q hundredweight,
skim milk is worth II cents; when
grain is worth $500, skim milk is
worth "a cents; when grain is worth
1925, skim milk is worth 81 cents
when grain is worth $3.50 skim milk
is worth 9S cents; when grain Is
worth S3.75, skim milk is worth $1.05
when grain is worth $500, skim milk
is worth SLIP, and when grain is
worth S4.25, skim milk is worth $1.19
hundredweight.
This table shows that when prices
of cereal grains range from $1,000 TO
$4,000 per ton, as has been true dur
ing the winter of 1917-101S, skim milk
will range from 40 cents to $1.20 per
hundredweight in value as a supple
mentary feed.
The value of this by-product of the
dairy as a supplement to corn and
other cereal grains indicates that when
It is available IL can be combined to
cd M hn %
grown grains for pig feeding. If it is
not available, as, for instance on the
farm where the whole milk is sold to
the retail trade or for condensing pur-
poses, II becomes necessary, If best
results are to be secured, to purchase
1t or some other protein feed to com
bine with the cereal grains. Tankage
middlings and oil meal are the feeds
most commonly used in place of skim
milk for feeding pigs, and I'm order
that comparison of these different
supplements could be made, the re-
suits of a large number of feeding
trials from a number of different ex.
pertinent stations have been sum.
married.
Where 325 pigs consumed an aver.
age of 2669 pounds of cereal grains
per 100 pounds gain, with 1851 pounds
of skim milk as a supplement, 100
pounds of the supplement replaced 2s
pounds of grain; where 332 pigs con
sumed an average of 379.3 pounds OF
cereal grains per hundred pounds
gain. with 42.5 pounds of tankage as
a supplement, 100 pounds of the tank
age replaced 252.5 pounds of grain
where $50 pigs consumed an average
of 1888 pounds OF cereal grains fol
100 pounds gain, with 1912 pounds OF
middIings as supplement, 100 pounds
OF the mlddlings replaced 1852 pound:
of grain; where Jog pigs consumed ar
average OF 377.3 pounds of cerea
grains for every 100 pounds gain with
SIT pounds OF oil meal as a supple
ment, 100 pounds OF the oil meal re
placed 261.7 pounds OF grain. and