Dakota farmers' leader. (Canton, S.D.) 1890-19??, 1903-04-03

ton, give them good narrowing and
don't be afraid that You will do too
much of it, After they are up 80 you
can see the rows use the cultivator
again and then follow with the harrow
or weeder Use this mode of cultiva-
tion until the tops are six or eight inch
es high and do not be alarmed that you
will spoil your potatoes. For this Sec
ton of the country would advise level
cultivation. .t-
WHAT DO WE CULTIVATE FOR.
To keep down the weeds and the sur.
face mellow and fine so az to let in air
and check evaporation from below,
these are the main reasons Have you
ever stopped to think how much dam
age weeds do, there is no question on
this point, they eat up plant food and
deprive your potatoes of it just as GER
tainly as rat eating some of the oats
fed your horse, cheats the horse ont of
some of his food, if you let them grow,
they will eat and you pay the full bill
in potatoes.
ROTATION OF CROP.
A rotation of crop is needed we can
not to advantage, year after year, grow
potatoes on the same ground. The
ground becomes tired OF raising one
crop only; the ingredients used by it
become exhausted, or some of them do,
and then enemies to the crop increases;
when it is grown continuous without
change A short rotation where each
crop occupies the ground a single year,
help greatly about warding of damage
by all the various pests. They hardly
have chance to gain foothold be-
fore their feeding ground is torn mp
and crop put in that they do not like
Such trouble as the scab and blight are
doubtless made worse by growing crop
after crop on the same soil
ABORTION IN COWS j. W. BRENNER
The disease of abortion in COWS may
be spread and appear in other unaffected
cows. Either by infection or contagion,
or both, depending on whether the un-
affected cows have access to the newly
aborted COW, to spread the contagion
by infection, or whether they have &C.
cess to the voidments or discharges, of
the newly aborted COW, to spread the
disease bv contagion.
It is believed that abortion in COWS is
prod uced by ovaritus, caused by the
presence of numerous germs operating
upon the ovaries
Perhaps we might gain better con-
(ception Of the subject under discussion,
if were to state here. that disease
producing germs differ widely in their
point Of attack. To illustrate, the
typhoid germs when taken in the sys-
tenn, either by infection or contagion,
invariably attack the mucous lining of
the large intestine. producing thereon,
somewhat of cancerous liberation.
The tuberculosis germ attacks the
membrane as we'll as the lung tissue.
The germ that produces abortion in
COWS, attacks, weakens and breaks
down the structural ovaries. Each
species of germs, when take in the sys-
tenn has it's individual point of attack,
and adheres strictly to their own place
for operation. .-....
The question may be then asked how
long will these germs remain in the
system without materially affecting the
health of the animal In answer to
this, would say that the rapidity with
which germs multiply, depends entirely
upon the condition of health of the It's
sue structure which they occupy. If
|. the tissue shoald remain in q healthy
condition their propagation would be
so slow that no bad results might
follow. But should their be an abnor-
NAL condition in the part affected, pro-
duced from any cause, then their multi
plication would be 80 rapid, as to dan
gerously weaken, and rapidly de-
stroy the vitality Of the part thus af-
fected. That these germs when
brought in contact with any portion of
interval organism are absorbed by the
blood, and, through the blood, are car.
ried to. and find lodgment in that por-
tion of the system peculiar to their
specie, and it makes no difference by
what agency they reach the internal
organism go far as the result of their
operations are concerned. So I would
conclude, that these germs might re.
main in the system, multiplying slowly,
if at all, go long as their point of attack
remained in normal condition.
With this then as an Introductory l
wish to speak of some of the agencies
that produce those conditions Thus
far we have only spoken of the
germs after having been intro.
duced in the system and of their field
for operation the ovaries. Now, we
wish to notice the different manner in
which they reach the system and the
conditions necessary for this accomp'
lishment.
The manner as before stated in which
the contagion may be spread to other
cows, is first, by infection. That is, by
the unaffected animals breathing the
germ polluted atmosphere surrounding
the newly aborted COW, her discharges,
or. the aborted foetus. This may occur
nndar favorable conditions in the omen