The danger from bloat in pasturing sheep upon alfalfa is at least as
great as in pasturing cattle on the same, and the methods of managing
them while thus being grazed are not far different. So, too, the
experiences in such grazing are very similar. The losses from such
grazing some seasons have been slight. Other seasons they have proved so
heavy as to make such grazing unprofitable. When sheep are being grazed
on alfalfa, a light feed of grain given in the early morning reduces
materially the danger from bloat. It also enables the flock-master to
finish his sheep or lambs for the market cheaply and in fine form, since
this small grain factor, not necessarily more than half a pound a day,
whether given as wheat, rye, barley, oats or corn, puts the ration
practically in balance for the purpose named, and it may be given to the
sheep daily in troughs without taking them out of the pasture.
It is thought that there is more danger to cattle and sheep from grazing
on alfalfa than on any of the clovers, and probably such is the case.
But whether this is true or not, the danger is very considerable, and is
enhanced by the presence of frost as well as the presence of moisture,
from much succulence in the plants, from rain and from dew. So great is
the danger that the inexperienced should proceed with much caution in
such grazing. When bloat does occur, the method of dealing with it is
given on page 95.
The tendency to produce bloat in alfalfa pastures decreases with the
extent to which other grasses are present in the pastures. Should
alfalfa be grown, therefore, for the purpose of providing pasture, some
other grass or grasses should be sown along with it. Which of these
should be thus sown ought to depend chiefly on the adaptation of the
grasses for producing vigorous growth under the conditions present. In
the States east of the Mississippi and north of the Ohio, and in all of
Canada east from Lake Huron, alfalfa may be made an important feature in
pastures variously composed. For instance, on suitable soils alfalfa may
be made an important feature in pastures composed otherwise of medium
red and alsike clover and timothy. The author can speak from experience
as to the slightness of the danger from grazing cattle and sheep on such
pastures. In the Southern States tall oat grass could be sown with the
alfalfa, and probably orchard grass. In some areas alfalfa will maintain
its hold on lands smitten with Johnson grass, both producing freely. In
much of Kansas meadow fescue would answer the purpose, northward brome
grass would probably answer, and in some places timothy. In Idaho and
the States adjoining, tall oat grass, meadow fescue and orchard grass
will all be helpful, and in some of the mountain States it has been
found that when alsike clover is grown freely in alfalfa pastures, the
tendency to bloat is not only lessened in the animals grazing, but the
value of the pasture, especially for winter grazing, is greatly
improved.
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