The Book of Alfalfa: History, Cultivation and Merits: Its Uses as a Forage and FertilizerCoburn, F. D. (Foster Dwight)
History
The Book of Alfalfa: History, Cultivation and Merits: Its Uses as a Forage and Fertilizer
Coburn, F. D. (Foster Dwight)
Alfalfa
The practice of sowing a nurse crop with alfalfa was inaugurated when
the nature of the plant was not as well understood as now. It was also
somewhat on the theory too that “a half-loaf is better than no bread.”
It began when there was a good deal of doubt about “getting a stand,”
and the farmer thought no doubt that a crop of oats or barley would pay
for the plowing even if the alfalfa failed. While the practice is
continued by many, the prevalent later method is to provide no nurse
crop. Few who have abandoned the nurse crop have returned to it. The
alfalfa plant does not need protection from the sun, nor is it bettered
by dividing any of the soil moisture or fertility with those of another
crop. On the other hand, if alfalfa is sowed in the spring, it is
important that it obtain an early start in order that its roots can
quickly work their way down into the moisture of the subsoil, against
the dry days of July and August. When a nurse crop of any vigor is
removed the alfalfa plants are likely to be found weak, spindling and
with little root growth; the nurse crop also has taken up some of the
soil nitrogen needed by the young alfalfa; or if the nurse crop is
heavy and has lodged, there will be left bare spots, where the alfalfa
has been smothered out.
Cutting the nurse crop is likely to be attended with no little damage to
the tender alfalfa plants by trampling their crowns into the ground, or
by breaking them off. Practically all the experiment stations favor
sowing alone. With few exceptions the second and third years have
brought heavier yields where no nurse crop was used. The theory that the
nurse crop will prevent the weeds choking the alfalfa is apparently, as
a rule, not well founded. In the first place alfalfa should not be sown
on foul land, and in the second place proper disking and harrowing, at
near intervals for four or six weeks before sowing, will disturb or kill
far more weeds than can any nurse crop. Besides, the oats or barley sown
as a nurse will when cut leave weeds in good growth, or dormant and
ready to spring up as fast or faster than the alfalfa. No nurse crop is
ever used with fall sowing. When ground has been thoroughly prepared for
the preceding crop, and then properly cared for, and made ready for the
alfalfa by the preliminary weed destruction, it will be found advisable
to sow alfalfa alone, even in the spring.
INOCULATING THE SOIL
Public-domain text, read in full here on John Shaqi.
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