Fall-plowed ground ordinarily makes an ideal seed bed for spring
seeding. Soil which has been previously planted to a cultivated crop,
such as corn, is usually put in sufficiently good condition for
sweet clover by disking. Good success has been attained by merely
broadcasting the seed on sandy soil and scratching it in with a harrow.
Such a seed bed appears to be ideal when the seed can be covered
sufficiently to insure plenty of moisture. It must be remembered that
young sweet-clover plants are not drought resistant and that every
precaution should be taken in seasons of drought or on laud which
drought affects badly to so prepare the seed bed that the largest
quantity of moisture will be conserved.
Excellent stands have been obtained at times by double-disking native
prairie sod and either covering the seed with a harrow or sowing it
with a drill.
SEEDING.
The proper time to seed sweet clover should be determined by the
germination of the seed, the climatic conditions of the region, and
the condition of the seed bed at the time of sowing. When growing
under natural conditions, seed which has lain in the ground over
winter germinates in sufficient quantity during the following spring
to produce a stand. It is therefore assumed that since this seed has
passed the winter on or in the ground and has produced a good stand
the following spring, sweet clover may be sown at any time of the year
and a satisfactory stand obtained. Little is thought of the enormous
number of seeds which shatter from a single plant and fall on an area
not exceeding 5 or 6 feet in diameter. Single plants have produced as
many as 350,000 seeds (the approximate number in 1½ pounds), or about
10,000 seeds for each square foot of ground covered. It matters little
how many of these seeds germinate in the fall they mature or during the
following winter, when the seedlings will be killed by freezing, for
there will be enough viable seeds left in the ground to germinate when
conditions are favorable in the spring. Conditions are very different
when sweet clover is sown on cultivated soil at the rate of 5 to 20
pounds of seed to the acre--25 to 100 seeds to the square foot. When
this quantity is sown, it is necessary that it be planted at such a
time that the greatest number of seeds will germinate and produce
plants.
HULLED SWEET-CLOVER SEED.
Public-domain text, read in full here on John Shaqi.
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