An interesting feeding experiment was conducted on a farm at Rochelle,
Ill. On September 7, 1913, 29 head of 2-year-old steers, averaging
836 pounds, were turned on 40 acres of sweet clover which had been
seeded that spring with barley. These animals were pastured on the
sweet clover until November 1 without additional feed. During this time
they made exceptionally large gains. From November 1 to December 11,
28 head of these steers had access to an 80-acre field of cornstalks.
On December 11 they were put into the feed lot. During the time these
steers were on the cornstalks they barely held their gain, but during
the first 30 days they were in the feed lot they made an average daily
gain of almost 3 pounds. In this period they received 215 bushels of
corn-and-cob meal and 16-3/4 tons of silage made from the first-year
growth of sweet clover. During the next 30 days they received 388
bushels of corn-and-cob meal and much less sweet-clover, silage.
During this time they made an average daily gain of 2 pounds. When the
corn-and-cob meal ration was increased the steers ate less silage.
These cattle dressed 55-1/8 per cent at a Chicago packing house.
SWEET CLOVER AS A SOIL-IMPROVING CROP.
Unlike many legumes, sweet clover will make a good growth on soils too
depleted in humus for profitable crop production. In addition to its
ability to grow and to produce a considerable quantity of forage on
such soils, it will add much humus to them. The extensive root systems
do much toward breaking up the subsoil, thereby providing better
aeration and drainage. The effect of the large, deep roots in opening
up the subsoil and providing better drainage is often very noticeable
in the spring, as the land upon which sweet clover has grown for
several years will be in a condition to plow earlier than the adjacent
fields where it has not been grown. The roots are often one-eighth of
an inch in diameter at a depth of 3 feet, and they decay in five to
eight weeks after the plants die. (Figs. 12 and 13.) The holes made by
the roots are left partly filled with a fibrous substance which permits
rapid drainage. Sandy soils are benefited materially by the addition
of humus and nitrogen, while hardpan often is broken up so completely
that alfalfa or other crops will readily grow on the land. The roots
add much organic matter to the layers of soil below the usual depth of
plowing, while those in the surface soil, together with the stubble
and stems, when the crop is plowed under, add more humus than possibly
any other legume which may be grown in short rotations. Not only does
this crop add organic matter to the soil, but in common with other
legumes it has the power of fixing atmospheric nitrogen by means of the
nitrogen-gathering bacteria in the nodules on the roots.
Public-domain text, read in full here on John Shaqi.
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