They penetrate the same to about 2 feet, but in some instances, as when
subsoils are open and well stored with accessible food, they go down to
the depth of 5 or 6 feet. The tap roots are numerously branched, and the
branches extend in all directions. When they are short, as they must
needs be in very stiff subsoils and on thin land underlaid with hard
soil, the branches become about as large as the tap roots. It has been
computed that the weight of the roots in the soil is about equal to the
weight of the stem and leaves. Medium red clover is ordinarily biennial
in its habit of growth, but under some conditions it is perennial.
Usually in much of the Mississippi basin it is biennial, especially on
prairie soils. On the clay loam soils of Ontario, Ohio, Michigan,
Wisconsin, Indiana and some other States, it i
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