d with clay, and especially where the clay is
some distance from the surface, this clover is more certain to make a
stand, since the vigor of the plants enables them to gather food until
the roots go down into the clay.

In areas where the moisture is more or less deficient, the other
conditions being favorable, this clover can send its roots down into the
subsoil, where moisture is more abundant than on the surface. Because of
this power, it is better adapted than the medium red to much of the area
of Southwestern Minnesota, Western Iowa, Western Kansas and Nebraska,
and, in fact, much of the area bordering on the semi-arid country.

On clay soils that are so saturated with water that in the winter or
spring the clover is much liable to heave, there is conflict in opinion
as to whether the mammoth or the common red variety will heave the more
readily, but the preponderance of the evidence favors the view that the
roots of the mammoth variety can better resist such influences than
those of the common red.

This clover, like the common red, is not well adapted to hungry, sandy
soils, to the blow soils of the prairie, to the muck soils of the watery
slough, or to the peaty soils of the drained muskeg.

=Place in the Rotation.=--The place for mammoth clover in the rotation
is much the same as for the medium red variety. (See page 70.) It may,
therefore, be best sown on a clean soil; that is to say, on a soil which
has grown a crop the previous season that has called for clean
cultivation, as, for instance, corn, potatoes, sorghum, or one or the
other of the non-saccharine sorghums, field beans, soy beans, cow peas
and field roots. But it is not so necessary that it shall be made to
follow either kind of beans or cow peas as the other crops named, since
these have already gathered nitrogen, which is more needed by leguminous
crops. This clover should rather be grown in rotations where more
nitrogen is wanted, when the soil will profit by increased supplies of
humus, and where strong plants are wanted, the root growth of which will
have the effect of rendering the cultivated portion of the soil more
friable when stiff and more retentive when sandy, and that will have the
effect of opening up many little channels in the subsoil when the roots
decay, through which an excess of surface water may percolate into the
subsoil. It may precede such crops as revel in humus and that feed
ravenously on nitrogen. These include all the