all growth, and the protection
from leaching, should equal any advantage arising from rotting the
bulky growth in the soil. In some regions it is not good practice to
plow down a heavy green crop on account of the excessive amount of acid
produced. When this has been done, the only corrective is a liberal
application of lime.

Mammoth Clover.--When clover is grown with timothy for hay, some
farmers prefer to use mammoth clover in place of the medium red. It may
be known as sapling clover, and is accounted a perennial, though it is
little more so than the red. It is a strong grower and makes a coarse
stalk but, when grown with timothy, it has the advantage over the red
in that the period of ripening is more nearly that of the timothy. It
inclines to lodge badly, and should be seeded thinly with timothy when
wanted for hay. The roots run deep into the soil, and this variety of
clover compares favorably with the medium red in point of fertilizing
power, the total root-growth being heavier. While its yield of hay,
when seeded alone, is greater than the first crop of the red, its
inclination to lodge and its coarseness are offsets. It produces its
seed in the first crop, and the after-growth is small, while red clover
may make a heavy second crop. Its use should become more general on
thin soils, its strong root-growth enabling it to thrive better than
the red, and the lack of fertility preventing the stalks from becoming
unduly coarse for hay. The amount of seed used per acre, when grown by
itself, should be the same as that of red clover.

Alsike Clover.--A variety of clover that may have gained more
popularity than its merit warrants is alsike clover. It is more nearly
perennial than the mammoth. The roots do not go deep into the subsoil
like those of the red or the mammoth, and therefore it is better
adapted to wet land. It remains several years in the ground when
grazed, and is usually found in seed mixtures for pastures. It is
decumbent, and difficult to harvest for hay when seeded alone. It is
credited with higher yields than the red by most authorities, but this
is not in accord with observation in some regions, and it is markedly
inferior to the red in the organic matter and the nitrogen supplied the
soil in the roots.

The popularity of this clover is due to its ability to withstand some
soil acidity and bad physical conditions. In regions where red clover
is declining on account of lack of lime, one may see som