h
grown on the hills in Wales, where by its roots spreading from stone to
stone it is often found to prevent the soil from being washed off, and
has been known to keep a large district fertile which would otherwise be
only bare rock. Sheep are particularly fond of it. About four pounds
sown with other seeds for pasture, will render a benefit in any
situation that wants it. Twenty-four pounds is usually sown on an acre
when intended for the sole crop, and sown under corn.

51. POTERIUM Sanguisorba. BURNET.--This plant grows in calcareous soils,
and is in some places much esteemed. On the thin chalky soils near
Alresford in Hampshire, I have observed it to thrive better than almost
any other plant that is cultivated. Sheep are particularly fond of it;
and I have heard it said that the flavour of the celebrated Lansdown
mutton arises from the quantity of Burnet growing there. It is also the
favourite food of deer. This will grow well in any soil, and
there are few pastures without it but would be benefited by its
introduction. Twenty-five pounds per acre are sown alone: eight pounds
mixed with other seeds would be sufficient to give a good plant on the
ground.

52. SANGUISORBA officinalis. GREAT CANADA BURNET.--Cattle will eat this
when young; and it has been supposed to be a useful plant, but I do not
think it equal to Burnet.

It is perennial, and is often found wild, but has not yet been
cultivated.

53. TRIFOLIUM pratense. RED CLOVER.--This is a very old plant in
cultivation, and perhaps, with little exception, one of the most useful.
It is very productive and nutritive, but soon exhausts the soil; and
unless it is in particular places it presently is found to go off, which
with the grazier is become a general complaint of all our cultivated
Clovers. It is also well known, that if the crop is mown the plant is
the sooner exhausted.

Seeds of Clover have the property of remaining long in the ground after
it has become thus in a manner exhausted; and it frequently occurs that
ashes being laid on will stimulate the land afresh, and cause the seeds
to vegetate; which has given rise to the erroneous opinion with many
persons, that ashes, and particularly soap ashes, will, when sown on
land, produce Clover.

Red Clover is usually cultivated in stiff clays or loamy soils; and when
sown alone, about sixteen or eighteen pounds of seed are used for the
acre.

54. TRIFOLIUM medium. ZIGZAG, or MOUNTAIN-CL