It varies in colour from yellow to
brown, and is commonly found in old pastures: it may also be remarked,
that where any perennial species of Clover (Trifolium) are found wild,
it is almost a certain indication of a fertile loam, and such as
contains the proper food of plants in abundance.
Bog-mould--is frequently found on waste lands, where Heaths (Ericae) are
produced: it is composed of decayed vegetable matter and white sand. The
best sort is light when dry, of a black colour, and easily reduced to
powder. Care should be taken to distinguish it from Peat, which is hard
when dry, destitute in a great measure of the sand, and mostly of a red
colour. This contains in great quantities sulphureous particles and
mineral oil, which are known to be highly destructive to vegetation.
The mould formed from rotten leaves is a good substitute for bog-mould
if mixed with sand, and is often made use of for the same purposes.
These earths should be dug from the surface to the depth of a few inches
and laid in heaps, that the roots, &c. contained therein may be
decomposed: and before they are used should be passed through a coarse
screen, particularly if intended for plants in pots.
As loam has been found to contain the greatest portion of the real
pabulum of plants, it has long been used for such as are planted in
pots; and the component parts of bog-earth being of a light nature, a
mixture of the two in proper proportions will form a compost in which
most kinds of plants will succeed.
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