This is to be acquired in part by practice, and partly also by
reflection. For example, in digging over a piece of ground, it is a
common practice with slovens, to throw the weeds and stones on the
dug ground, or on the adjoining alley or walk, with the intention of
gathering them off afterwards. A better way is to have a wheelbarrow,
or a large basket, into which to put the weeds and extraneous
matters, as they are picked out of the ground. Some persons in
planting or weeding, whether in the open air, or in hothouses, throw
down all seeds, stones, and extraneous matters on the paths or
alleys, with a view to pick them up, or sweep or rake them together
afterwards; it is better to carry a basket or other utensil, either
common or subdivided, in which to hold in one part the plants to be
planted, in another the extraneous matters, &c.