The harrow brings about conditions favorable to the even distribution
of seeds.

It is also the tool generally used to cover seeds sown broadcast.

Harrowing is generally done just before planting, and with some crops
just after, to cover seeds or to smooth the ground. Harrowing is also
done in the first stages of growth of some crops to kill weeds and
make a soil mulch. The harrow should always follow the plow within a
few hours unless it is desired to leave the land in a bare fall or
winter fallow. At other times of the year the lumps of earth are apt
to dry out and become hard and difficult to break. If there is but one
work team on the farm it is a good plan during the plowing season to
stop the plow in time to harrow the day's plowing before the day's
work ends.


HARROWS

There are several types of harrows in use. They may be classified
according to the style of their teeth or cutting parts; they are as
follows:

Rolling cutter harrows.

Spring-toothed harrows.

Spike-toothed harrows.

Coulter-toothed harrows.