it, like the clapboards of a house. This harrow is as good as a roller
in fining and smoothing the surface soil. It is an excellent tool to
use alternately with a spike or coulter-toothed harrow on lumpy soil.
This tool rasps or grinds many of the lumps or clods which slip by the
harrow teeth and presses others into the ground so that the harrow
following can get a grip on them. It is a harrow that can be made on
any farm. This planker is an excellent tool to smooth the surface, for
broadcasting small seeds and for planting truck crops.


ROLLING

The objects of rolling are:

To compress the surface soil so that the harrow will do its work more
efficiently, also to break clods or lumps that may have resisted the
action of the harrow.

To smooth the surface of the soil for an even distribution of small
seeds, and to firm the soil around such seeds after they are planted
so that they will keep moist and sprout readily.

To give compactness to soils that are light and loose and thus enable
them to hold moisture and plant food better.

To press into the ground the roots of plants partly dislodged by the
frost.

To remove the conditions favorable to the development of many kinds of
insects.