back and sharp in front and is called the shin of the plow from its
resemblance to the shin bone. The coulter is sometimes made in the
form of a sharp, revolving disk (Fig. 53), called a rolling coulter.
This form is very useful in sod ground and in turning under vines and
tall weeds. It also lessens the draft of the plow.

_A jointer_ or skimmer which skims stubble and grass from the surface
of the soil and throws them into the bottom of the furrow where they
are completely covered. The jointer helps also to pulverize the soil.

_A truck_ or wheel, attached under the end of the beam. This truck
makes the plow run steadier. This is sometimes used to make the plow
run shallower by setting it low down. This is not right, for it then
acts as a brake and makes the plow draw harder. The depth of the
furrow should be adjusted at the clevis.

A plow not only has parts but it has character also.


CHARACTERISTICS OF A GOOD PLOW

A good plow should be strong in build and light in weight.

The draft should be as light as possible.

The plow should run steadily.

A good plow should not only turn the soil but should pulverize it as
well.