Plants, 5.
and the farmer, 5.
conditions for growth, 6.
composition of food of, 63.
for study, 6.
living, growing things, 6.
parts of, 6.
resemble one another, 6.
why raised, 6.
work of in making soils, 36.

Plow beam, 93.
coulter, 94.
characteristics of, 95.
clevis, 93.
cutting roots, 15.
draft ring, 93.
handles, 93.
jointer, 95.
landside, 94.
mouldboard, 94.
parts of, 92.
shackle, 93.
share, 93.
standard, 92.
truck, 95.

Plowing, 90.
depth of, 96.