Parameter Tree:
EARTH SCIENCE > AGRICULTURE > AGRICULTURAL CHEMICALS

 Definition:
A term used to designate chemical materials used in Agriculture such
as herbicides, insecticides, fungicides, and fertilizers. Does NOT include
food or feed additives, or animal hormones.

Reference:
Adapted from: Herren, R.V., and R.L. Donahue. 1991. The Agriculture
Dictionary, Delmar Publishers INC. Albany, New york. 553pp.