ABSTRACT
Grain has been an important agricultural commodity
and primary food source for centuries. The present
distribution of the world’s population has made
strong demands on grain-handling technology. Irre-
spective of whether it is international trade or de-
mands within a country, grain needs low moisture
levels for safe storage. Drying has always been the
most common method of preserving grain. In the
days of premechanization of agriculture, enough
grain was usually stored by hanging ears of corn in
barn lofts and attics to meet the needs of a commu-
nity. As mechanization of agriculture spreads to meet
the needs of a population that was rapidly growing
and urbanizing, mechanical methods for drying large
quantities of grain were needed. Grain now travels
thousands of miles either in large grain-carrying ships
or in different types of carriers on wheels, and must
reach its destination in a high-quality state. Proper
drying of these huge quantities of grain is a prerequis-
ite to safe storage and delivery.