This Engineering Practice provides the SI units of measurement associated with quantities useful indescribing all types of radiation for agricultural engineering applications. As an aid in establishing uniformity inthe agricultural engineering literature, it also provides the generally accepted symbols which represent thosequantities and the approved symbols for the units of the SI system applicable to those radiation quantities. Theprincipal customary units that have been used for radiation quantities are also listed and factors are providedfor conversion of those customary units to SI units.
