Randomized seeding trial
From AMS Glossary
randomized seeding trial
A series of field tests expected to yield unbiased statistical data of the efficiency of a given agent used in cloud seeding.
Attempts are made to simulate chance distributions in order to reduce the effects of uncontrolled natural variability in meteorological and other external conditions. Also required are the delineations of a defined target area and an undisturbed, but otherwise similar, control area.