Police said the find was part of a bigger investigation that led to the arrest of 16 people and seizure of 1.2 tons (1.1 metric tons) of marijuana
Officers discovered the hemp field in the northeastern canton (state) of Thurgau last year while investigating an alleged drug ring, said the head of Zurich police's specialist narcotics unit Norbert Klossner.
The plantation, measuring almost two acres (7,500 square meters), was hidden inside a field of corn. But officers using Google Earth to locate the address of two farmers suspected of involvement in the drug operation quickly spotted the illegal crop.