Alters cereal crops
Crop-related charms were a series of spells devised to alter some characteristics of crops (most likely growth rate, shape, strength, etc.).
In mid-1998, the Ministry of Magic report A Study into Muggle Suspicions about Magic recommended that the International Confederation of Wizards impose an immediate ban on further crop-related charms until the fuss among Muggles about so-called "crop circles" — actually entries in the Annual International Wizard Gardening Competition — died down.
- Daily Prophet Newsletters (Mentioned only)