Mu myaka yatambutse ndetse n'ubu, bamwe mu bahinzi b'imyumbati bavuga ko basarura hagati ya toni 10 na 20 kuri hegitari imwe.  Gusa kuri ubu abayobotse uburyo bushya bwo guhinga imyumbati, bahamya ko bashobora gusarura toni zisaga 50 kuri ya hegitari imwe.