The present study was conducted to investigate the effects of different irrigation levels (100, 75, 50 and 25% of field capacity) on above and underground organic biomass production of commonly grown Hungarian vetch (Vicia pannonica Crantz) and field pea (Pisum arvense L.). Experiments were carried out in laboratories in Field Crops Department of Çanakkale Onsekiz Mart University between the dates 15.11.2014 and 15.05.2015