Mettananda, K.A.2020-09-022020-09-022000-2001Tropical Agriculturist, 153:p.15-21https://dl-doa.nsf.gov.lk/handle/1/2635AgricultureBig onionAllium cepa L.Bulbing behaviourCultivar evaluationPhotoperiod extensionScreening techniquesSeed testingPlant physiologyUse of photoperiod in identifying suitable cultivars of big onion (Allium cepa L.) for the dry zone of Sri LankaArticle