Mettananda, K.A.2022-02-092022-02-092003Annals of the Sri Lanka Department of Agriculture, 5:p.181-192https://dl-doa.nsf.gov.lk/handle/1/4175PLANT SCIENCE AND PRODUCTIONOnion set productionPhotoperiod extensionTropical onionEffects of extended photoperiod on "dry set" production of big onion (Allium cepa L.)Article