Effect of Nitrogen fertilizer, weed control and seed rate on incidence and severity of narrow brown leaf spot in rice cultivation under the dry zone of Sri Lanka
W. M. D. M. Wickramasinghe,
T. D. C. Priyadarshani,
U. S. Herath,
W. C. P. Egodawatta,
D. I. D. S. Beneragama,
U. G. A. I. Sirisena
