Singh, Lokendra, and Tulsi Parajuli. “Changes in Seed Yield of Sunflower (Helianthus Annuus L.) in Relation to the Seed Rate and Method of Sowing”. International Journal of Environment 9, no. 2 (October 27, 2020): 23–32. Accessed April 24, 2024. https://nepjol.info/index.php/IJE/article/view/32499.