R. SINGHSHAKTAWATI and K. BANSAL, “Effect of different organic manures and nitrogen levels on growth and yield of sunflower (Helianthus annuus)”, Indian J Agri Sci, vol. 69, no. 1, Jan. 2013, Accessed: Oct. 28, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/26181