Navid Rahmani, Jahanfar Daneshian, Hossein Aliabadi Farahani. Effects of nitrogen fertilizer and irrigation regimes on seed yield of calendula (Calendula officinalis L.). Global Journal of Plant and Soil Sciences [Internet]. 2018 Apr. 19 [cited 2025 Jun. 16];2(1):85-9. Available from: https://elixirpublishers.in/index.php/aab/article/view/827