Navid Rahmani, Jahanfar Daneshian, & Hossein Aliabadi Farahani. (2018). Effects of nitrogen fertilizer and irrigation regimes on seed yield of calendula (Calendula officinalis L.). Global Journal of Plant and Soil Sciences, 2(1), 85–89. Retrieved from https://elixirpublishers.in/index.php/aab/article/view/827