Afsaneh, Pirmani, Mahmoudi Touraj Mir, Yazdan seta Saman, and Sharafi Soran. 2022. “Effect of Nitrogen Fertilizers on Agronomic, Essential and Enzymatic Properties of Marigold (Calendula Officinalis L.) under Normal and Drought Conditions”. Plant Science Today 9 (4):1049-57. https://doi.org/10.14719/pst.1860.