Somayyeh ErfaniAlamdari, Mohammad Ali Rezaei, Farhad Farahvash, Mehrali MahmoodJanlou. EFFECTS OF NANO-POTASSIUM AND POTASSIUM SULFATE FERTILIZERS AND SALICYLIC ACID ON THE MORPHO-PHYSIOLOGICAL TRAITS OF MARIGOLD, CALENDULA OFFICINALIS L., UNDER DROUGHT STRESS. IJMA 2021, 10, 286-297.