%0 Journal Article %T Evaluation response of photosynthesis of stevia plant (Stevia rebaudiana Var. Bertoni) to potassium humate and photoperiod %A Seyyed Fazel Fazeli Kakhki %A Goldani, Morteza %A Alireza Ghasemi Arian %J Indian Journal of Agricultural Research %@ 0367-8245 %D 2019