Background and Objective: The goals of study were to recognize the effect of bio-fertilizers on some quantitative and qualitative traits of Valerian under drought stress. Materials and Methods: The experiment was conducted as split plot based on randomized complete block design with three replicationes at the Research Farm of Urmia during two successive seasons of 2015-2016 and 2016-2... https://thegreensjunglebeautyshops.shop/product-category/essence/