Improvement of Echinacea purpurea performance by integration of phosphorus with soil microorganisms under different irrigation regimes

Biological yield and physiological indices of Echinacea purpurea were investigated in a split plot field experiment and a randomized complete block design with three replicates and two harvests in 2016 and 2017. The main factor consisted of three irrigation regimes (irrigation after 25, 50 and 75% of available water depletion) and a sub-factor consisting of six different treatments of plant P (phosphorus) supply [control, 100% chemical P, 50%...