TY  - JOUR
AU  - Farahvash, Farhad
TI  - Effect of foliar application of zinc sulfate and ascorbic acid on growth and essence yield
of medicinal plant of Echinacea purpurea (Purple coneflower) under drought stress
JO  - Journal of Plant Ecophysiology
VL  - 8
IS  - 25
SP  - 53
EP  - 64
PY  - 2016
DO  - 
ER  -