Barbour, EK., Salman, SH., Baalbaki, RZ., Sagherian, VK., Root yield of Echinacea purpurea (L.) Moench in relation to spacing and preservation of pressed root juice
, Biological Agriculture and Horticulture 2003 22 :133-141.
Yield of fresh and dry Echinacea purpurea (L.) Moench (Purple coneflower) roots was evaluated in relation to spacing in solarized soil in a semi-arid Mediterranean region, and the change in microbial contamination of pressed fresh root juice, preserved in honey and ethanol, was compared for a period of 1 year. The concluded results; row spacing of 50 cm, in conjunction with soil solarization, was most efficient for root production of Echinacea purpurea (L.) Moench. Also, root juice preservation in organic honey and preservation in Ethanol produced similar results in terms of prevention of microorganism proliferation, over a one-year period.