نتایج جستجو برای: rudbeckia

تعداد نتایج: 122  

Journal: :Journal of the American Society for Horticultural Science 1993

Journal: :Environmental pollution 2003
A H Chappelka H S Neufeld A W Davison G L Somers J R Renfro

Incidence and severity of visible foliar ozone injury on cutleaf coneflower (Rudbeckia laciniata L.) and crown-beard (Verbesina occidentalis Walt.) were determined along selected trails at three locations in Great Smoky Mountains National Park during the summers of 2000 and 2001: Clingmans Dome, Cherokee Orchard Road and Purchase Knob. Cutleaf coneflower exhibited a greater amount of foliar inj...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید