This paper deals with the ecological relationship between the condition of Ginseng rust spots,the reducing substances in the bed soil and the epidermis iron forms of Ginseng roots within the albic soil region of Jilin lava platform.The results showed that the concentrtion of reducing substances varied in different relief units.The active organic matter was markedly related to the illness index and become the major factor in the genesis of Ginseng rust spots.The enrichment of iron played the first important ...