Effects of Vermicompost Application on Physiological and Merphological Triats of Medicago rigidula L., Medicago polymorpha L. and Onobrychis sativa L

The use of bio-fertilizers may due to heavy metals immobilization in the soil. This research has been conducted based on a factorial experiment in a completely randomized design with four replications in Malayer University. Pots contained a mixture of soil and different amounts (0 and 60% by weight) of vermicompost as bio fertilizer. Plants exposed to cadmium nitrate concentrations (0, 4 and 8 mmol per kg). The results showed that by increasing the concentration of cadmium root length and plant height significantly (P