Essential Trace Metal (Zinc, Manganese, Copper and Iron) Levels in Plants of Medicinal Importance

T. M. Ansari, N. Ikram, M. Najam-ul-Haq, I. Fayyaz, Q. Fayyaz, I. Ghafoor and N. Khalid

Journal of Biological Sciences 4 ( 2 ): 95 - 99 , 2004