Rapid industrialization, population explosion, ineffective and insufficient pollution control and indiscriminate use of chemical fertilizers and pest control agents, are the primary source of heavy metal contamination in agricultural soils. Plants accumulate heavy metals from the soil (metal mining, smelting, chemical fertilizers and pesticides), water (heavy metal residues) or air (coal mining) etc. Plants are being grown in the contaminated soil, most of the time unknowingly, toxic heavy metals from these polluted soil may accumulate in the plant and vegetables grown in them (especially
underground part) thereby entering into the human food chain (Pip, 1991; Kurz et al., 1999; Wong, 1997).
Rapid industrialization, population explosion, ineffective and insufficient pollution control and indiscriminate use of chemical fertilizers and pest control agents, are the primary source of heavy metal contamination in agricultural soils. Plants accumulate heavy metals from the soil (metal mining, smelting, chemical fertilizers and pesticides), water (heavy metal residues) or air (coal mining) etc. Plants are being grown in the contaminated soil, most of the time unknowingly, toxic heavy metals from these polluted soil may accumulate in the plant and vegetables grown in them (especially
underground part) thereby entering into the human food chain (Pip, 1991; Kurz et al., 1999; Wong, 1997).
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