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Biological Trace Element Research • 2013 | View Paper
“Both the spontaneous activity and the potassium contracture are depressed by several transition metal ions such as manganese, nickel, cobalt or iron.”
“Addition of iron to soil decreased potassium , sodium and magnesium contents in spinach markedly (p<0.05), while the contents of zinc, manganese and copper in spinach were not significantly altered (p>0.05).”