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In sand pot experiment the toxicity of Co(II)-Gly and Co(II)-EDTA chelates to Lucerne (Medicago sativa L. cv. Vela) was investigated. The Co(II)-Gly chelate was definitely more toxic than the Co(II)-EDTA chelate. This chelate, more than the Co(II)-EDTA chelate, reduced the crop of dry matter of Lucerne, the content of nitrogen, protein and essential amino acids. It reduced the physiological efflciency...
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