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Evaluation of KCl-EDTA-, CaCl2- DTPA-, CaCl2-DTPA-TEA extractants for estimating available Cu in soils
Published November 15, 2007

KCl-EDTA-, CaCl2-DTPA-, CaCl2-DTPA-TEA extraction
methods were compared to determine the plant available Cu
amounts in the soil samples. In the soil extracts, the amounts of
copper were measurable. In the buffered CaCl2-DTPA-TEA
extracts, data showed the lowest values.
On the applied soils, a corr...elation was observed between
plant removal and soil Cu using extractants mentioned above. The
closest correlation appeared in the case of sandy soils.
From the results of statistical analysis, it appears that soil
properties may play role in the efficiency of the extraction using
either CaCl2-DTPA or KCl-EDTA solutions.
To establish more reliable relations, further studies with
different types of soils are needed.

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