Evaluation of chemical extractants for determining the availability of iron manganese zinc and copper in different soils

Yousry M.

Egyptian Journal of Soil Science 20(2): 151-158


Accession: 005397081

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Soil samples of Egypt and Germany were studied. High CaCO3 content of the soil had a serious effect on the efficiency of the specific methods when using non-chelating reagents. DTPA was the most efficient general method for extracting all 4 micronutrients. Morgan's reagent gave mostly similar results to DTPA except in the case of Cu, while ammonium acetate pH 7.0 was the least efficient general method in most cases.