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Original scientific paper

https://doi.org/10.18047/poljo.25.1.6

COMPARISON OF AA AND MEHLICH 3 METHODS FOR CALCIUM AND MAGNESIUM EXTRACTION FROM EASTERN CROATIA SOILS

Božica Japundžić-Palenkić ; College of Applied Sciences in Slavonski Brod, Dr. M. Budaka 1, 35000 Slavonski Brod, Croatia
Vladimir Zebec orcid id orcid.org/0000-0001-5798-6606 ; Josip Juraj Strossmayer University of Osijek, Faculty of Agrobiotechnical Sciences Osijek, V. Preloga 1, 31000 Osijek, Croatia
Nataša Romanjek Fajdetić ; College of Applied Sciences in Slavonski Brod, Dr. M. Budaka 1, 35000 Slavonski Brod, Croatia
Mihaela Blažinkov ; College of Applied Sciences in Slavonski Brod, Dr. M. Budaka 1, 35000 Slavonski Brod, Croatia
Slavica Antunović ; College of Applied Sciences in Slavonski Brod, Dr. M. Budaka 1, 35000 Slavonski Brod, Croatia
Domagoj Rastija ; Josip Juraj Strossmayer University of Osijek, Faculty of Agrobiotechnical Sciences Osijek, V. Preloga 1, 31000 Osijek, Croatia


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Abstract

Calcium and magnesium belong to a group of alkaline earth metals from lithosphere moderately mobile macronutrients which play an important role in plant nutrition. The aim of this paper was to compare quantities of extracted calcium and magnesium by ammonium acetate (AA) and by Mehlich 3 (Mehlich3) solutions from soils of eastern Croatia. The samples of the most representative soil types were gathered in five counties of eastern Croatia in 2012. After measuring the pH value and the overall carbonates being in soils, samples have been arranged into groups with less than 3.5% and more than 3.5% CaCO3. It was determined that Mehlich 3 method extracts more calcium and magnesium than AA method and differences were especially pronounced for calcium in soils containing more carbonates. In soils with less CaCO3 the statistically very significant correlation (P≤0.01) was determined between AA and Mehlich 3 methods regarding extracted calcium and magnesium. The results of these studies confirmed significant correlation (P≤0.01) between Mg AA and Mg Mehlich 3 methods in soils with more than 3.5% CaCO3 making both methods suitable for Mg determination regardless the soil CaCO3.

Keywords

AA method, Mehlich 3 method, calcium, magnesium, pH, CaCO3

Hrčak ID:

221096

URI

https://hrcak.srce.hr/221096

Article data in other languages: croatian

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