Comparison of magnesium determination methods as influenced by soil properties
Journal Title: ŽEMDIRBYSTĖ-AGRICULTURE - Year 2010, Vol 97, Issue 3
Abstract
The current study was designed to investigate magnesium content in the soil. Magnesium was determined by the A-L (Egner-Riehm-Domingo), calcium chloride (Schachtschabel, 0.0125 M CaCl2 1:20), potassium chloride (1 M KCl 1:10), ammonium acetate (1 M NH4OAc 1:10), Mehlich 3 methods and water soluble magnesium (1:5). The highest magnesium content in the soil was established using the A-L method, followed by calcium chloride, potassium chloride, ammonium acetate and Mehlich 3 methods, while the lowest content was measured using water extract. The correlations between magnesium content determined by calcium chloride, potassium chloride, ammonium acetate and Mehlich 3 methods were very strong – 0.96–0.99. The correlation between magnesium contents determined by these methods and A-L was obtained only in the case when the amount of magnesium determined by the latter method was below 500 mg kg-1. The content of magnesium depended on soil texture and pH. The lowest magnesium content was measured in sand and sandy loam soils, while the highest content was recorded for clay loam. Soil pH exerted the greatest influence on the magnesium content determined by the A-L method.
Authors and Affiliations
Gediminas Staugaitis, Rasa Rutkauskienė
Keywords
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