On the content of moving magnesium and the ratio of potassium and magnesium in field soils of Estonia
2001
Loide, V.
The research compared the moving magnesium contents identified by ammonium lactate (AL) methodology and by IN KCl- 0,025N CaCl2-extraction. The results show that the magnesium contents in soils identified by the 1N KCl and o,o25N CaCl2 extraction differ to a relatively small extent. Whereas the difference between the latter two and AL methodology is great. The difference is greater in case of soils that have high contents of calcium and specifically so in case Schachtschabel methodology is being used. In case of soils rich in calcium, some soils identified by the AL methodology are rich in magnesium but poor as identified by 0,025N CaCl2 extraction methodology and there is no plausible relation between the results of research. The plausible linear connection between magnesium contents identified by two methodologies appears in soils that contain moving calcium up to 2500 mg/kg. Therefore, the contents of magnesium identified by the AL and Schachtschabel methodology are only partly comparable since none of the methodologies have been worked out for soils rich in calcium
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