Mineralogy and agrochemistry of magnesium in soils of Vojvodina, Sumadija and northern Pomoravlje [Serbia, Yugoslavia]
2001
Kostic, N.M. (University of Belgrade, Belgrade - Zemun (Yugoslavia). Faculty of Agriculture) | Jakovljevic, M.D. | Hadzic, V.B. | Protic, N.J.
This investigations has shown that the soils investigated have available Mg content between 10 and 93 mg/100 g, with an average of 40.8 mg/100 g and could be considered as Mg sufficient for plant production. Available Mg is primarily associated with carbonate fraction (dolomite) and to a lesser extent with exchangeable (clay minerals) and silicate forms (chlorite, mica, amphibole). Total content of Mg varies between 0.20 and 1.26%, with an average of 0.603%. The Ca/Mg ration has shown a large scale varation between 2.5:1 and 78.8:1. Only 10% of soils have Ca/Mg ratio lower then 5:1 or optimal ratio for plant nutrition, whilst 90% of soils were found to have the ratio above 5:1 which, in case of extremely high values, might be a limiting factor in plant growth and influence an adequate supply of Mg to animals and men. This investigation have pointed out a necessity of wider research in soil mineralogy and chemistry of Serbian soils, which are considered as one sufficient in available magnesium.
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