Content and distribution of iron in a calcareous chernozem soil after long-term fertilization
2009
Žarković, B., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Blagojević, S., Faculty of Agriculture, Belgrade - Zemun (Serbia)
The purpose of this investigation was to determine the effect of long-term application of mineral and organic fertilizers (beef manure and cornstalks) on the content and distribution of iron in a calcareous chernozem soil. For this purpose soil samples were taken from an experimental field of the Maize Research Institute in Zemun Polje (Belgrade, Serbia). Contents of total and available iron were determined by atomic absorption spectrophotometry after preparation of the samples for the analysis. Basic agrochemical properties were determined by applying standard methods of soil analysis. Variants where manure was applied alone or in combination with cornstalks have significantly higher content of total iron in relation to the control. Increase of total iron in these variants could be noticed till the depth of 80 cm. The investigated experimental variants have relatively low content of available Fe. Application of organic fertilizers caused increases in available iron content in relation to the unfertilized variant of the experiment. Results of correlation analysis indicate that none of the basic agrochemical properties has significant influence on the content of total iron. Statistically significant correlations were found between available iron on one hand and contents of humus and calcium carbonate on the other (r = 0,48 and r = -0,46, respectively).
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