Abstract
Organic agriculture is a production system based on the principles of preserving or improving soil properties. Bulk density acts as an indicator of soil compaction, which significantly affects the physical properties and thus the water-air regime of soil. The structure is a key factor of soil fertility that is affected by a numerous factors and therefore easily subjected to change. The aim of this study was to determine the effects of organic and conventional production on aggregate stability and compaction of soil. The study was conducted on Vozar farm in the Kisac at three sites on chernozem, where the two adjacent fields of conventional and organic production were sampled. The considerable variability in the measured values of bulk density and aggregate stability was obtained. The compaction of chernozem was at the level of maximum allowable compaction or lower. The stable macroaggregates (> 250 µm) were dominated in the organic production compared to conventional due to the higher inputs of organic matter in organic production. Higher values of MWD were obtained in organic production compared to conventional and ranged from 319-591 µm. Organic production has dissimilar effects on the physical properties of the soil, which is often dependent on impact of external, usually climatic factors.
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