Tillage treatments under review were: conventional tillage (CT), no-till (NT), minimum tillage (MT) and soil compaction (CP). Our review indicated that the bulk density (BD) in plots under CT was not significantly different (p < 0.05) from the value of BD in plots under minimum tillage (MT) within the 0–5 cm soil layer, but was highest in soils under compaction due to traffic passes of heavy duty equipment. Soils under no-till were characterized with lowest bulk density within the 0–5 cm layer, but gradually increased in BD within the 10–20 cm soil layer, which offers the soil some structural stability.