The lowest bulk density (b) value of 1.28 Mg m−3in 0–5 cm soil depth wasmeasured in OP land use system, and it was significantly lower (P < 0.01) than thatof 1.54 Mg m−3in IR land use and that of 1.53 Mg m−3in RF land use (Table 1). Bulkdensity generally showed an increasing trend in most land uses. However, it did notdiffer among all land use systems in lower depths (Table 1).