| This work had as its objective to study the optimum water range (OWR) of a Yellow Argisol of the coastal plains, planted with sugarcane, when subjected to different levels of compaction. For the laboratory tests soil samples with a non-preserved structure were used, removed from depths of from 0.20 m to 0.40 m and 0.40 m to 0.60 m, representing the AB and Bt horizons respectively. The treatments consisted of different soil densities represented by specimens contained in volumetric rings. The critical densities of the AB and Bt horizons for samples of upturned soil, were 1.84 and 1.63 Mg m-3 respectively. In undisturbed soil a critical density of 1.63 and 1.64 Mg m-3 was observed for the same horizons. However, the soil density at which root development... |
