The objetive of this work was to evaluate the value of resistance to penetration limit to dry land rice yield (Oryza sativa cv. IAC 165) grown in soil with water content at tension of 0.05 and 0.01MPa. Soil was sampled at 0.00-0.20m depth in Haplustox, medium texture (LVd) and Eutrustox, clayey (LVef) and compacted in layers of 0.03m in pots of 0.20m height and 0.25m diameter (0.00982m³). The values of resistance to penetration were measured by dinamometric ring penetrometer. The experiment was complete randomized, in a 4 x 2 factorial, with 3 replications. For the water content at tension of 0.01MPa, the value of resistance to penetration limit to dry land rice yield was 2.38 and 2.07MPa, respectively, for LVd and LVef. Higher rice yield was obtained in smaller value of resistance to penetration in water content at tension of 0.05MPa. The dry land rice was less productive in soil with water content at tension of 0.05MPa.
Oryza sativa; soil compaction; soil water content
