The soil compaction curve is determined by the Proctor test, normal or modified, widely used in civil engineering, however, its use has agronomic limitations, since the configuration of the curved part of the reuse of a single sample, disregarding the original soil structure. In this context, the objective of the study was to evaluate the configuration of the compaction curve based on with and without reuse of samples of an Oxissol, considering different management systems. While comparing the procedure with and without reuse of the sample, it was found that regardless of managements and layers evaluated, curves of soil compaction obtained were different. Furthermore, the procedure to reuse samples increases the density of the soil due to fragmentation of the aggregates and reorganization of its particles. Thus, for agricultural purposes, the compaction curve is suitably characterized without reuse of samples, since with this test, the aggregates of the sample, are not fully fractionated, both aggregates from soil under native vegetation or anthropized areas.
optimum moisture for compaction; maximum density of compaction; standard Proctor; aggregate stability; soil organic matter
