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This study aims to develop a bibliographic review of researches that address the changes in soil structure and grain yield in areas compacted by the action of machine traffic in no-tillage system. Based on the studies analyzed, it is considered that the soil is composed of mineral, organic fractions and void space. The arrangement of components influences the air and water conduction and storage capacity of the system. Management practices change the soil structure, either by compaction action imposed by traffic or by the tillage action resulting from sowing mechanisms and, under intensive soil management, by plowing/chiseling. When plant root system growth is restricted by the presence of compacted layers, its development is impaired. The structure of soil pores can be formed by the action of the root system of successor plants, soil fauna and / or mechanized implements. Under conditions of conservation use systems, crop rotation enables the formation of continuous pores, important for hydraulic conductivity and gas exchange with the atmosphere. Finally, crop rotation provides soil surface protection and enables better soil structural conditions.

Compactação do solo em Sistema de Plantio Direto na palha