Gonçalves, Saulo Boldrini  Lopes, Eduardo da Silva  Cavalieri-Polizeli, Karina Maria Vieira  Fiedler, Nilton Cesar  Stahl, James  <br/><br/>
Red-Yellow Latosol Penetration Resistance Under Different Subsoiling Depths  

<br/><br/> Publicação on-line; 10 ref.; 2 illus; Summary (En) 
<br/><br/> <br/><br/>ABSTRACT<br/><br/>The objective of this work was to evaluate the penetration resistance (PR) of a red-yellow latosol<br/>submitted to two subsoiling depths for implanting a forest plantation. The subsoiling was evaluated<br/>at 40 cm (S-40) and 50 cm (S-50) of depth by determining the soil moisture and soil density,<br/>while soil PR was evaluated before and after subsoiling at five points transversely to the subsoiling<br/>line (furrow) up to a depth of 60 cm using an electronic penetrometer. The soil density in both<br/>treatments was not altered by soil management. Before soil preparation, the soil presented PR<br/>values above the critical limit in the 0 cm to 30 cm layers, and after subsoiling a reduction in<br/>those values was verified at depth. It can be concluded that the 50 cm (S-50) subsoiling depth<br/>is the most suitable for soil preparation in a forest stand implantation.<br/><br/>Keywords: soil preparation, compaction, penetrometer. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MANEJO DO SOLO<br/>COMPACTAÇÃO DO SOLO<br/>SOLO<br/>RESISTÊNCIA<br/>SUBSOLAGEM