The experiment started in September 2009, in randomized blocks,
with four replications and six treatments, resulting in 24 plots with dimensions
of 8 × 6 m each. The treatments consisted of the time the soil
was kept under NT, after themechanical chiseling operation: C24, continuous
NT for 24 months, after chiseling carried out in September 2009;
C18, continuous NT for 18 months, after chiseling carried out in March
2010; C12 continuous NT for 12 months, after chiseling carried out in September
2010; C6, continuous NT for 6 months, after chiseling carried out