On February 15th and 16th, the dealership Agrimaq held a demonstration of the tractor ST MAX 180 and the 11-rods ripper Fox at the farm Nossa Senhora Aparecida, which belongs to Fabiano Léo Rockembach and his son Alexandre Rockembach and is located in the city of Nova Mutum, state of Mato Grosso. The work was carried out before planting corn in a plot of 8.2 ha, demarcated to be harvested individually for analyzing the results of scarification. The average depth was 28 cm with a speed of 6.5 km / h and manipulated soil is 30% clay.