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A modern alternative to reduce the effects of soil compaction by intensive agricultural machine traffic is the adoption of controlled machine traffic. The objective of this work was to implement and evaluate the effects of machine traffic control on grain crops in the Brazilian central plateau region. The work, carried out in farms of the Directed Settlement Program of the Federal District (PAD/DF), counted on researchers from the University of Brasília, Embrapa Cerrados, farmers and manufacturers of agricultural machinery. Given the experiences obtained, it can be reported that producers have a real need and interest in adopting control of machine traffic, driven by the high cost of compaction of soils to productivity and scarification. It is conclusive that implementing the technology has restrictive obstacles mainly referring to the adjustment of the gauge of tractors, harvesters and pulverized, not to mention multiple work widths between implements and accurate global positioning systems for the machines – items with little or no possibility of changes. Key-words: Compaction, Agricultural Mechanization, Controlled Traffic In order to cultivate increasingly larger areas and swiftly carry out agrarian operations, the size and weight of the machines has increased at a dizzying pace. This has corresponded with the proportional growth of traffic in the fields, caused by the subsequent seeding, greater infestation of pests and sicknesses, and the simple convenience of harvesters and trucks for transporting the product. Because of this, more than 80% of the cultivated area is run over by heavy farm machinery during the first and second grain harvests in Brazil. According to Roque et al. (2010), the intense frequency and disorder of the agricultural operations compact the soil. Furthermore, Fontana et al., (2016) state that the increase of density in compacted soil reduces the microporosity, the rate of water infiltration and biological processes of the soil, resulting in a decrease in the development and productivity of the plant cultures. Smith et al. (2014) explain that in a situation of haphazard machine traffic the operational costs increase because of the frequent necessity of using equipment to till the soil. According to studies by the Agricultural and Cattle Federation of the State of Gioás (FAEG, 2013), the effective operational cost for preparing the soil can increase the cost of soy production in the state by 14.4%. Chamen (2011), Masek et al. (2014) and Smith et al. (2014) describe an alternative for the optimization of production systems, which is the adoption of a traffic control of the machines on the farm, named CTF, which in Portuguese stands for controle de trafego de máquinas na fazenda, and translates to “traffic control of farm machinery.” According to Seixas and Souza (2007), the CTF method separates machine traffic zones from those of cultivation, concentrating the pressure of the wheels on specific and permanent paths within the

Control of machine traffic in grain producing properties of the Brazilian central plateau