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The objective of this study was to evaluate the diffusivity and the saturated and unsaturated hydraulic conductivity in a Oxisol and its impact on water infiltration in the conventional tillage system and direct cultivated with corn.. The study was conducted in areas located at the Federal Institute Goiano Campus Rio Verde, GO. Treatments: 1) conventional tillage system; 2) no-till system. The experimental design was completely randomized with eight repetitions. The methodology used was the infiltrometer of concentric rings. The setting of the parameters of the equations representing the model for the soil was performed using the RETC version 6.02 application. Was regarded as the water content, hydraulic capacity hydraulic conductivity unsaturated soil, water content and effective diffusivity versus the logarithm of the pressure load. The hydraulic conductivity in no-tillage system was 7.2% higher than that observed in the conventional tillage system; The hydraulic capacity was found to be higher in conventional tillage which is 9.1% higher than that found in no-tillage; The initial hydraulic diffusivity in no-tillage system was 16% higher than conveniconal planting system.

Influência da difusividade e condutividade hidráulica na infiltração de água em um latossolo vermelho sob diferentes sistemas de cultivo