Differences in soil electrical resistivity tomography due to soil water contents in an integrated agricultural system

Diferenças na tomografia da resistividade elétrica do solo devido aos níveis de água em sistema agropecuário integrado

Abstract:

The objective of this work was to characterize the spatial variability of soil electrical resistivity due to different soil moisture contents, in an integrated agricultural system. Soil electrical resistivity (ER) was measured with the Automatic Resistivity Profiling (ARP) contact sensor in two dates, in 2016, in a 9.7-ha area with different soil moisture contents. The obtained maps indicated that ER allowed delimiting the regions within the study area and pointing out differences in the movement and accumulation of water in the soil horizons. Although there is a trend of reduction in ER values with increasing soil moisture, the spatial correlation structure of ER is similar.

Index terms:
ARP system; soil sensor; soil water content