The aim of this study was to compare a commercially-available radio-frequency (RF) spectroscopy soil moisture sensor with an array calibrated research-grade water reflectometers in no-till irrigated corn field from June September 2020. RF probe consisted 12 sensors spaced at 4-inch intervals across 48 inches length, while the four deployed along profile 4, 12, 20, and 28 in. depth. Soil were in...

Unsaturated hydraulic conductivity (K) is a measurement of soil water-retaining ability in unsaturated soil. The properties are necessary to predict the movement water current study aims create an alternative experimental device estimate theKusing moisturesensors. set up was designed and fabricated order measure volumetric content using GS3 (Campbell) sensors at different heights. data obtained...

Abstract This paper shows the implementation of miniature sensors for soil moisture measurement and their integration in a root-inspired burrowing growing robot. Three kinds are combined to estimate water content soil: resistivity sensor composed two brass electrodes, commercial air humidity interfaced with by filter membrane PTFE polyester scrim, an RGB used visible reflectance spectroscopy. W...

Passive microwave remote sensing by the Soil Moisture and Ocean Salinity (SMOS) satellite enables observations of surface soil moisture at global scale. This involves a retrieval process that uses a radiative transfer model to relate satellite-observed radiances to geophysical variables such as soil dielectric constant and soil moisture. The L-MEB (L-band Microwave Emission of the Biosphere) ba...

Satellite soil moisture products, such as those from Advanced Microwave Scanning Radiometer (AMSR), require diverse landscapes for validation. Semi-arid landscapes present a particular challenge to satellite remote sensing validation using traditional techniques because of the high spatial variability and potentially rapid rates of temporal change in moisture conditions. In this study, temporal...

Spatially distributed soil moisture profiles are required for watershed applications such as drought and flood prediction, crop irrigation scheduling, pest management, and determining mobility with lightweight vehicles. Satellite-based soil moisture can be obtained from passive microwave, active microwave, and optical sensors, although the coarse spatial resolution of passive microwave and the ...