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This study demonstrates that under environmentally relevant conditions, plasmids in soils may be transported across significant distances and may have the potential to spread antibiotic resistance to much larger areas.

Vadose Zone Journal March 01, 2015, Vol.14, vzj2014.06.0068. doi:https://doi.org/10.2136/vzj2014.06.0068

Soil spectroscopy is very attractive for retrieving soil hydraulic properties in subsurface hydrology. Spectral signatures at three spectral resolutions were used to retrieve soil hydraulic parameters and evaluated by HYPRES and Rosetta pedotransfer functions. Results indicated that the performance of estimations depends on the type of hydraulic parameter as well as the spectral resolution of the inputs.

Vadose Zone Journal March 01, 2015, Vol.14, vzj2014.07.0080. doi:https://doi.org/10.2136/vzj2014.07.0080

This study was conducted to characterize a coarse alluvial vadose zone. The characterized sediment was used to derive data across a wide moisture range on different size fractions combining the simplified evaporation experiment and the dew point method. The obtained data were compared with the mass-based gravel correction to test its accuracy.

Vadose Zone Journal March 01, 2015, Vol.14, vzj2014.08.0112. doi:https://doi.org/10.2136/vzj2014.08.0112

The accuracy of various calibration procedures of a soil moisture sensor used for real-time soil moisture monitoring was tested. Calibration equations developed using the soil’s cation exchange capacity may provide a suitable alternative to in situ calibration.

Vadose Zone Journal March 01, 2015, Vol.14, vzj2014.08.0114. doi:https://doi.org/10.2136/vzj2014.08.0114

Non-wetting soils exhibit irregular patterns of infiltration and moisture storage. We used a metric of fractional wetting to identify key climatic controls on seasonal patterns of non-wetting behavior.

Vadose Zone Journal March 01, 2015, Vol.14, vzj2014.10.0141. doi:https://doi.org/10.2136/vzj2014.10.0141

Average organic C content in master horizons of South African soils ranged from 16% in O horizons to 0.3% in C horizons, decreasing in the order O > A > G > B > E > C. Organic C correlated poorly with climate and topography, positively with rainfall and aridity index, and inversely with evaporation. It was impossible to estimate the organic C content in these master horizons using rainfall, evaporation, slope aspect, aridity index, or clay contents due to the low resulting coefficients of determination.

Vadose Zone Journal March 01, 2015, Vol.14, vzj2014.10.0143. doi:https://doi.org/10.2136/vzj2014.10.0143
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