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We examine the physical properties of a range of peat-based growing substrates under forest nursery conditions and show that substrate performance is dependent on irrigation management. To optimize seedling growth, the diffusivity of gases in root plugs needs to be considered when manufacturing and using nursery substrates.

Vadose Zone Journal March 01, 2014, Vol.13, vzj2013.05.0081. doi:https://doi.org/10.2136/vzj2013.05.0081

A field-scale infiltration experiment was conducted in coarse conglomeratic soil with high gravel fraction. Unsaturated flow properties were estimated from modeling of infiltration using the van Genuchten–Mualem model and a Metropolis–Hasting optimization scheme. Results provide optimal unsaturated flow parameters for a soil type that is underrepresented for vadose zone flow.

Vadose Zone Journal March 01, 2014, Vol.13, vzj2013.05.0096. doi:https://doi.org/10.2136/vzj2013.05.0096

Extensive high quality capillary pressure hysteresis data are reported for consolidated sandstones using a new form of semiautomated porous plate apparatus that records inflow–outflow rates. Hysteresis is related to fluid distributions, percolation effects, and trapping. Detailed consideration is given to the form of initial versus residual nonwetting phase saturations.

Vadose Zone Journal March 01, 2014, Vol.13, vzj2013.06.0097. doi:https://doi.org/10.2136/vzj2013.06.0097

A field experiment was performed in a grassland near Millbrook, NY. Intensive measurements of L-band brightness temperatures, surface temperature, and soil moisture and temperature were collected during three different passes. The research investigates changes in the performance of microwave soil moisture retrieval with diurnal soil temperature variations.

Vadose Zone Journal March 01, 2014, Vol.13, vzj2013.06.0101. doi:https://doi.org/10.2136/vzj2013.06.0101

Here we document the presence of aqueous FeS clusters in variably saturated sediments and discuss potential implications of an aqueous FeS phase on iron and sulfur cycling in the vadose zone. Data show a relationship between the presence of FeS clusters, the formation of soil aggregates, and a subsequent decrease in hydraulic conductivity.

Vadose Zone Journal March 01, 2014, Vol.13, vzj2013.07.0136. doi:https://doi.org/10.2136/vzj2013.07.0136

Magnetic resonance imaging is becoming an important tool in the agricultural sector. Diffusion tensor imaging (DTI), until recently mainly a neuroscience tool, was used to provide in situ three-dimensional images of plant roots grown in small pots. The DTI experiments were able to map roots and shoots.

Vadose Zone Journal March 01, 2014, Vol.13, vzj2013.08.0158. doi:https://doi.org/10.2136/vzj2013.08.0158

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Vadose Zone Journal March 01, 2014, Vol.13, vzj2013.reviewers. doi:https://doi.org/10.2136/vzj2013.reviewers
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