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Vadose Zone Journal : Just Published

 
 

Accepted, edited articles are published here after author proofing to provide rapid publication and better access to the newest research. Articles are compiled into issues at dl.sciencesocieties.org/publications/vzj, which includes the complete archive.

Citation | Articles posted here are considered published and may be cited by the doi.

Kato, C., T. Nishimura, H. Imoto, and T. Miyazaki. 2011. Predicting soil moisture and temperature of Andisols under a monsoon climate in Japan. Vadose Zone J. doi:10.2136/vzj2010.0054

Current issue: Vadose Zone J. 16(4)



  • SPECIAL SECTION: LYSIMETERS IN VADOSE ZONE RESEARCH

    • K.R. Brye, A.L.M. Daigh and R.L. McMullen
      Seasonal Effects on Leachate Quality from an Ozark Highlands Managed Grassland Using Automated, Equilibrium-Tension Lysimeters

      In regions with concentrated broiler (Gallus gallus) production, land application is a useful means of managing broiler litter (BL). However, surface and subsurface water quality issues may arise when continued annual BL application to fields occurs for extended periods. The application of manure follows seasonal guidelines for surface water quality protection. The objective of this study was to evaluate the effects of BL rate (0, 5.6, and 11.2 Mg litter ha−1) and season on drainage and leachate water quality over an 8-yr period (2003–2011) in the Ozark Highlands with karst geology using automated, equilibrium-tension lysimeters. (continued)

      Core Ideas:
      • Lysimeters aid subsurface water quality assessments in long-term nutrient management plots.
      • Broiler litter rates affected few leachate quality parameters during a continuous 8-yr period.
      • Leachate water quality was affected by season during a continuous 8-yr period.

      doi:10.2136/vzj2016.09.0082
      Published: March 31, 2017



    • Gurbir Singh, Gurpreet Kaur, Karl Williard, Jon Schoonover and Jasjit Kang
      Monitoring of Water and Solute Transport in the Vadose Zone: A Review

      A number of contaminants including agrochemicals (fertilizers, pesticides), heavy metals, trace elements, and pathogenic microbes along with pharmaceuticals and hormones used in animal production move through the soil and are responsible for degradation of groundwater quality. Therefore, it is essential to sample soil solution for better understanding of movement and environmental fate of various contaminants in soils. We review different soil solution extraction samplers. The soil solution samplers discussed here are: drainage lysimeter or soil column, pan lysimeter, resin bags or membranes, wick lysimeters, suction cup, and suction plate. (continued)

      Core Ideas:
      • Soil solution sampling is essential to better understand water and solute movement in soils.
      • A review of different types of soil solution samplers is provided in this paper, including: drainage lysimeter or soil column, pan lysimeter, resin bags or membranes, wick lysimeters, suction cup, and suction plate.
      • Recent developments, modifications, and recommendation criteria are provided for selecting appropriate soil solution extraction samplers.

      doi:10.2136/vzj2016.07.0058
      Published: February 2, 2017



  • SPECIAL SECTION: NONINVASIVE IMAGING OF PROCESSES IN NATURAL POROUS MEDIA

    • Sheela Katuwal, Cecilie Hermansen, Maria Knadel, Per Moldrup, Mogens H. Greve and L.W. de Jonge
      Combining X-ray Computed Tomography and Visible Near-Infrared Spectroscopy for Prediction of Soil Structural Properties

      Soil structure is a key soil property affecting a soil’s flow and transport behavior. X-ray computed tomography (CT) is increasingly used to quantify soil structure. However, the availability, cost, time, and skills required for processing are still limiting the number of soils studied. Visible near-infrared (vis-NIR) spectroscopy is a rapid analytical technique used successfully to predict various soil properties. (continued)

      Core Ideas:
      • Vis-NIR can be used for estimation of soil physical and structural properties.
      • Structural parameters are better predicted using vis-NIR than pedotransfer functions.
      • Vis-NIR can be a fast and reliable method for predicting soils’ transport behavior.

      doi:10.2136/vzj2016.06.0054
      Published: April 20, 2017



    • Sarah Smet, Erwan Plougonven, Angélique Leonard, Aurore Degré and Eléonore Beckers
      X-ray Micro-CT: How Soil Pore Space Description Can Be Altered by Image Processing
      Core Ideas:
      • Thresholding X-ray soil images influences the resulting images.
      • Prior noise reduction improves the thresholding accuracy.
      • Local and global thresholding perform similarly when prior noise reduction is applied.
      • The local threshold interval choice determines the local segmentation quality.

      doi:10.2136/vzj2016.06.0049
      Published: March 20, 2017



  • SPECIAL SECTION: THE ROOT ZONE: SOIL PHYSICS AND BEYOND

    • Everton Alves Rodrigues Pinheiro, Quirijn de Jong van Lier and Klaas Metselaar
      A Matric Flux Potential Approach to Assess Plant Water Availability in Two Climate Zones in Brazil

      Predicting soil water availability to plants is important for agricultural and ecological models. Models that explicitly take into account root water uptake and transpiration reduction describe the ability of soil to supply water to plants based on soil hydraulic properties that depend on soil water content. The objective of this study was to further develop an existing single-layer root water uptake model based on matric flux potential to allow for multi-layer scenarios; and to illustrate its functionality using soil hydraulic properties from layered soils from two climate zones in Brazil: a semiarid zone and a humid zone. For each soil layer, the hydraulic properties were determined by inverse modeling of laboratory evaporation experiment data available for pressure heads between −165 and −1.5 m. (continued)

      Core Ideas:
      • A multi-layer root water uptake model is developed based on matric flux potential.
      • Soil hydraulic properties from two important ecological zones in Brazil are assessed.
      • Water supplying capacity to plants is higher in semiarid than in humid zone soils.
      • Reduction of root suction below −150 m does virtually not affect water availability.

      doi:10.2136/vzj2016.09.0083
      Published: April 20, 2017



    • Mutez A. Ahmed, Mohsen Zarebanadkouki, Katayoun Ahmadi, Eva Kroener, Stanley Kostka, Anders Kaestner and Andrea Carminati
      Engineering Rhizosphere Hydraulics: Pathways to Improve Plant Adaptation to Drought

      Recent studies have drawn attention to the role of mucilage in shaping rhizosphere hydraulic properties and regulating root water uptake. During drying, mucilage keeps the rhizosphere wet and conductive, but on drying it turns hydrophobic, limiting root water uptake. In this study, we introduce the concept of rhizoligands, defined as additives that (i) rewet the rhizosphere and (ii) reduce mucilage swelling, thereby reducing the rhizosphere conductivity. We tested whether selected surfactants behaved as rhizoligands. (continued)

      Core Ideas:
      • Mucilage exudation by roots modifies the hydraulic properties of the rhizosphere.
      • Rhizoligands are surfactants that rewet the rhizosphere and reduce mucilage swelling.
      • A reduction in mucilage swelling reduces rhizosphere hydraulic conductivity.
      • By managing rhizosphere hydraulic properties, we can improve plants’ adaptation to drought.

      doi:10.2136/vzj2016.09.0090
      Published: March 20, 2017



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