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Soil Science Society of America Journal : Just Published


Accepted, edited articles are published here after author proofing to provide rapid publication and better access to the newest soil science research. Articles are compiled into bimonthly issues at dl.sciencesocieties.org/publications/sssaj, which includes the complete archive. Citation | Articles posted here are considered published and may be cited by the doi.

Nouwakpo, S. K. and C.-H. Huang. 2012. A Fluidized Bed Technique for Estimating Soil Critical Shear Stress Soil Sci. Soc. Am. J. doi:10.2136/sssaj2012.0056

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Current issue: Soil Sci. Soc. Am. J. 79(3)


    • Peter M. Homyak, Krystal T. Vasquez, James O. Sickman, David R. Parker and Joshua P. Schimel
      Improving Nitrite Analysis in Soils: Drawbacks of the Conventional 2 M KCl Extraction

      Soil nitrite (NO2) is an important source of nitrous acid to the atmosphere as well an intermediate in nitrification and denitrification. Few studies, however, have directly linked NO2 pools with N emissions because NO2 is reactive and seldom detectable in soils. Here, we test whether the elusiveness of soil NO2 is due to its reactivity or to problems associated with conventional 2 M KCl extractions. We extracted acidic, neutral, and alkaline soils (pH 5.4– 8.2) in 2 M KCl, pH-8-adjusted 2 M KCl, and deionized water (DIW). (continued)

      Published: June 12, 2015

    • Robert P. Long, Scott W. Bailey, Stephen B. Horsley, Thomas J. Hall, Bryan R. Swistock and David R. DeWalle
      Long-Term Effects of Forest Liming on Soil, Soil Leachate, and Foliage Chemistry in Northern Pennsylvania

      Sugar maple (Acer saccharum Marsh.) decline disease, decreased growth, and regeneration failure have been related to a low supply of Ca and Mg. There is increased interest in augmenting cation availability via liming, but there is little information on the amounts of lime required and the longevity of the lime treatment. A single application of 22.4 Mg ha-1 of dolomitic limestone in 1985 at four forested sites in Potter County, PA has shown that soil, soil water, and sugar maple foliage chemistry are significantly altered by liming and the changes in soils and foliage persist as long as 21-yr post-treatment. By 2001, only 3 kg ha-1 of lime remained undissolved while increases in exchangeable Ca and Mg, and pH continued through 2006 at depths up to 35 to 45 cm. (continued)

      Published: June 12, 2015


    • Lana A. Clark, Trenton L. Roberts and Nathan A. Slaton
      Estimation of Mineralizable Nitrogen from 15N-Labelled Crop Residues using Alkaline-Hydrolyzable Nitrogen Methods

      Crop residues play a significant role in soil N cycling. The type of residue, C/N ratio, tillage, and soil moisture influence potentially mineralizable soil-N. This study was established to estimate the N mineralization potential of various crop residues using Direct Steam Distillation (DSD) and the Illinois Soil Nitrogen Test (ISNT). Corn (Zea mays L.), soybean (Glycine max L.), wheat (Triticum aestivum L.), rice (Oryza sativa L.), and grain sorghum (Sorghum bicolor L.) residues were grown in a greenhouse and labeled with 15N using 10 atom% 15N labeled-urea. (continued)

      Published: June 5, 2015


    • T. DeSutter, D. Franzen, Y. He, A. Wick, J. Lee, B. Deutsch and D. Clay
      Relating Sodium Percentage to Sodium Adsorption Ratio and its Utility in the Northern Great Plains

      Saturated paste derived sodium adsorption ratio (SARe) is not a routine procedure for soil testing laboratories in the northern Great Plains. The objective of this study was to determine the relationship between SARe, a solution-phase only extraction, and percentage of Na (%Na; Na/(Na+Ca+Mg+K), a solution phase plus exchange phase value using 1M ammonium acetate as an extractant. From the analysis of 1974 soil samples from the northern Great Plains, simple-linear and quadratic regressions were highly significant at predicting SARe from %Na data. Removal of outliers only slightly increased r2 values for both models. (continued)

      Published: June 12, 2015


    • J. Huang, R. Taghizadeh-Mehrjardi, B. Minasny and J. Triantafilis
      Modeling Soil Salinity along a Hillslope in Iran by Inversion of EM38 Data

      Electromagnetic (EM) induction has been used to characterize the spatial distribution of salinity. However, most studies have been undertaken to map the areal distribution of the average profile salinity using measurements of the apparent electrical conductivity (ECa, mS m−1). In this study, an EM38 was used to map the distribution of salinity with depth along a 26-km hillslope in central Iran. We generated electromagnetic conductivity images by inverting EM38 ECa data collected at various heights in the EM4Soil software. (continued)

      Published: June 12, 2015


    • Adrienne C. Nottingham, James A. Thompson, Philip J. Turk, Qiuchen Li and Stephanie J. Connolly
      Seasonal Dynamics of Surface Soil Bulk Density in a Forested Catchment

      Bulk density is a commonly measured property during field investigations of soils. Accurate and reliable bulk density measurements are critical for assessing soil quality as well as for converting mass-based measurements to volume-based values. Our objective was to determine if there are significant seasonal changes to the measured bulk density of surface soil horizons in a forested ecosystem. The frame method was used to measure bulk density at monthly intervals for 12 mo at 10 locations within a forested catchment. (continued)

      Published: June 12, 2015


    • Julius B. Adewopo, Maria L. Silveira, Sutie Xu, Stefan Gerber, Lynn E. Sollenberger and Tim Martin
      Long-Term Grassland Intensification Impacts on Particle-Size Soil Carbon Fractions:Evidence from Carbon-13 Abundance

      Proper management of grassland ecosystems for improved productivity can enhance their potential to sequester atmospheric CO2 in the soil. However, the direction and extent of soil C changes in response to improved grassland management or land-use conversion varies depending on the ecoregion or management practice. The objectives of this study were to: (i) assess the long-term (>20-yr) impact of grassland management intensification on soil C fractions after conversion of native rangelands to silvopasture and sown pasture ecosystems; and (ii) determine the contribution of sown grass species to soil C sequestration in both the labile and more stable soil C fractions. Experimental sites consisted of a gradient of management intensities ranging from native rangeland (lowest), to silvopasture (intermediate), to sown pasture (highest). (continued)

      Published: June 5, 2015

    • Virginia L. Jin, Marty R. Schmer, Brian J. Wienhold, Catherine E. Stewart, Gary E. Varvel, Aaron J. Sindelar, Ronald F. Follett, Robert B. Mitchell and Kenneth P. Vogel
      Twelve Years of Stover Removal Increases Soil Erosion Potential without Impacting Yield

      Corn (Zea mays L.) stover (non-grain aboveground biomass) in the US Corn Belt is used increasingly for livestock grazing and co-feed and for cellulosic bioenergy production. Continuous stover removal, however, could alter long-term agricultural productivity by affecting soil organic C (SOC) and soil physical properties, indicators of soil fertility and erosion potential. In this study, we showed that 12 consecutive yr of 55% stover removal did not affect mean grain yields at any N fertilizer rate (4.5, 6.3, and 6.0 Mg ha−1 for 60, 120, and 180 kg N ha−1 yr−1, respectively) in a marginally productive, rainfed continuous corn system under no-till (NT). Although SOC increased in the top 30 cm of all soils since 1998 (0.54–0.79 Mg C ha−1 yr−1), stover removal tended to limit SOC gains compared with no removal. (continued)

      Published: June 5, 2015

    • John D. Williams, Stewart B. Wuest and David S. Robertson
      Soil Water and Water-Use Efficiency in No-Tillage and Sweep Tillage Winter Wheat Production in Northeastern Oregon

      The productivity of rainfed winter wheat (WW, Triticum aestivum L.) depends on the efficient capture and storage of precipitation. In the semi-arid Pacific Northwest (PNW), USA, soil water is managed through a 14-mo fallow period to establish wheat before winter and maximize growth potential the following spring. The effects of soil management on soil water storage were investigated on a Walla Walla silt loam soil (coarse-silty, mixed, superactive, mesic Typic Haploxerolls). The treatments were untilled chemical fallow (CF), versus a one-pass undercutter fallow (UF) in 2-yr WW–fallow rotations. (continued)

      Published: June 5, 2015


    • D. B. Jaynes
      Corn Yield and Nitrate Loss in Subsurface Drainage Affected by Timing of Anhydrous Ammonia Application

      Surprisingly little research has examined the corn (Zea mays L.) yield, N-use efficiency (NUE), and water quality implications of N fertilizer timing. Anhydrous ammonia (AA) was applied either in the fall after harvest (F) at 196 kg N ha-1, in the spring before planting (PP), or as an early sidedress (SD) at rates of 168 kg N ha-1 on replicated plots within a producer’s field used to grow corn and soybean [Glycine max (L.) Merr.] in a 2-yr rotation. The field was underlain with subsurface drainage pipes (tiles) which were used to collect drainage and nitrate lost from the root zone for each plot. A fourth treatment was added when the initial fall N application was accidentally over applied by threefold on two plots (FH), allowing us to follow this one time over application over 4 yr. (continued)

      Published: June 5, 2015


    • DongHao Ma, JiaBao Zhang, YunXuan Lu, Laosheng Wu and QuanJiu Wang
      Derivation of the Relationships between Green–Ampt Model Parameters and Soil Hydraulic Properties

      The Green–Ampt model (GAM) is a widely used water infiltration model. However, it lacks a reliable theoretical basis to independently and simultaneously determine the GAM parameters of effective hydraulic conductivity (Ke) and the average matric pressure head at the wetting front (Hf) from those commonly measured soil hydraulic properties. In this paper, we derived an approximate analytical solution similar to GAM for one-dimensional vertical infiltration into soils with initially uniform soil moisture distribution, with Ke and Hf being simultaneously related to the Brooks–Corey (BC) model parameters. The new relationships are not restricted to the piston-type moisture profile or delta-type water diffusivity like in the traditional GAM (TGAM). (continued)

      Published: May 22, 2015

    • Ebrahim Babaeian, Mehdi Homaee, Harry Vereecken, Carsten Montzka, Ali Akbar Norouzi and Martinus Th. van Genuchten
      A Comparative Study of Multiple Approaches for Predicting the Soil–Water Retention Curve: Hyperspectral Information vs. Basic Soil Properties

      Information about the soil–water retention curve is necessary for modeling water flow and solute transport processes in soils. Soil spectroscopy in the visible, near-infrared, and shortwave infrared (Vis-NIR-SWIR) range has been widely used as a rapid, cost-effective and nondestructive technique to predict soil properties. However, less attention has been paid to predict soil hydraulic properties using soil spectral data. In this paper, spectral reflectances of soil samples from the Zanjanrood watershed, Iran, were measured in the Vis-NIR-SWIR ranges (350–2500 nm). (continued)

      Published: May 22, 2015

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