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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/sssaj, which includes the complete archive.

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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

Current issue: Soil Sci. Soc. Am. J. 81(2)


    • Sandra F. Yanni, H. Henry Janzen, Edward G. Gregorich, Ben H. Ellert, Francis J. Larney, Barry M. Olson and Francis Zvomuya
      Erratum: Organic Carbon Convergence in Diverse Soils toward Steady State: A 21-Year Field Bioassay

      Published: May 5, 2017
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    • Matthew R. Levi
      Modified Centroid for Estimating Sand, Silt, and Clay from Soil Texture Class

      Models that require inputs of soil texture are often limited by the availability of soil information. While texture class is easier to obtain than particle size, texture classes do not represent the continuum of soil size fractions. Soil texture class and clay percentage are collected as a standard practice for many land management agencies (e.g., NRCS, BLM, FAO) and clay content is frequently estimated with acceptable accuracy (±5%). When clay and texture class is known, sand and silt can be constrained to a narrow range that may differ from the geometric centroid of a given texture class (gcent). (continued)

      Core Ideas:
      • Knowledge of texture class and clay enables continuous estimates of sand and silt.
      • Rosetta under predicted water retention compared with measured values.
      • Rosetta performance differed by soil texture class.
      • Rosetta estimates were similar for modified centroid and measured particle size.

      Published: May 26, 2017


    • Robert S. Dungan, April B. Leytem, David D. Tarkalson, James A. Ippolito and David L. Bjorneberg
      Greenhouse Gas Emissions from an Irrigated Dairy Forage Rotation as Influenced by Fertilizer and Manure Applications

      Information is needed regarding the effect of N source on greenhouse gas (GHG) emissions from irrigated semiarid agricultural soils. We report N2O, CO2, and CH4 emissions from a silage corn (Zea mays L.) (2013)–barley (Hordeum vulgare L.) (2014)–alfalfa (Medicago sativa L.) (2015) rotation under conventional tillage and sprinkler irrigation. We evaluated the effectiveness of an enhanced-efficiency fertilizer (SuperU, a stabilized granular urea with urease and nitrification inhibitors) to reduce N2O emissions compared with granular urea and to determine GHG emissions from fall-applied dairy manure or composted dairy manure and spring-applied dairy manure. Nitrogen was applied during the first 2 yr of the study. (continued)

      Core Ideas:
      • Urea formulated with urease and nitrification inhibitors can reduce N2O emissions.
      • Nitrous oxide-N emission losses as a percentage of total N applied were ≤0.21%.
      • Timing of manure application did not affect N2O, CO2, and CH4 fluxes.
      • Soil was a CH4 sink and emissions were not influenced by N source.

      Published: May 5, 2017


    • Xin Fu, Jun Wang, Upendra M. Sainju and Wenzhao Liu
      Soil Carbon Fractions in Response to Long-Term Crop Rotations in the Loess Plateau of China

      Diversified crop rotations may enhance C fractions and soil quality by affecting the quality and quantity of crop residue returned to the soil compared with monocropping and fallow. We evaluated the effect of 30-yr-old diversified crop rotations on soil C fractions at 0- to 15-, 15- to 30-, and 0- to 30-cm depths in the Loess Plateau of China. Crop rotations were continuous winter wheat (Triticum aestivum L.) (W); 3-yr rotations of corn (Zea mays L.)–winter wheat–winter wheat–millet (Eleusine coracana L.) (CWWM), pea (Pisum sativum L.)–winter wheat–winter wheat–millet (PWWM), and sainfoin (Onobrychis viciifolia Scop.)–winter wheat–winter wheat–sainfoin (SWWS); 4-yr rotation of pea–winter wheat–winter wheat–corn (PWWC); and 8-yr rotation of alfalfa (Medicago sativa L.) (4 yr)–potato (Solanum tuberosum L.) (1 yr)–winter wheat (3 yr) (A4PoW3). A fallow (F) treatment was also included for comparison. (continued)

      Core Ideas:
      • Long-term (30 yr) diversified crop rotations had a positive impact on soil C fractions.
      • Carbon fractions increased with increased rotation length.
      • Diversified rotations enhanced soil C sequestration and microbial biomass and activity.

      Published: May 18, 2017


    • Simone C. Mello, Yuncong C. Li, Kati W. Migliaccio, Eileen P. Linares, James Colee and Jéssika Angelotti-Mendonça
      Effects of Polymer Coated Urea and Irrigation Rates on Lantana Growth and Nitrogen Leaching

      Lantana (Lantana camara L.) is a popular ornamental plant in seaside communities and an annual plant in hanging baskets. This species cultivated as an annual plant in containers needs to receive fertilizers. The nutrient management in containers can be made using conventional or controlled release fertilizers. The effects of ratios among conventional urea (CU) and polymer-coated urea (PCU), and irrigation water rates applied by evapotranspiration (ET)-based irrigation were studied on dry weight of biomass and N uptake of lantana, N leaching, water-use efficiency (WUE), and N-use efficiency (NUE). (continued)

      Core Ideas:
      • Polymer-coated urea reduced N leaching as compared with conventional urea.
      • Climatic conditions during the lantana growth affected the N uptake and N-use efficiency.
      • These results can be used for water and fertilizer management for ornamental plants.
      • This study can be used to minimize environmental impact caused by N leaching.

      Published: May 11, 2017


    • Lijun Su, Quanjiu Wang, Xinqiang Qin, Yuyang Shan and Xing Wang
      Analytical Solution of a One-Dimensional Horizontal-Absorption Equation Based on the Brooks–Corey Model

      A simple and approximate analytical solution of a one-dimensional horizontal-absorption equation is of great importance for measuring soil hydraulic properties. Several methods for determining the parameters of the Brooks–Corey (BC) model are promising, but all are based on assumptions to some degree. We have developed a new analytical solution for one-dimensional horizontal constant-saturation absorption based on the least-action and variational principles. The profiles of soil–water content (SWC) calculated by the new method were very agreeable with numerical solutions, especially for high water contents. (continued)

      Core Ideas:
      • Least-action and variational principles were used to analyze soil water content distribution.
      • An analytical solution of a one-dimensional horizontal-absorption equation was proposed.
      • A new method to predict the distribution of SWC and estimate the Brooks–Corey model parameters.

      Published: May 5, 2017


    • B.M. Levine, J.R. White, R.D. DeLaune and K. Maiti
      Crude Oil Effects on Redox Status of Salt Marsh Soil in Louisiana

      In 2010, the Deepwater Horizon (DWH) oil spill triggered extensive research on crude oil impacts on flora and fauna of the Gulf of Mexico. Little research has investigated impact of spilled oil on redox condition of wetland soil. Redox condition is an excellent proxy for oxygen levels, which control biogeochemical functions linked to valuable ecosystem services. The goal of this study was to quantify effects of crude oil on wetland soil redox conditions in cores collected from a salt marsh in Barataria Bay, LA. (continued)

      Published: May 11, 2017

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