Journal articles: 'Hydric soils'

1

Hurt, G. W., and V. W. Carlisle. "Using Hydric Soil Indicators in Disturbed Soils." Soil Horizons 38, no. 4 (1997): 101. http://dx.doi.org/10.2136/sh1997.4.0101.

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Berkowitz, Jacob F., and James Barrett Sallee. "Investigating Problematic Hydric Soils using Hydrology, IRIS Tubes, Chemistry, and the Hydric Soils Technical Standard." Soil Science Society of America Journal 75, no. 6 (November 2011): 2379–85. http://dx.doi.org/10.2136/sssaj2011.0040.

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3

Kelley, John A. "Photographing Hydric Soils and Held Indicators." Soil Horizons 50, no. 1 (2009): 17. http://dx.doi.org/10.2136/sh2009.1.0017.

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4

Megonigal, J. P., S. P. Faulkner, and W. H. Patrick. "The Microbial Activity Season in Southeastern Hydric Soils." Soil Science Society of America Journal 60, no. 4 (July 1996): 1263–66. http://dx.doi.org/10.2136/sssaj1996.03615995006000040043x.

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5

Grimley, D. A., and M. J. Vepraskas. "Magnetic Susceptibility for Use in Delineating Hydric Soils." Soil Science Society of America Journal 64, no. 6 (November 2000): 2174–80. http://dx.doi.org/10.2136/sssaj2000.6462174x.

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6

Clausnitzer, David, J. Herbert Huddleston, Edward Horn, Mark Keller, and Curtis Leet. "Hydric Soils in a Southeastern Oregon Vernal Pool." Soil Science Society of America Journal 67, no. 3 (2003): 951. http://dx.doi.org/10.2136/sssaj2003.0951.

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Clausnitzer, David, J. Herbert Huddleston, Edward Horn, Mark Keller, and Curtis Leet. "Hydric Soils in a Southeastern Oregon Vernal Pool." Soil Science Society of America Journal 67, no. 3 (May 2003): 951–60. http://dx.doi.org/10.2136/sssaj2003.9510.

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8

Moorhead, Kevin K. "Diversity of hydric soils in North Carolina, USA." Environmental Management 14, no. 2 (March 1990): 241–47. http://dx.doi.org/10.1007/bf02394041.

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9

Amon, James P., Carolyn S. Jacobson, and Michael L. Shelley. "Construction of fens with and without hydric soils." Ecological Engineering 24, no. 4 (April 2005): 341–57. http://dx.doi.org/10.1016/j.ecoleng.2004.11.011.

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10

Zwanka, W. P., G. W. Hurt, D. A. Graetz, W. D. Graham, and Clark M. W. "Using Magnetic Susceptibility to Delineate Hydric Soils in Southeastern Coastal Plain Soils." Soil Horizons 48, no. 2 (2007): 32. http://dx.doi.org/10.2136/sh2007.2.0032.

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11

Hipple, Karl W. "What's Up with the Test Indicators for Hydric Soils?" Soil Horizons 44, no. 4 (2003): 123. http://dx.doi.org/10.2136/sh2003.4.0123.

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12

Santos, Nielton Gonçalo Nunes dos, Nelci Olszevski, Alessandra Monteiro Salviano, Tony Jarbas Ferreira Cunha, Vanderlise Giongo, and Janielle Souza Pereira. "Granulometric fractions and physical-hydric behavior of sandy soils." Agrarian 12, no. 45 (October 12, 2019): 318–27. http://dx.doi.org/10.30612/agrarian.v12i45.7687.

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13

Vaughan, Karen L., Florence Miller, Nico Navarro, and Christopher Appel. "Visual Assessment of Sulfate Reduction to Identify Hydric Soils." Soil Science Society of America Journal 80, no. 4 (July 2016): 1114–19. http://dx.doi.org/10.2136/sssaj2016.02.0035.

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14

Kotze, D. C., J. R. Klug, J. C. Hughes, and C. M. Breen. "Improved criteria for classifying hydric soils in South Africa." South African Journal of Plant and Soil 13, no. 3 (January 1996): 67–73. http://dx.doi.org/10.1080/02571862.1996.10634378.

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15

Saix, C., and P. Jouanna. "Modélisation thermo-hydro-mécanique d'un sol par méthode mixte." Canadian Geotechnical Journal 26, no. 3 (August 1, 1989): 418–26. http://dx.doi.org/10.1139/t89-055.

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Applications for the thermic exploitation of the subsoil are numerous and diversified. The knowledge of hydric and thermic phenomena may be considered to be satisfactory in many cases, but it is not so when mechanical phenomena are coupled with hydric and thermic phenomena. In order to arrive at the thermo-hydro-mechanical phenomena in unsaturated soils, it is proposed to approach the problem by a "modelling by mixed method." This modelling is based on the iterative use of a mathematical model and a physical local model. The first step of iteration allows access, by means of the mathematical modes, to the evolution of the thermic and hydraulic state variables in the hypothesis of a soil with a solid nondeformable skeleton. The second step of iteration consists in transferring this evolution of the state variables on a sample of soil placed in a "thermic triaxial" and measuring the resulting evolution of the mechanical variables. This "modelling by mixed method" is validated by the study of a silty soil fill used for storing heat in unsaturated soils. Key words: unsaturated soils, thermo-hydro-mechanical, modelling, mixed method, triaxial, consolidation. [Journal translation]

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King, Matthew, Karen L. Vaughan, Karen Clause, and Dan Mattke. "Limitations to Redoximorphic Feature Development in Highly Calcareous Hydric Soils." Soil Science Society of America Journal 83, no. 5 (September 2019): 1585–94. http://dx.doi.org/10.2136/sssaj2019.04.0108.

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17

McKee, William H., and Martha R. McKevlin. "Geochemical processes and nutrient uptake by plants in hydric soils." Environmental Toxicology and Chemistry 12, no. 12 (December 1993): 2197–207. http://dx.doi.org/10.1002/etc.5620121204.

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18

Skorupa, A. L. A., M. Fay, Y. L. Zinn, and M. Scheuber. "Assessing hydric soils in a gallery forest in the Brazilian Cerrado." Soil Use and Management 29, no. 1 (January 24, 2013): 119–29. http://dx.doi.org/10.1111/sum.12023.

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19

Vaughan, Karen L., Jason DeMoss, Taylor Cullum‐Muyres, and Ariel Diaz. "Serpentine parent materials lead to the formation of atypical hydric soils." Soil Science Society of America Journal 84, no. 4 (July 2020): 1342–52. http://dx.doi.org/10.1002/saj2.20090.

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20

Lamontagne, L., C. Camiré, and C. Ansseau. "La végétation forestière du delta de Lanoraie, Québec." Canadian Journal of Botany 69, no. 8 (August 1, 1991): 1839–52. http://dx.doi.org/10.1139/b91-234.

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The vegetation and the soil characteristics of the sandy terraces of the Lanoraie Delta, Quebec, were sampled at 84 forest sites using the methods of Whittaker and Canada Soil Information System. The ordination results show that the soil moisture regime (xeric–hydric) and the pH (3.5–5.0) are the main factors responsible for the spatial distribution of the vegetation. When these results (ordination analysis) and those of the cluster analysis are superimposed, the relationship between the five vegetation groups studied and particular ecological conditions can be seen. Thus, two groups of vegetation dominated by conifers are found in the middle of the terraces. One of these is dominated by Tsuga canadensis and the other by Abies balsamea and Picea rubens. These two groups are found on podzolic, gleyed soils with a mounded microrelief, which are strongly acidic (pH < 3.5) and have a hydric–mesic moisture regime. The remaining three vegetation groups are dominated by deciduous species. Among these, two groups arise from human activities such as logging or farming. One of these is dominated by Fagus grandifolia, Acer saccharum, Acer rubrum, and Quercus rubra and is composed of mature trees. The other is dominated by Pinus strobus, Polulus grandidentata, Populus tremuloides, or Betula papyrifera and is composed of young trees. These two types occupy the edge of the terraces where the topography is flat and the soil podzolic with a moderately to slightly acidic pH (4.0–5.0) and a xeric–mesic moisture regime. Finally the third group, dominated by Acer rubrum, is found on medium acidic (pH = 4.0), gleyed soils with a hydric–mesic moisture regime. This study shows that Acer rubrum is the best suited species for sandy, acidic, and nutrient-poor sites of the Lanoraie Delta. Key words: Lanoraie Delta, multivariate analysis, vegetation classification, Acer rubrum.

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21

Rabot, E., C. Hénault, and I. Cousin. "Temporal Variability of Nitrous Oxide Emissionsby Soils as Affected by Hydric History." Soil Science Society of America Journal 78, no. 2 (February 3, 2014): 434–44. http://dx.doi.org/10.2136/sssaj2013.07.0311.

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22

Galbraith, John M., Patricia F. Donovan, Kelly M. Smith, and Carl E. Zipper. "USING PUBLIC DOMAIN DATA TO AID IN FIELD IDENTIFICATION OF HYDRIC SOILS." Soil Science 168, no. 8 (August 2003): 563–75. http://dx.doi.org/10.1097/01.ss.0000085049.25696.84.

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23

Chikhaoui, Mohamed, Dashnor Hoxha, Naima Belayachi, and Ammar Nechnech. "A Comparative Study of Hydromechanical Properties in Saturated and Partially Saturated Conditions of Two Soils from the Runway of Oran Airport." Advanced Engineering Forum 21 (March 2017): 319–26. http://dx.doi.org/10.4028/www.scientific.net/aef.21.319.

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This study concerns the ground soils of the second runway of the Es-Sénia airport in Oran (Algeria). This airport was built on a very complex hydro geotechnical site when underground cavities, following the dissolution of gypsum soil, were found during the before-construction geologic studies. Several, techniques are used in laboratory (Permeability, triaxial compression tests at various confining pressure, and hydric tests in saturated and unsaturated conditions) and for in situ it’s used the results of SPT and pressure-meter tests. A comparison of parameters of two soils identified in saturated and partially saturated conditions by in situ and laboratory tests was performed in order to respond to questions of the similarity of hydro mechanical properties of two soils as well as their statistical representativeness of the in-situ reality. It is found that, in respect to the studied parameters, laboratory results are statistically significant and reconstituted soils is statistically representative of natural soil reconstitution.

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24

Al Qadad, A., I. Shahrour, and M. Rouainia. "Influence of the soil-atmosphere exchange on the hydric profile induced in soil-structure system." Natural Hazards and Earth System Sciences 12, no. 6 (June 26, 2012): 2039–49. http://dx.doi.org/10.5194/nhess-12-2039-2012.

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Abstract. Soil-atmosphere exchange leads to a moisture change in the soil. This can cause major damage to engineering structures due to the soil expansion and shrinkage. The soil-atmosphere exchange is related to several parameters, in particular the soil characteristics and climate conditions. The presence of an engineering structure causes a variation of the hydraulic profile in the soil, which can lead to heterogeneous soil movement and consequently to structural damage. This paper presents a coupled numerical model based on the consideration of both water flow in unsaturated soils and soil-atmosphere exchange. After the validation of the model, the paper presents its use for the analysis of the influence of the presence of structures on moisture change induced under climatic conditions recorded in a semi-arid region. Analysis shows that the presence of the structure leads to important change in the moisture distribution, in particular in the vicinity of the structure.

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25

Durán, Norberto, and Rubén A. Ortíz. "Efectos de algunas propiedades físicas del suelo y la precipitación sobre la producción de la palma aceitera (Elaeis guineensis) en Centroamérica." Agronomía Mesoamericana 6 (June 2, 2016): 07. http://dx.doi.org/10.15517/am.v6i0.24802.

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The soil aeration and hydric shortage greatly influence oil palm yield in Central America. This assay was conducted to identify and quantify the effect of the physical properties of the soil and rainfall on the yield of oil palm orchards in Coto and Quepos (Costa Rica) and San Alejo (Honduras). The following soil characteristics were evaluated: texture, moisture retention (pF), gravimetric moisture, drain water, total porosity, aerial space, large pore percentage, penetration resistance and tensimeter readings. These evaluations were conducted on 20 fruit bearing plots (in each locality) located within representative soil units; classified as: a) well drained (Fluventic Eutropepts), b) inperfect or moderately drained (Fluvaquentic Eutropepts) and c) poorly drained (Tropaquepts). San Alejo also shows soils with low base saturation (Dystropepts and Psamments). Twenty four additional plots were analyzed in this latter orchard to relate their yield with the catographic units. Regression and corre lation analysis were run for the three localities. The main limiting factors on production were: poor soil aeration en Coto, poor soil aeration and hydric shortage en Quepos, and poor aeration, low base saturation and sandy textures in San Alejo.

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SOWERBY, ALWYN, BRIDGET A. EMMETT, ALBERT TIETEMA, and CLAUS BEIER. "Contrasting effects of repeated summer drought on soil carbon efflux in hydric and mesic heathland soils." Global Change Biology 14, no. 10 (May 27, 2008): 2388–404. http://dx.doi.org/10.1111/j.1365-2486.2008.01643.x.

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27

DeLaune, R. D., and S. R. Pezeshki. "Plant Functions in Wetland and Aquatic Systems: Influence of Intensity and Capacity of Soil Reduction." Scientific World JOURNAL 1 (2001): 636–49. http://dx.doi.org/10.1100/tsw.2001.257.

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Wetland or hydric soils, in addition to excess water and limited air-filled porosity, are characterized by anaerobic or reducing conditions. Wetland plants have developed physiological and morphological adaptations for growing under these conditions. Various methods exist for measuring plant responses to reducing conditions in wetland and aquatic environments, including assessment of radial oxygen transport, cellular enzymatic transformations, changes in root structure, and nutrient uptake. However, a gap exists in quantifying the chemical properties and reducing nature of soil environment in which plant roots are grown. The variation in reducing conditions, oxygen demand, and other associated processes that occur in wetland soils makes it difficult to truly compare the plant responses reported in the literature. This review emphasizes soil-plant interactions in wetlands, drawing attention to the importance of quantifying the intensity and capacity of reduction and/or oxygen demand in wetland soils to allow proper evaluation of wetland plant responses to such conditions.

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Watts, Frank C., and G. Wade Hurt. "Determining Depths to the Seasonal High Water Table and Hydric Soils in Florida." Soil Horizons 32, no. 4 (1991): 117. http://dx.doi.org/10.2136/sh1991.4.0117.

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Mack, Sara C., Martin C. Rabenhorst, and Jacob F. Berkowitz. "Understanding the Inhibition of Color Change in Problematic Red Parent Material Hydric Soils." Soil Science Society of America Journal 83, no. 3 (May 2019): 838–47. http://dx.doi.org/10.2136/sssaj2018.10.0390.

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Moorhead, Kevin K., and Allen E. Cook. "A comparison of hydric soils, wetlands, and land Use in coastal North Carolina." Wetlands 12, no. 2 (September 1992): 99–105. http://dx.doi.org/10.1007/bf03160591.

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31

Brown, Mark J. "Distribution and Characterization of Forested Wetlands in the Carolinas and Virginia." Southern Journal of Applied Forestry 21, no. 2 (May 1, 1997): 64–70. http://dx.doi.org/10.1093/sjaf/21.2.64.

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Abstract Recent forest inventories of North Carolina, South Carolina, and Virginia, included sampling for hydric vegetation, hydric soils, and wetland hydrology. Forest samples that met all 3 of these criteria were classified as forested wetland. This study characterizes wetland forests by extent, owner, age, forest type, physiography, volume, growth, and removals, and evaluates its contribution to the timber supply. Wetland stands comprise 8.1 million ac, or 17% of the forests in the 3 States. They are over 90% privately owned, they vary widely by type and physiography, and they contribute 21% of all removals. Classification of wetland area based simply on broad management class and physiography will result in inaccurate estimates. South. J. Appl. For. 21(2):64-70.

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Duarte, Thiago F., Edna M. Bonfim-Silva, Tonny J. A. da Silva, Márcio Koetz, and Gabrielly F. Lima. "Physical-hydric properties of Oxisol and Quartzipsamment associated with the application of wood ash." Revista Brasileira de Engenharia Agrícola e Ambiental 27, no. 3 (March 2023): 188–94. http://dx.doi.org/10.1590/1807-1929/agriambi.v27n3p188-194.

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ABSTRACT The addition of wood ash to soil is an alternative to disposing of this residue. However, the effects of wood ash on soil physical-hydric properties remain divergent. In this study, the effects of added wood ash on the soil water characteristic curve, gravitational water, field capacity, total available water, and saturated hydraulic conductivity were evaluated in Oxisol (40% clay and clay texture) and Quartzipsamment (6% clay and sand texture). The experimental design was completely randomized in a 2 × 4 factorial scheme, where the factors were two soils and four doses of wood ash, with three replicates. The wood ash came from an agribusiness and was the result of burning eucalyptus wood. The wood ash doses were 0, 16, 32, and 64 g dm-3. The gravitational water, field capacity, and total available water were fitted to a quadratic model as a function of the wood ash dose. The saturated hydraulic conductivity decreased linearly with an increase in wood ash dose for both soil classes. The soil water characteristic curve only increased significantly (p ≤ 0.05) with a wood ash dose of 64 g dm-3. The increase in total available water was more evident in Oxisol than that in Quartzipsamment, with increments of 64 and 31%, respectively, at a maximum dose of 64 g dm-3 of wood ash.

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Ghembaza, Moulay-Smaïne, Said Taïbi, and Jean-Marie Fleureau. "Effet de la température sur le comportement des sols non saturés sur les chemins de drainage et d’humidification." Canadian Geotechnical Journal 44, no. 9 (September 2007): 1064–81. http://dx.doi.org/10.1139/t07-079.

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The behaviour of soils subject to suction on drying and wetting paths depends on the type of material and its initial state. Exposure to heat modifies the state of pore water and therefore the hydromechanical behaviour of the soil. A new experimental device has been developed to study the thermohydric behaviour of unsaturated soils. Salt solution desiccators and polyethylene glycol (PEG) osmotic solutions are dipped in thermostatic baths, whose temperature ranges from room temperature to 80 °C. Tests were carried out on a sandy clay prepared in the laboratory and on a natural undisturbed clay, extracted from an experimental site for deep underground storage of radioactive waste. Results show that temperature plays an important role in the shrinkage of soil, especially when subjected to high levels of suction. The results can be applied to observe the response of confining clay barriers submitted to hydric and thermal changes.

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Wurzburger, Nina, and Caroline S. Bledsoe. "Comparison of ericoid and ectomycorrhizal colonization and ectomycorrhizal morphotypes in mixed conifer and pygmy forests on the northern California coast." Canadian Journal of Botany 79, no. 10 (October 1, 2001): 1202–10. http://dx.doi.org/10.1139/b01-078.

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On the northern California coast, mixed conifer forests occur on younger, relatively fertile terraces, whereas mesic and hydric pygmy forests occur on older, infertile, poorly drained terraces. We characterized mycorrhizal associations, ectomycorrhizal morphotypes, and colonization levels for nine plant species from three plant communities (mixed conifer, mesic pygmy, and hydric pygmy). Pinus contorta ssp. bolanderi (Parl.) Critchf. and Pinus muricata D. Don were ectomycorrhizal; all ericaceous plants formed ericoid mycorrhizas except Arctostaphylos nummularia A. Gray, which formed only arbutoid mycorrhizas. Arbuscular mycorrhizas were not observed, even on Cupressus goveniana ssp. pigmaea (Lemmon) J. Bartel. Ectomycorrhizal colonization was significantly lower in pygmy forests, while ericoid mycorrhizal colonization was significantly higher, as compared with the mixed conifer forest. Ectomycorrhizal and ericoid mycorrhizal colonization was greater on hummocks than in swales at hydric pygmy sites. Thirteen distinct ectomycorrhizal and arbutoid mycorrhizal morphotypes were observed: eight only on Pinus spp. and two only on A. nummularia. Two morphotypes were found only in mixed conifer, and eight were found only in pygmy communities. Distribution of morphotypes may reveal habitat and (or) host adaptation by ectomycorrhizal fungi.Key words: ectomycorrhizal morphotypes, ericoid mycorrhizas, pygmy forest, Ericaceae, mycorrhizal colonization, low-fertility soils.

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Pochet, G., M. Van der Velde, M. Vanclooster, and B. Delvaux. "Hydric properties of high charge, halloysitic clay soils from the tropical South Pacific region." Geoderma 138, no. 1-2 (February 2007): 96–109. http://dx.doi.org/10.1016/j.geoderma.2006.10.019.

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Pospíšilová, Ľ., and N. Fasurová. "Spectroscopic characteristics of humic acids originated in soils and lignite." Soil and Water Research 4, No. 4 (December 7, 2009): 168–75. http://dx.doi.org/10.17221/14/2009-swr.

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The aim of our work was to characterise the stability, humification degree, and principal classes of fluorophores in humic acids isolated from different matrices. Soil humic acids were isolated from arable soils and grassland that differ in the texture and moisture regimes (e.g. aquic; udic; and ustic moisture regimes). Basic soil characteristics, such as total organic carbon content, humus fractionation, cation exchange capacity, soil reaction, texture, and optical indexes were determined. The international standard method for humic acids (HA) isolation was used. Lignite represents a valuable organic substrate, with mineral inclusion situated on the transformation route from phytomass to a dehydrated, dehydrogenated, and deoxidised carbon type complex and water. One of the most attractive ways of non-energetic exploitation of lignite is humic substances source exploitation. It is known that humic acids isolated from lignite show typical bands known from other HA soil samples due to aromatic and various C-O structures. Spectroscopic characterisation has been a topic of great interest, chemical species being analysed with respect to the overall spectral characteristics of the system. Therefore UV-VIS, FTIR, and synchronous fluorescence spectroscopy (SFS) were applied in our study. The elemental composition and ash content in HA samples were determined. HA preparations were more hydrated in hydromorphic soils (Fluvi-Eutric Gleysol and Gleyic Stagnosol). The highest carbon content was found in lignite HA (57.5 weight %). Generally, carbon content was decreasing in the following order: Lignite HA > Haplic Chernozem HA > Fluvi-Eutric Gleysol HA > Haplic Luvisol HA > Gleyic Stagnosol HA > Eutric Cambisol HA. FTIR spectroscopy showed that the aromatic indexes varied from 0.61 to 0.73. HA were divided into two groups according to the aromatic and aliphatic compounds in their molecules. The highest aromatic degree and stability was found in lignite HA and Haplic Chernozem HA. Humic acids isolated from grassland and hydric soils contained more aliphatic and newly formed compounds. Synchronous fluorescence scan spectra identified aliphatic compounds in grassy and hydric soils at lower wave lengths. At higher wave lengths, identical fluorophores were detected. We registered five main peaks at: 467/487, 481/501, 492/512, 450/470, 339/359 (at Δλ = 20 nm). The peaks positions corresponded to the fluorescence behaviour of Elliot soil HA standard. Only lignite HA revealed another fluorescence peak at 492/512 nm. The peaks positions complied with the fluorescence behaviour of Leonardite standard HA. The relationships between the fluorescence indexes, colour indexes, aromatic indexes, humification degree, and elemental composition were evaluated by correlation analysis.

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Hachimi, Dahhaoui, Belayachi Naima, and Zadjaoui Abdeldjalil. "Study of primary creep behavior of clayey soils in landslide area : suction effect." MATEC Web of Conferences 149 (2018): 02027. http://dx.doi.org/10.1051/matecconf/201814902027.

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Creep behavior of clayey soils plays an extremely important role in the landslide process. The soils that make up these sliding zones are often in unsaturated state. This point indicates the need to take into account the suction effect as hydric parameter on the long-term deformation of clayey soils. In this paper, a primary creep model named Modified Time Hardening (MTH) for unsaturated soils with different matric suction has been built. Based on the literature tests results[1][2], parameters C1 and C2 of the model have relations with suction and deviator stress level respectively. The primary creep strainwill be able to demonstrate unsaturated effect of the soils. comparison between the calculated results and the literature tests results shows a good coherence. The work underway at the university of Orleans will show later the relevance of model used in the present work.

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Brito, Jorge Luís Silva. "OS SOLOS DA BACIA DO RIBEIRÃO BOM JARDIM E SUAS RELAÇÕES COM RELEVO E OS RECURSOS HÍDRICOS, UBERLÂNDIA (MG)." Caminhos de Geografia 3, no. 7 (October 28, 2002): 20–40. http://dx.doi.org/10.14393/rcg3715298.

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The present work describes the methodology used to map the soils in the Basin of the Bom Jardim Creek (in the scale of 1:50,000) as well as the relations among the soils, relief and the hydric resources. The Bom Jardim creek is the main affluent to the Uberabinha river on its left margin. It drains an area of 396.54 km2 of lands located in the municipalities of both Uberaba and Uberlândia. The soils in the basin of the Bom Jardim creek are latosoils in the most, with medium texture, dystrophic, with low levels of organic substances. Around 20% of the basin have soils affected by hydromorphism (Neosoils, Gleisoils and Organosoils). These are found in the lane and meadow areas where the resurgence of the water table occurs. Such soils play a vital role in the hydrologic balance of the courses in the basin of the Bom Jardim creek.

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Yoka Khail, Bilal, Mathilde Morvan, and Pierre Breul. "Behavior of unsaturated pelitic soil in a railway context." E3S Web of Conferences 195 (2020): 01010. http://dx.doi.org/10.1051/e3sconf/202019501010.

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As part of the rehabilitation work on the Gabonese railway line, the Trans-Gabon Railway, it was necessary to analyse the behaviour of the materials constituting the subgrade soil. These soils are pelitic soils whose behaviour under unsaturated conditions and cyclic loading has not been studied before and which present differential settlements and lack of bearing capacity. In this article, we focus on the characterization of the subgrade soil. The objective of this work is first to determine the in-situ characteristics of the pelitic soil and be able to link these characteristics with the behaviour studied in laboratory. For that purpose, we propose an in-situ investigation based on the use of light dynamic penetrometric tests in order to assess the variability of the subgrade layer and a drying-wetting test to assess the influence of hydric stress on the drainage path of the studied soil. We present the results of in-situ tests performed on a study area. We also present the results of the tests to determine the soil water characteristic curves (SWCC) and the curves describing the volumetric behaviour of this soil when exposed to drying.

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Kelsey, P. D., and R. G. Hootman. "Relationships between Water Tables, Plant Communities, and Hydric Soils: West Chicago Prairie, West Chicago, Illinois." Soil Horizons 33, no. 3 (1992): 53. http://dx.doi.org/10.2136/sh1992.3.0053.

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41

Machung, Laurie, and Robert G. Darmody. "A Field Key for the Classification of Hydric Soils to the Series Level in Illinois." Soil Horizons 39, no. 4 (1998): 109. http://dx.doi.org/10.2136/sh1998.4.0109.

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Salinas-Zavala, Federico, Enrique Troyo-Diéguez, and Miguel A. Porta-Gándara. "GROWTH, WATER DEMAND, AND YIELD OF CHERRY TOMATOES UNDER DIFFERENT WATER QUALITY IRRIGATIONS." HortScience 27, no. 6 (June 1992): 681g—682. http://dx.doi.org/10.21273/hortsci.27.6.681g.

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Cherry tomatoes growth, water demand and yield were measured under different water quality conditions in order to assess their performance in arid and saline soils. Treatments were: i) desalted seawater and humid conditions, ii) fresh water and dry conditions, and iii) saline water and humid conditions. No fertilizers were added. Differences highly significant were found in all treatments. The highest yield (6 Kg/plant) was observed in the plots irrigated with desalted seawater, and the lowest (0.4 Kg/plant) in the plots irrigated with saline water. Water demand and some hydric parameters were higher in the salt affected soils. Fruit size was similar in all trealments. The results suggest that the establishment of cherry tomatoes in saline non-productive soils is feasible, as an alternative to other varieties.

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Costanzo, J. P., J. D. Litzgus, J. B. Iverson, and R. E. Lee. "Soil hydric characteristics and environmental ice nuclei influence supercooling capacity of hatchling painted turtles Chrysemys picta." Journal of Experimental Biology 201, no. 22 (November 1, 1998): 3105–12. http://dx.doi.org/10.1242/jeb.201.22.3105.

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Hatchling painted turtles (Chrysemys picta) hibernate in their shallow natal nests where temperatures occasionally fall below -10 C during cold winters. Because the thermal limit of freeze tolerance in this species is approximately -4 C, hatchlings rely on supercooling to survive exposure to extreme cold. We investigated the influence of environmental ice nuclei on susceptibility to inoculative freezing in hatchling C. picta indigenous to the Sandhills of west-central Nebraska. In the absence of external ice nuclei, hatchlings cooled to -14.6 1.9 C (mean s.e.m.; N=5) before spontaneously freezing. Supercooling capacity varied markedly among turtles cooled in physical contact with sandy soil collected from nesting locales or samples of the native soil to which water-binding agents (clay or peat) had been added, despite the fact that all substrata contained the same amount of moisture (7.5 % moisture, w/w). The temperature of crystallization (Tc) of turtles exposed to frozen native soil was -1.6 0.4 C (N=5), whereas turtles exposed to frozen soil/clay and soil/peat mixtures supercooled extensively (mean Tc values approximately -13 C). Hatchlings cooled in contact with drier (less than or equal to 4 % moisture) native soil also supercooled extensively. Thus, inoculative freezing is promoted by exposure to sandy soils containing abundant moisture and little clay or organic matter. Soil collected at turtle nesting locales in mid and late winter contained variable amounts of moisture (4-15 % w/w) and organic matter (1-3 % w/w). In addition to ice, the soil at turtle nesting locales may harbor inorganic and organic ice nuclei that may also seed the freezing of hatchlings. Bulk samples of native soil, which were autoclaved to destroy any organic nuclei, nucleated aqueous solutions at approximately -7 C (Tc range -6.1 to -8.2 C). Non-autoclaved samples contained water-extractable, presumably organic, ice nuclei (Tc range -4.4 to -5.3 C). Ice nuclei of both classes varied in potency among turtle nesting locales. Interaction with ice nuclei in the winter microenvironment determines whether hatchling C. picta remain supercooled or freeze and may ultimately account for differential mortality in nests at a given locale and for variation in winter survival rates among populations.

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LAMONTAGNE, L., and C. CAMIRE. "SOIL ANALYSIS AND NUMERICAL CLASSIFICATION OF THE LANORAIE DELTA, QUEBEC." Canadian Journal of Soil Science 67, no. 3 (August 1, 1987): 417–32. http://dx.doi.org/10.4141/cjss87-041.

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Analysis and numerical classification of Lanoraie Delta soils were performed as part of an ecological study. After stratification, using detailed soil maps, 84 forest sites were randomly sampled. Eighteen soil descriptors, mainly morphologic, were retained for numerical analysis. Gower's similarity coefficient between profiles was used for the principal coordinate analysis (PCA) which brought out the most probable factors governing soil distribution. The first two axes of the PCA represented 15.5 and 6.2% of the total variance. Soil distribution was along two gradients: soil water regime (Xeric-Hydric) and genetic development (Gleysolic-Podzolic). Cluster analysis by complete linkage created five soil groups which were composed of 23, 9, 17, 25 and 10 soil individuals, respectively. The interpretation of these soil groups utilized the superposition of clusters onto the first two axes of the PCA. Each group was classified into a taxonomic subgroup (Canadian System of Soil Classification) and defined by a typical humus form. Key words: Lanoraie Delta, multivariate analysis, soil classification

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Schladweiler, Brenda K., Scott Rexroat, and Scott Benson. "HYDRIC SOILS AND THE RELATIONSHIP TO PLANT DIVERSITY WITHIN RECLAIMED STREAM CHANNELS IN SEMI-ARID ENVIRONMENTS." Journal American Society of Mining and Reclamation 1999, no. 1 (1999): 579–83. http://dx.doi.org/10.21000/jasmr99010579.

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Stevens, V. C., J. T. Ammons, J. L. Branson, T. E. Cook, and D. J. Inman. "CHEMICAL AND PHYSICAL CHARACTERISTICS OF ANTHROPOGENIC HYDRIC SOILS ON MINE TAILINGS IN THE COPPER BASIN, TENNESSEE." Journal American Society of Mining and Reclamation 2000, no. 1 (2000): 537–45. http://dx.doi.org/10.21000/jasmr00010537.

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Ciupureanu, Gabriela Mihaela, Elena Ciuciuc, Aurelia Diaconu, Alina Ciuca, and Daniela Popa. "Climate Change’s Impact on Sandy Soils and on the Grafted Watermelons Adaptation." “Agriculture for Life, Life for Agriculture” Conference Proceedings 1, no. 1 (July 1, 2018): 358–66. http://dx.doi.org/10.2478/alife-2018-0053.

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Abstract Starting from the fact that the principles of agro-ecology become fundamental principles for the development of a green economy, especially in the context of current climate change, the effective capitalization of the ecological conditions of an agricultural area is one of the main objectives of agricultural science and practice. Identifying and formulating adaptive technological solutions can guide any producer to capitalize different climate and soil conditions. The sandy soils in Southern Oltenia offer less favourable ecological conditions, and the cultivation of watermelons is now profitable enough for such conditions. Growers are, however, interested in getting the most productive yields, early and profitable, even under the conditions of climate change. The current paper quantifies the grafting of watermelons in the conditions of the sandy soils of Dăbuleni, with poor soil supply, with meteorological drought phenomena and agricultural drought risk, in terms of quality and quantity of production under the climatic conditions in 2015-2017. The results, correlated with the climatic conditions, recommend the cultivation of grafted watermelons, offering the producers in the area a niche of ecological adaptation, ensuring the resistance of plants to abiotic, thermo-hydric stress factors, and improving the resistance to low temperatures, heat and drought.

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SOARE, Marin, Paula IANCU, Elena BONCIU, Ion NICOLAE, Luminita BUSE DRAGOMIR, and Ovidiu Florin PANITA. "Evaluation of the Behavior of Some Genotypes of Salix sp. in the Conditions of Sandy Soils." Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture 75, no. 1 (May 18, 2018): 44. http://dx.doi.org/10.15835/buasvmcn-agr:003017.

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The aim of this study was to make a comparative analyse of nine willow genotypes (seven Romanian and two Swedish clones) in order to test them for short rotation coppice. Researches have been carried out in the sandy soils from Southern Romania, over a period of two years of vegetation. There were made determinations as concern plants growth and development and were referring to survival rate, stem height, number of shoots/plant and stem diameter at the base. Hydric stress is one of the main factors of limiting plant growth on this type of soil and the experimented willow genotypes have reacted differently. The obtained results have shown the fact that the largest vegetative growth was recorded in Pesred and Inger genotypes. It also emphasizes with good results in terms of the quantity of biomass RO 1077, Fragisal and Robisal genotypes. Based on the obtained results it can appreciate that Salix sp. represents a solution of utilize the sandy soils which have low fertile and obtaining considerable amounts of biomass, in the conditions of ensuring of water and nutritive resources.

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Marcatto, Francieli Sant'ana, and Hélio Silveira. "Relação entre as propriedades físicas e hídricas e os tipos de uso da terra em Neossolos Regolíticos da bacia hidrográfica do rio Pirapó-PR / Relation between the physical and hydric properties and the types of use of land in Regolithic Neosols (...)." Caderno de Geografia 27, no. 50 (August 3, 2017): 427. http://dx.doi.org/10.5752/p.2318-2962.2017v27n50p427.

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Os Neossolos Regolíticos da bacia hidrográfica do Pirapó-PR são utilizados, principalmente, para o cultivo de pastagem e culturas de grãos e apresentam baixo potencial de uso e elevada suscetibilidade à erosão, devido a sua pequena profundidade, grande pedregosidade e a ocorrência em áreas de relevo dissecado. Diante disso, esse trabalho objetiva estudar os Neossolos Regolíticos do compartimento de paisagem 4a da bacia hidrográfica do Pirapó e os efeitos das diferentes formas de uso e ocupação no comportamento físico e hídrico do solo. Foram analisados os horizontes superficiais desses solos, cultivados com pastagem, culturas de grãos e floresta nativa. Foram realizadas análises físicas de densidade do solo, porosidade total, macroporosidade, microporosidade, granulometria, resistência à penetração, umidade e estabilidade de agregados; análises hídricas de velocidade de infiltração e condutividade hidráulica e a análise química de carbono orgânico. Os resultados indicaram que o Neossolo Regolítico cultivado com pastagem e cultura de grãos mostrou-se sensível às alterações impostas pelo tipo de uso, com modificações em suas propriedades físico-hídricas.Palavras-chave: Neossolo Regolítico; propriedades físico-hídricas; uso da terra; bacia hidrográfica do Pirapó-PR.AbstractThe Regolithic Neosols of the basin of Pirapó-PR are used mainly for pasture and grain crops and they have low potential for use and they have high susceptibility to erosion, so due to its small depth, they have great stoniness and the occurrence in areas of relief dissected. Therefore, this work aims to study the Regolithic Neosols of landscape compartment 4a of the basin of Pirapó and the effects of different forms of use and occupation in the physical and hydric behavior of the soil. The surface horizons of these soils were analyzed, grown with pasture, grain crops and native forest. Were realized physical analysis of density of soil, total porosity, macroporosity, microporosity, granulometry, resistance of penetration, moisture and aggregate stability; hydric analysis of infiltration rate and hydraulic conductivity and the chemical analysis of organic carbon. The results indicated that the Regolithic Neosols cultivated with pasture and crop grain was sensitive to changes imposed by the type of use, with changes in their physical and hydric properties.Keywords: Regolithic Neosols; physical and hydric properties; land use; basin of Pirapó-PR.

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Nordt, L. C., and S. G. Driese. "Hydropedological assessment of a vertisol climosequence on the Gulf Coast Prairie Land Resource Area of Texas." Hydrology and Earth System Sciences Discussions 6, no. 2 (April 30, 2009): 3637–68. http://dx.doi.org/10.5194/hessd-6-3637-2009.

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Abstract. Vertisols contain slickensides and wedge-shaped aggregates formed by shrink-swell processes during wet-dry cycles in seasonal climates. The dynamic distribution of macro- and microvoids as a by-product of this unique process, accompanied by microtopographic lows and highs, mitigate our ability to make accurate and precise interpretations of aquic and hydric conditions in these problematic soils. We studied Vertisols across a subhumid to humid climosequence to assess the formation of redoximorphic features on planar landscape positions in response to varying levels of rainfall. Approximately 1000 mm of MAP is required to form soft iron masses that then increase in abundance, and to shallower depths, with increasing rainfall. More than 1200 mm of MAP is needed to form iron pore linings, regardless of microlow or microhigh topographic position. Soft iron masses with diffuse boundaries become more abundant with higher rainfall in microlows, whereas masses with nondiffuse boundaries are more common in microhighs. Iron depletions do not correlate with rainfall in terms of abundance or depth of occurrence. Most soft iron masses form in oxygenated ped interiors as water tends to first saturate and reduce voids where iron depletions form. The quantity of crayfish burrows is strongly correlated with rainfall and first appears coincidentally with soft iron masses in microlows near 1000 mm of MAP. Dithionite-citrate extractable and ammonium-oxalate extractable iron oxides increase systematically with rainfall indicating frequent episodes of iron reduction and precipitation into pedogenic forms. It appears that Vertisols forming in these landscapes with MAP greater than 1200 mm should classify as Aquerts because of the presence of aquic conditions. These same soils may also meet the definition of hydric as one criterion for the identification of Federally protected wetlands. However, there is a considerable disjunct between protracted periods of saturation and limited periods of reduction in these soils. Non-Darcian bypass flow appears to be the principle mechanism governing the flux of water through these cracking soils where water first accumulates and then persists in microlow bowls.

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Journal articles on the topic 'Hydric soils'

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