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1. Laboratory spiking process of soil with various uranium and other heavy metals

Author:
Chen, Liangmei; Larson, Steven L.; Ballard, John H.; Ma, Youhua; Zhang, Qinku; Li, Jiangxia; Wu, Linchun; Arslan, Zikri; Han, Fengxiang X.
Source:
MethodsX 2019 v.6 pp. 734-739
ISSN:
2215-0161
Subject:
soil heterogeneity,   etc   ; adsorption; grinding; heavy metals; particulates; safety equipment; uranium;     Show all 7 Subjects
Abstract:
... Laboratory studies using metal spiked soils are challenging due to soil heterogeneity. This work provides an easy, quick, precise, and accurate technique for the preparation of spiked soils for laboratory research. The process described spiking soil with various uranium species and other heavy metals for laboratory scale pilot experiments under various biogeochemical conditions. The procedure invo ...
DOI:
10.1016/j.mex.2019.03.026

2. Unimodal relationship between three-dimensional soil heterogeneity and plant species diversity in experimental mesocosms

Author:
Liu, Yongjie; De Boeck, Hans J.; Li, Zhenqing; Nijs, Ivan
Source:
Plant and soil 2019 v.436 no.1-2 pp. 397-411
ISSN:
0032-079X
Subject:
soil heterogeneity,   etc   ; models; niches; nitrogen; plant communities; plant density; species diversity;     Show all 7 Subjects
Abstract:
... AIMS: Soil heterogeneity is a primary mechanism explaining plant species diversity. Yet, controlled experiments yield inconsistent soil heterogeneity-diversity (SHD) relationships, ranging from positive, neutral to negative. METHODS: Here we investigated the SHD relationship by experimentally alternating nutrient-rich and nutrient-poor substrate in three dimensions, creating four levels of soil co ...
DOI:
10.1007/s11104-019-03938-w

3. Quantitative relationships between soil landscape index and classification grain

Author:
Pan, Yue; Lu, Xiaosong; Yu, Dongsheng; Huang, Jingjing; Sun, Xin; Xu, Zhichao
Source:
Journal of soils and sediments 2019 v.19 no.2 pp. 903-916
ISSN:
1439-0108
Subject:
soil heterogeneity,   etc   ; computer software; land use; landscapes; soil classification; spatial variation;     Show all 6 Subjects
Abstract:
... PURPOSE: Understanding space grain impact on soil landscape patterns is helpful to discover specific spatial heterogeneity of soil landscape. The objectives of this study were to reveal the effect of soil classification grain on soil landscape indices and establish a quantitative characterization function between soil landscape index and soil classification grain then we can reveal the sensitivity ...
DOI:
10.1007/s11368-018-2093-1

4. Influence of soil variability on single and competitive interaction of ammonium and potassium: experimental study on seven different soils

Author:
Buragohain, Poly; Sreedeep, S.; Lin, Peng; Ni, Junjun; Garg, Ankit
Source:
Journal of soils and sediments 2019 v.19 no.1 pp. 186-197
ISSN:
1439-0108
Subject:
soil heterogeneity,   etc   ; adsorption; ammonium; cation exchange capacity; nutrients; potassium; prediction; surface area; wastelands; wastes;     Show all 10 Subjects
Abstract:
... PURPOSE: Ammonium and potassium are nutrients that generally co-exist together in soils in municipal wasteland. The main objective of this study is to investigate the interactive effects of NH₄⁺ and K⁺ on their sorption characteristics in seven different soils. MATERIALS AND METHODS: The adsorption parameters (Freundlich partition coefficient KF and maximum contaminant adsorbed by solid Qₘ) of bot ...
DOI:
10.1007/s11368-018-2004-5

5. Intraspecific aggregation and soil heterogeneity: competitive interactions of two clonal plants with contrasting spatial architecture

Author:
Xue, Wei; Huang, Lin; Yu, Fei-Hai; Bezemer, T. Martijn
Source:
Plant and soil 2018 v.425 no.1-2 pp. 231-240
ISSN:
0032-079X
Subject:
soil heterogeneity,   etc   ; Bolboschoenus; Carex; biomass; clones; competitive exclusion; soil nutrients;     Show all 7 Subjects
Abstract:
... BACKGROUND AND AIMS: Intraspecific aggregation of plant individuals can promote species coexistence by delaying competitive exclusions. However, such impacts may differ among species with contrasting spatial architecture and rely on the spatial distribution of resources. METHODS: We grew a phalanx clonal plant Carex neurocarpa (with aggregated ramets) and a guerilla one Bolboschoenus planiculmis ( ...
DOI:
10.1007/s11104-018-3578-9

6. Partition of Cd, Cu, Pb and Zn among mineral particles during their sorption in soils

Author:
Sipos, Péter; Tóth, Adrienn; Kis, Viktória Kovács; Balázs, Réka; Kovács, Ivett; Németh, Tibor
Source:
Journal of soils and sediments 2019 v.19 no.4 pp. 1775-1787
ISSN:
1439-0108
Subject:
soil heterogeneity,   etc   ; cadmium; clay minerals; coatings; copper; iron; iron oxyhydroxides; lead; pH; soil minerals; sorbents; sorption; transmission electron microscopy; zinc;     Show all 14 Subjects
Abstract:
... PURPOSE: Heterogeneity of soil mineral particles may lead to the misinterpretation of bulk sorption data on their role in metal sorption, which may be resolved through the direct observation of metal distribution among the soil particles after the sorption. MATERIALS AND METHODS: Analytical transmission electron microscopy was used to study metal (Cd, Cu, Pb, Zn) sorption characteristics of clay m ...
DOI:
10.1007/s11368-018-2184-z

7. Natural Stimuli Calibration with Fining Direction Regularization in an Integrated Hydrologic Model

Author:
Berg, Steven J.; Grosso, Nancy R.; Sherrier, Michael P.; Mudrick, Kevin; Ohr, Matthias; Hwang, Hyoun‐Tae; Park, Young‐Jin; Callaghan, Michael V.; Frey, Steven K.; Sudicky, Edward A.
Source:
Ground water 2019 v.57 no.1 pp. 21-35
ISSN:
0017-467X
Subject:
soil heterogeneity,   etc   ; computer software; geometry; groundwater; hydraulic conductivity; hydrologic models; mathematical models; riparian areas; rivers; surface water; Virginia;     Show all 11 Subjects
Abstract:
... The interaction between surface water and groundwater during flood events is a complex process that has traditionally been described using simplified analytical solutions, or abstracted numerical models. To make the problem tractable, it is common to idealize the flood event, simplify river channel geometry, and ignore bank soil heterogeneity, often resulting in a model that only loosely represent ...
DOI:
10.1111/gwat.12842

8. Evaluation of connected clonal growth of Solidago chilensis as an avoidance mechanism in copper-polluted soils

Author:
Lillo, Felipe; Ginocchio, Rosanna; Ulriksen, Christopher; Dovletyarova, Elvira A.; Neaman, Alexander
Source:
Chemosphere 2019 v.230 pp. 303-307
ISSN:
0045-6535
Subject:
soil heterogeneity,   etc   ; Solidago chilensis; clones; copper; herbaceous plants; hinterland; laboratory experimentation; metal tolerance; microhabitats; organic matter; phytotoxicity; polluted soils; pollution; rhizomes; shrubs; soil profiles; soil quality;     Show all 17 Subjects
Abstract:
... Plant resistance to metals can be achieved by two strategies, tolerance and avoidance. Although metal tolerance has been broadly studied in terrestrial plants, avoidance has been less considered as a strategy to cope with soil metal pollution. Avoidance may be an effective alternative in herbaceous plants with connected clonal growth in environments having high heterogeneity in soil micro-spatial ...
DOI:
10.1016/j.chemosphere.2019.04.199

9. Pedology and soil class mapping from proximal and remote sensed data

Author:
Poppiel, Raúl R.; Lacerda, Marilusa P.C.; Demattê, José A.M.; Oliveira, Manuel P.; Gallo, Bruna C.; Safanelli, José L.
Source:
Geoderma 2019 v.348 pp. 189-206
ISSN:
0016-7061
Subject:
soil heterogeneity,   etc   ; Landsat; color; kaolinite; normal distribution; quartz; reflectance; remote sensing; sesquioxides; soil mineralogy; soil sampling; soil surveys; texture; time series analysis; toposequences; topsoil; Brazil;     Show all 17 Subjects
Abstract:
... Pedological assessment and mapping by hyperspectral proximal and multispectral remote sensing comes up as an important alternative for large extent areas with high soil variability. Strategies indicating how to integrate these multi-source data for digital soil mapping are emerging. In this paper, we used proximal and remote sensed data to perform pedological assessments and to support a detailed ...
DOI:
10.1016/j.geoderma.2019.04.028

10. Field-scale distribution and heterogeneity of soil salinity in the mulched-drip-irrigation cotton field

Author:
Xing, Xuguang; Du, Wei; Ma, Xiaoyi
Source:
Archiv für Acker- und Pflanzenbau und Bodenkunde 2019 v.65 no.9 pp. 1248-1261
ISSN:
1476-3567
Subject:
soil heterogeneity,   etc   ; arid zones; cotton; cropland; irrigation; salinity; salts; soil profiles; soil salinity; soil salts; solar radiation; spatial variation; standard deviation; temporal variation;     Show all 14 Subjects
Abstract:
... Salts widely distribute in cropland in extreme arid region and characterizing its distribution and spatiotemporal variability would provide both agronomic and environmental information. We investigated the spatial variation and temporal stability of soil salinity (0–40 cm) in field-scale mulched-drip-irrigation cotton field. Spatial behavior showed the salinity for 0–20 cm changed with more fluctu ...
DOI:
10.1080/03650340.2018.1562273

11. A numerical analysis of aggregation error in evapotranspiration estimates due to heterogeneity of soil moisture and leaf area index

Author:
Chen, Qiting; Jia, Li; Menenti, Massimo; Hutjes, Ronald; Hu, Guangcheng; Zheng, Chaolei; Wang, Kun
Source:
Agricultural and forest meteorology 2019 v.269-270 pp. 335-350
ISSN:
0168-1923
Subject:
soil heterogeneity,   etc   ; energy conservation; evapotranspiration; land cover; leaf area index; meteorological parameters; models; probability distribution; semiarid zones; soil water; tiles; water shortages;     Show all 12 Subjects
Abstract:
... Land Surface Models which determine evapotranspiration (ET) by neglecting the sub-grid heterogeneity of land-atmosphere parameters will cause aggregation biases in spatially-averaged ET estimates, considering the nonlinear dependences of ET on the heterogeneous land-atmosphere parameters. One frequently adopted strategy clusters the heterogeneous surface within a model grid into several tiles, ass ...
DOI:
10.1016/j.agrformet.2019.02.017

12. Fine scale heterogeneity of soil properties causes seedling spatial niche separation in a tropical rainforest

Author:
Xia, Shang-Wen; Cao, Min; Yang, Xiaodong; Chen, Jin; Goodale, Uromi Manage
Source:
Plant and soil 2019 v.438 no.1-2 pp. 435-445
ISSN:
0032-079X
Subject:
soil heterogeneity,   etc   ; ammonium; biodiversity; canopy; ecological differentiation; nitrates; phosphorus; potassium; seed dispersal; seedling growth; seedlings; soil pH; spatial variation; surveys; total nitrogen; tropical rain forests; China;     Show all 17 Subjects
Abstract:
... AIMS: In tropical rainforests, seedling performance at fine ecological scales has traditionally been explained by seed dispersal limitation and negative density dependence. Soil properties have strong patch structures at fine scales, and we investigated whether such heterogeneity contributes to seedling coexistence. METHODS: From January 2011 to January 2014, in a one-hectare area of tropical rain ...
DOI:
10.1007/s11104-019-04027-8

13. Drywell infiltration and hydraulic properties in heterogeneous soil profiles

Author:
Sasidharan, Salini; Bradford, Scott A.; Šimůnek, Jiří; Kraemer, Stephen R.
Source:
Journal of hydrology 2019 v.570 pp. 598-611
ISSN:
0022-1694
Subject:
soil heterogeneity,   etc   ; aquifers; computer software; confidence interval; infiltration rate; isotropy; permeability; soil profiles; soil water; soil water retention; stormwater; surface area; variance;     Show all 13 Subjects
Abstract:
... Drywells are increasingly used to capture stormwater runoff for surface infiltration and aquifer recharge, but little research has examined the role of ubiquitous subsurface heterogeneity in hydraulic properties on drywell performance. Numerical experiments were therefore conducted using the HYDRUS (2D/3D) software to systematically study the influence of subsurface heterogeneity on drywell infilt ...
DOI:
10.1016/j.jhydrol.2018.12.073

14. Ecological niche shift between diploid and tetraploid plants of Fragaria (Rosaceae) in China

Author:
Wan, J.-Z.; Chen, L.-X.; Gao, S.; Song, Y.-B.; Tang, S.-L.; Yu, F.-H.; Li, J.-M.; Dong, M.
Source:
South African journal of botany 2019 v.121 pp. 68-75
ISSN:
0254-6299
Subject:
soil heterogeneity,   etc   ; Fragaria; altitude; climate; coniferous forests; diploidy; ecosystems; evolution; flow cytometry; genome; herbaria; models; niches; plant ecology; temperature; tetraploidy; China;     Show all 17 Subjects
Abstract:
... Ecological niche shifts between diploid and tetraploid plants remains a topic with potential for plant ecology and evolution. Here, we identified populations of Fragaria (Rosaceae) from 169 sampling plots, classifying populations into two species groups (diploid and tetraploid) across China using flow cytometry. We then applied niche modeling to assess the ecological niche shift between diploid an ...
DOI:
10.1016/j.sajb.2018.10.027

15. Heterogeneity of soil contamination by 90Sr and its absorption by herbaceous plants in the East Ural Radioactive Trace area

Author:
Mikhailovskaya, L.N.; Modorov, M.V.; Pozolotina, V.N.; Antonova, E.V.
Source:
The Science of the total environment 2019 v.651 pp. 2345-2353
ISSN:
0048-9697
Subject:
soil heterogeneity,   etc   ; Arctium; Bromus inermis subsp. inermis; Lathyrus pratensis; Leonurus; Rumex confertus; Urtica dioica; absorption; accidents; geometry; herbaceous plants; radionuclides; soil pollution; soil sampling; strontium;     Show all 15 Subjects
Abstract:
... A nuclear accident occurred at the production association Mayak in the Urals in 1957. Approximately 74 PBq of radioactive substances were released into the environment, which resulted in the contamination of a vast area, named the East Ural Radioactive Trace (EURT). We have studied the current levels of contamination of soils and plants by 90Sr in the head part of the EURT. The heterogeneity of so ...
DOI:
10.1016/j.scitotenv.2018.10.119

16. Use of satellite images to differentiate productivity zones in commercial processing tomato farms

Author:
Campillo, C.; Carrasco, J.; Gordillo, J. L.; Cordoba, A.; Macua, J. I.
Source:
Acta horticulturae 2019 no.1233 pp. 97-104
ISSN:
0567-7572
Subject:
soil heterogeneity,   etc   ; commercial farms; crop production; crops; cultivars; farmers; geographic information systems; image analysis; irrigation systems; normalized difference vegetation index; planning; remote sensing; satellites; tomatoes;     Show all 14 Subjects
Abstract:
... New trends in crop production and new technologies are enabling better management of large fields with great soil heterogeneity. In this sense, the improvement in the temporal and spatial resolution of the new satellites produces images of the crop throughout its crop cycle. With vegetative indexes such as the normalized difference vegetation index (NDVI), an evolution of the development of the to ...
DOI:
10.17660/ActaHortic.2019.1233.15

17. The Effect of Geological Heterogeneity and Groundwater Table Depth on the Hydraulic Performance of Stormwater Infiltration Facilities

Author:
D’Aniello, Andrea; Cimorelli, Luigi; Cozzolino, Luca; Pianese, Domenico
Source:
Water resources management 2019 v.33 no.3 pp. 1147-1166
ISSN:
0920-4741
Subject:
soil heterogeneity,   etc   ; groundwater recharge; hydrologic cycle; infiltration rate; infrastructure; mathematical models; saturated conditions; stormwater; stormwater management; uncertainty; urbanization; water quality; water table; watersheds;     Show all 14 Subjects
Abstract:
... Urbanization has led to a substantial change in the hydrological cycle of urban catchments. Increased runoff and urban flooding, decreased direct subsurface infiltration and groundwater recharge, deterioration of water quality are among the major effects of this alteration. To alleviate these effects, Low Impact Development (LID) practices have been frequently adopted for stormwater management. Am ...
DOI:
10.1007/s11269-018-2172-5

18. Modelling agro-environmental variables under data availability limitations and scenario managements in an alluvial region of the North China Plain

Author:
Manevski, Kiril; Børgesen, Christen D.; Li, Xiaoxin; Andersen, Mathias N.; Zhang, Xiying; Shen, Yanjun; Hu, Chunsheng
Source:
Environmental modelling & software 2019 v.111 pp. 94-107
ISSN:
1364-8152
Subject:
soil heterogeneity,   etc   ; Food and Agriculture Organization; agroecosystems; crop yield; drainage; environmental models; leaching; meteorological data; nitrogen; simulation models; soil surveys; China;     Show all 12 Subjects
Abstract:
... Single or multiple weather station data were combined with soil textural data ranging from low to high detail, i.e., point data from a field station, the FAO Digital Soil Map of the World and a comprehensive data from national soil survey, as input to the Daisy model to simulate and upscale crop yields, drainage and nitrogen leaching for an agroecosystem in the North China Plain. Increasing the de ...
DOI:
10.1016/j.envsoft.2018.10.001

19. Importance of reporting ancillary site characteristics, and management and disturbance information at ICOS stations

Author:
Saunders, Matthew; Dengel, Sigrid; Kolari, Pasi; Moureaux, Christine; Montagnani, Leonardo; Ceschia, Eric; Altimir, Nuria; López-Ballesteros, Ana; Marańon-Jimenez, Sara; Acosta, Manuel; Klumpp, Katja; Gielen, Bert; de Beeck, Maarten Op; Hörtnagl, Lukas; Merbold, Lutz; Osborne, Bruce; Grünwald, Thomas; Arrouays, Dominique; Boukir, Hakima; Saby, Nicolas; Nicolini, Giacomo; Papale, Dario; Jones, Michael
Source:
International agrophysics 2018 v.32 no.4 pp. 457-469
ISSN:
2300-8725
Subject:
soil heterogeneity,   etc   ; carbon; climate change; ecosystems; greenhouse gases; infrastructure; nitrogen; temporal variation; vegetation;     Show all 9 Subjects
Abstract:
... There are many factors that influence ecosystem scale carbon, nitrogen and greenhouse gas dynamics, including the inherent heterogeneity of soils and vegetation, anthropogenic management interventions, and biotic and abiotic disturbance events. It is important therefore, to document the characteristics of the soils and vegetation and to accurately report all management activities, and disturbance ...
DOI:
10.1515/intag-2017-0040

20. Spatial variability of saprolitic soil properties and relationship with joint set orientation of parent rock: Insights from cases in Hong Kong

Author:
Liu, W.F.; Leung, Y.F.
Source:
Engineering geology 2018 v.246 pp. 36-44
ISSN:
0013-7952
Subject:
soil heterogeneity,   etc   ; engineering; geostatistics; granite; landslides; mechanical properties; models; parent rock; surveys; weathering; China;     Show all 11 Subjects
Abstract:
... Geomaterials are known to be associated with significant heterogeneity, and the natural variations in properties can affect the occurrence of landslides and failure of engineering structures. While these variations are often observed to be spatially correlated, the correlation patterns and their relationships with the geological origins of the materials are not well understood. This study utilizes ...
DOI:
10.1016/j.enggeo.2018.09.015