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1. Development of cracks in soil: An improved physical model

Author:
Zhu, Lei; Shen, Tongqing; Ma, Rong; Fan, Dongjun; Zhang, Yonggen; Zha, Yuanyuan
Source:
Geoderma 2020 v.366 pp. 114258
ISSN:
0016-7061
Subject:
agricultural soils; clay soils; soil cracks,   etc   ; drying; mathematical models; prediction; roots; shrinkage; soil permeability; soil strength;     Show all 10 Subjects
Abstract:
... Cracks are common in nature and affect a number of soil properties. They increase the soil permeability, reduce the soil strength and stability, and thus affect the growth of plant roots. Characterization of crack networks in clay soils is needed to quantify the soil-plant relationships. This paper presents a numerical model of the desiccation cracking process, which is based on a lattice of Hooke ...
DOI:
10.1016/j.geoderma.2020.114258

2. Soil mapping based on assessment of environmental similarity and selection of calculating samples

Author:
Li, Yao; Zhang, Na; Li, Run-Kui; Liu, Cheng-Yu; Shen, Jing; Jing, Yong-Cai
Source:
Catena 2020 v.188 pp. 104379
ISSN:
0341-8162
Subject:
soil properties; soil sampling; soil surveys,   etc   ; models; prediction; uncertainty;     Show all 6 Subjects
Abstract:
... Many predictive soil mapping (PSM) methods encounter two problems. One is how to construct a similarity index that can indicate not only the similarity of an environmental covariate between sites but also the directional difference of the covariate itself between sites and predict the soil property values beyond the range of sample values. Another is how to determine which soil samples should be u ...
DOI:
10.1016/j.catena.2019.104379

3. Effect of Leifsonia sp. on retardation of uranium in natural soil and its potential mechanisms

Author:
Tan, Wen-fa; Li, Yuan; Guo, Feng; Wang, Ya-chao; Ding, Lei; Mumford, Kathryn; Lv, Jun-wen; Deng, Qin-wen; Fang, Qi; Zhang, Xiao-wen
Source:
Journal of environmental radioactivity 2020 v.217 pp. 106202
ISSN:
0265-931X
Subject:
immobilization in soil; polluted soils; soil bacteria,   etc   ; Leifsonia; bioremediation; mining; radioactivity; soil pollution; soil remediation; soil sampling; toxicity; uranium;     Show all 12 Subjects
Abstract:
... Uranium mining and milling activities for many years resulted in release of uranium into the adjoining soil in varying degrees. Bioremediation approaches (i.e., immobilization via the action of bacteria) resulting in uranium bearing solid is supposed as an economic and clean in-situ approach for the treatment of uranium contaminated sites. This study purposes to determine the immobilization effici ...
DOI:
10.1016/j.jenvrad.2020.106202

4. Three-dimensional quantification of macropore networks of different compacted soils from opencast coal mine area using X-ray computed tomography

Author:
Feng, Yu; Wang, Jinman; Bai, Zhongke; Reading, Lucy; Jing, Zhaorui
Source:
Soil & tillage research 2020 v.198 pp. 104567
ISSN:
0167-1987
Subject:
compacted soils; mined soils; soil compaction,   etc   ; coal; computed tomography; macropores; mining; monitoring; soil density; soil restoration; soil sampling;     Show all 11 Subjects
Abstract:
... Heavy machinery compaction in mining area is widespread, and seriously jeopardizes soil restoration. Characterization of soil macropores with three-dimensional methods is essential for understanding the reclaimed minesoil (RMS) development. The aim of this study was to demonstrate the application of X-ray computed tomographic (CT) scanning for analyzing soil macropore structure and to explore how ...
DOI:
10.1016/j.still.2019.104567

5. An examination of the building pressure cycling technique as a tool in vapor intrusion investigations with analytical simulations

Author:
Yao, Yijun; Zuo, Jianping; Luo, Jian; Chen, Qiang; Ström, Jonathan; Suuberg, Eric
Source:
Journal of hazardous materials 2020 v.389 pp. 121915
ISSN:
0304-3894
Subject:
polluted soils; soil air,   etc   ; analytical methods; vapors;     Show all 4 Subjects
Abstract:
... The building pressure cycling (BPC) technique has been developed and applied by vapor intrusion (VI) site investigators to obtain estimates of reasonable maximum exposures and to identify possible background sources of contaminant vapors. This method assumes that by application of consistent indoor depressurization one can increase the average contaminated soil gas entry rate into a building of in ...
DOI:
10.1016/j.jhazmat.2019.121915
PubMed:
31882341
PubMed Central:
PMC7082193

6. LDPE microplastics significantly alter the temporal turnover of soil microbial communities

Author:
Wang, Jie; Huang, Muke; Wang, Qian; Sun, Yuanze; Zhao, Yanran; Huang, Yi
Source:
The Science of the total environment 2020 v.726 pp. 138682
ISSN:
0048-9697
Subject:
soil; soil bacteria; soil ecosystems,   etc   ; bacterial communities; community structure; microplastics; polyethylene; sequence analysis; soil sampling;     Show all 9 Subjects
Abstract:
... Although the ubiquitous presence of microplastics in various environments is increasingly well studied, knowledge of the effects of microplastics on ambient microbial communities is still insufficient. To estimate the response of soil bacterial community succession and temporal turnover to microplastic amendment, a soil microcosm experiment was carried out with polyethylene microplastics. The soil ...
DOI:
10.1016/j.scitotenv.2020.138682

7. Evaluation of conditioned Latin hypercube sampling for soil mapping based on a machine learning method

Author:
Yang, Lin; Li, Xinming; Shi, Jingjing; Shen, Feixue; Qi, Feng; Gao, Binbo; Chen, Ziyue; Zhu, A-Xing; Zhou, Chenghu
Source:
Geoderma 2020 v.369 pp. 114337
ISSN:
0016-7061
Subject:
soil; soil formation; soil map,   etc   ; artificial intelligence; environmental factors; prediction; sample size; sampling; soil surveys; uncertainty;     Show all 10 Subjects
Abstract:
... Sampling design plays an important role in soil survey and soil mapping. Conditioned Latin hypercube sampling (cLHS) has been proven as an efficient sampling strategy and used widely in digital soil mapping. cLHS samples are randomly selected in each stratum of environmental variables, thus the produced sample sets can vary significantly at different runs with the same sample size. Although variat ...
DOI:
10.1016/j.geoderma.2020.114337

8. Estimation of soil penetration resistance with standardized moisture using modeling by artificial neural networks

Author:
Fernandes, Mariele Monique Honorato; Coelho, Anderson Prates; Silva, Matheus Flavio da; Bertonha, Rafael Scabello; Queiroz, Renata Fernandes de; Furlani, Carlos Eduardo Angeli; Fernandes, Carolina
Source:
Catena 2020 v.189 pp. 104505
ISSN:
0341-8162
Subject:
soil compaction; soil penetration resistance; soil sampling,   etc   ; monitoring; neural networks; soil water;     Show all 6 Subjects
Abstract:
... One of the most used evaluations to monitor soil compaction is based on soil penetration resistance (SPR). However, since SPR is influenced by soil moisture, this evaluation performed in the field may often lead to incorrect interpretations. This study aimed to evaluate the accuracy of models in the estimation of soil penetration resistance with standardized moisture (SPRlab) based on soil penetra ...
DOI:
10.1016/j.catena.2020.104505

9. Biochar’s stability and effect on the content, composition and turnover of soil organic carbon

Author:
Han, Lanfang; Sun, Ke; Yang, Yan; Xia, Xinghui; Li, Fangbai; Yang, Zhifeng; Xing, Baoshan
Source:
Geoderma 2020 v.364 pp. 114184
ISSN:
0016-7061
Subject:
clay soils; sandy soils; soil minerals,   etc   ; biochar; environmental impact; humic substances; mineralization; soil organic carbon; temperature;     Show all 9 Subjects
Abstract:
... Extensive application of biochar to soil exerts a profound effect on organic carbon (OC) in soils. However, the impact of biochar on the content and composition of OC has not been comprehensively summarized. This review provided a detailed examination on the stability of biochar and its effect on the amount, composition and turnover of soil OC, with key limitations and issues recognized. The direc ...
DOI:
10.1016/j.geoderma.2020.114184

10. A review on remediation technologies for nickel-contaminated soil

Author:
Chen, Xueyan; Kumari, Deepika; Cao, C J; Plaza, Grażyna; Achal, Varenyam
Source:
Human and ecological risk assessment 2020 v.26 no.3 pp. 571-585
ISSN:
1549-7860
Subject:
arable soils; polluted soils; soil remediation,   etc   ; encapsulation; heavy metals; industrialization; nickel; phytoremediation; soil washing; urbanization; China;     Show all 11 Subjects
Abstract:
... With the rapid pace of industrialization and urbanization, the environmental safety of soil is a worldwide concern. In China alone, one-fifth of the arable land is reported to be contaminated with heavy metals including nickel. In this review, current research on nickel remediation, specifically the various remediation technologies including physical and chemical remediation methods, such as immob ...
DOI:
10.1080/10807039.2018.1539639

11. Influence of a layered liquefiable soil on seismic site response using physical modeling and numerical simulation

Author:
Adampira, Mohammad; Derakhshandi, Mehdi
Source:
Engineering geology 2020 v.266 pp. 105462
ISSN:
0013-7952
Subject:
soil,   etc   ; geophysics; mathematical models;     Show all 3 Subjects
Abstract:
... In this research, the seismic behavior of liquefiable sub-layers and their effect on seismic ground response have been evaluated. The initial patterns of seismic response along the height of a layered liquefiable soil are extracted using a series of shaking table testing. The sub-layers of the shaking table models were built with different densities and the models were subjected to specific record ...
DOI:
10.1016/j.enggeo.2019.105462

12. A note on knowledge discovery and machine learning in digital soil mapping

Author:
Wadoux, Alexandre M. J.‐C.; Samuel‐Rosa, Alessandro; Poggio, Laura; Mulder, Vera Leatitia
Source:
European journal of soil science 2020 v.71 no.2 pp. 133-136
ISSN:
1351-0754
Subject:
forest soils; soil organic carbon; soil properties,   etc   ; artificial intelligence; case studies; prediction; soil surveys; topsoil;     Show all 8 Subjects
Abstract:
... In digital soil mapping, machine learning (ML) techniques are being used to infer a relationship between a soil property and the covariates. The information derived from this process is often translated into pedological knowledge. This mechanism is referred to as knowledge discovery. This study shows that knowledge discovery based on ML must be treated with caution. We show how pseudo‐covariates c ...
DOI:
10.1111/ejss.12909

13. Bibliometric analysis of research on soil health from 1999 to 2018

Author:
Liu, Yanan; Wu, Kening; Zhao, Rui
Source:
Journal of soils and sediments 2020 v.20 no.3 pp. 1513-1525
ISSN:
1439-0108
Subject:
soil; soil ecosystems; soil pollution,   etc   ; bibliometric analysis; computer software; prediction; research institutions; soil quality; United States;     Show all 9 Subjects
Abstract:
... PURPOSE: Soil health has been a major focus of research by international scholars because it is an important factor that supports human survival and development. However, few scholars have performed bibliometric analyses of research on soil health. This study investigated the current research status and development characteristics of soil health. MATERIALS AND METHODS: We performed a bibliometric ...
DOI:
10.1007/s11368-019-02519-9

14. The stability and fate of Soil Organic Carbon during the transport phase of soil erosion

Author:
de Nijs, Evy A.; Cammeraat, Erik L.H.
Source:
Earth-science reviews 2020 v.201 pp. 103067
ISSN:
0012-8252
Subject:
soil; soil erosion; soil organic carbon,   etc   ; chemical structure; environmental factors; mineralization; soil transport processes; terminology;     Show all 8 Subjects
Abstract:
... Soil organic carbon (SOC) is the largest pool of non-sedimentary terrestrial carbon (C) and small changes in vertical SOC fluxes in the erosion-transport-deposition system could have a significant effect on atmospheric C levels. The ongoing sink/source discussion related to SOC seems to depend on which mechanisms are dominant during each of the three stages of soil erosion: detachment, transportat ...
DOI:
10.1016/j.earscirev.2019.103067

15. Use of instability curves for the assessment of post-liquefaction stability and deformation of sloping grounds

Author:
Ismael, Bashar; Lombardi, Domenico; Bhattacharya, Subhamoy; Ahmad, Syed Mohd
Source:
Engineering geology 2020 v.265 pp. 105347
ISSN:
0013-7952
Subject:
soil,   etc   ; case studies; deformation;     Show all 3 Subjects
Abstract:
... The paper presents a simplified approach to determine the post-cyclic deformation of liquefied sloping grounds. The approach uses instability curves derived from undrained multi-stage (cyclic+monotonic) triaxial tests. It is shown that the salient aspects of the post-liquefaction deformation can be expressed as a function of the state parameter ψ, defined as the void ratio difference between the c ...
DOI:
10.1016/j.enggeo.2019.105347

16. Research on the distribution of soil water, heat, salt and their response mechanisms under freezing conditions

Author:
Hou, Ren-jie; Li, Tian-xiao; Fu, Qiang; Liu, Dong; Li, Mo; Zhou, Zhao-qiang; Yan, Jia-wen; Zhang, Shuo
Source:
Soil & tillage research 2020 v.196 pp. 104486
ISSN:
0167-1987
Subject:
frozen soils; soil density; soil ecology,   etc   ; cold zones; freezing; freezing point; frost; heat; salinity; soil salts; soil temperature; soil water; soil water content; solutes; water content;     Show all 15 Subjects
Abstract:
... In seasonally frozen soil compartments, freezing affects hydrothermal cycles and solute transport. In order to effectively identify the variation characteristics of soil temperature, moisture and salinity during freezing and the interaction among them, a laboratory unidirectional freezing experiment was set up. During the experiment, three initial gravimetric moisture contents (N1, 18.84 %; N2, 23 ...
DOI:
10.1016/j.still.2019.104486

17. Effects of rainfall intensity and compaction on water transport from opencast coal mine soils: An experimental study

Author:
Wang, Fengjiao; Wang, Jinman
Source:
Hydrological processes 2020 v.34 no.2 pp. 258-269
ISSN:
0885-6087
Subject:
compacted soils; disturbed soils; mined soils,   etc   ; bulk density; coal; engineering; land restoration; mining; rain; rain intensity; runoff; soil compaction; soil density; soil quality; soil surface sealing; China;     Show all 16 Subjects
Abstract:
... The use of heavy machinery during opencast coal mining can result in soil compaction. Severe soil compaction has a negative impact on the transport of water and gas in the soil. In addition, rainfall intensity has traditionally been related to soil surface sealing affecting water transport. To assess the effects of rainfall intensity and compaction on water infiltration and surface runoff in an op ...
DOI:
10.1002/hyp.13582

18. Response of Soil Respiration and Microbial Biomass to Soil Salinity under Different Water Content in the Coastal Areas of Eastern China

Author:
Kechun Wang,; Xu, Junzeng; Li, Yawei; Wang, Haiyu; Wei, Qi; Liao, Linxian; Liu, Xiaoyin
Source:
Eurasian soil science 2020 v.53 no.1 pp. 82-89
ISSN:
1064-2293
Subject:
saline soils; soil carbon; soil electrical conductivity,   etc   ; coasts; field capacity; microbial biomass; microbial carbon; salinity; soil microorganisms; soil respiration; soil salinity; soil water; water content; China;     Show all 14 Subjects
Abstract:
... Knowledge concerning the response of soil carbon transformation to soil moisture and salinity is essential for saline soil improvements and utilization. An incubation experiment with three moisture levels (50, 75 and 100% of field capacity) and six salinity levels (soil electrical conductivity of 1 : 5 soil suspension as 0.25, 1.01, 2.02, 3.21, 4.92 and 6.17 dS m–¹ for S1, S2, S3, S4, S5 and S6 tr ...
DOI:
10.1134/S1064229320010159

19. Partitioning and stability of ionic, nano- and microsized zinc in natural soil suspensions

Author:
Šebesta, Martin; Nemček, Lucia; Urík, Martin; Kolenčík, Marek; Bujdoš, Marek; Vávra, Ivo; Dobročka, Edmund; Matúš, Peter
Source:
The Science of the total environment 2020 v.700 pp. 134445
ISSN:
0048-9697
Subject:
acid soils; alkaline soils; soil pH,   etc   ; liquids; microparticles; nanoparticles; soil sampling; soil solution; zinc; zinc fertilizers; zinc oxide; zinc sulfate;     Show all 12 Subjects
Abstract:
... Batch experiments aimed at solid-liquid distribution of 40 nm engineered zinc oxide nanoparticles (ZnO-NP), microparticles (bulk ZnO), and ionic Zn in ZnSO₄ solution were conducted on eight field soil samples of different characteristics to identify how the form of Zn affects its distribution in soil. The concentration of Zn in different size fractions present in supernatant solutions obtained fro ...
DOI:
10.1016/j.scitotenv.2019.134445

20. Measurement of soil water characteristic curve using HYPROP2

Author:
Shokrana, Md Sami Bin; Ghane, Ehsan
Source:
MethodsX 2020 v.7 pp. 100840
ISSN:
2215-0161
Subject:
clay loam soils; sandy loam soils; soil sampling,   etc   ; deaeration; drainage; equipment; irrigation; models; nutrient transport; soil water; soil water characteristic;     Show all 11 Subjects
Abstract:
... Soil water characteristic curve (SWCC) has an important application in drainage, irrigation, soil physical behavior, and modeling hydrology and nutrient transport. However, measurement of the SWCC is often very time consuming, inaccurate and requires a lot of effort. In order to determine an accurate SWCC, we used HYPROP2. This method article extensively describes the topics which were not covered ...
DOI:
10.1016/j.mex.2020.100840
PubMed:
32274334
PubMed Central:
PMC7132095