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1. Analytical method development and validation for the quantification of metaldehyde in soil

Author:
Nathan Keighley; Carmel Ramwell; David Werner; Chris Sinclair
Source:
MethodsX 2021 v.8 pp. 101482
ISSN:
2215-0161
Subject:
soil sampling,   etc   ; analytical methods; metaldehyde; methanol; soil types; solvents;     Show all 6 Subjects
Abstract:
... Previously published methods for the analysis of metaldehyde were adapted for its reliable quantification in soil extracts. Varied methanol-water extraction solvents were trialed, but the use of pure methanol proved to be the most reliable approach for the scaled down methodology. Analysis of metaldehyde was done using LC-MS. Initially the method had problems with matrix suppression of the signal. ...
DOI:
10.1016/j.mex.2021.101482

2. Analysis of composition and density of soil seed banks of Prosopis juliflora in Afar region rangelands, Northeast Ethiopia

Author:
Wakshum Shiferaw; Sebsebe Demissew; Tamrat Bekele; Ermias Aynekulu; Wolfgang Pitroff
Source:
Rangelands 2021 v.43 no.1 pp. 1-8
ISSN:
0190-0528
Subject:
soil sampling,   etc   ; Prosopis juliflora; buried seeds; density; depth; grasslands; rangelands; soil depth; Ethiopia;     Show all 9 Subjects
Abstract:
... •We analyzed the composition and spatial variations of soil seed banks of plant species and densities of soil seed banks in Prosopis juliflora invaded and noninvaded grasslands.•Soil samples were collected from soil layers of 0 to 3, 3 to 6, and 6 to 9 cm.•The highest density of 1,037 ± 633 seedlings/m² was recovered from a soil depth of 3 to 6 cm. But, the lowest density of 461 ± 315 seedlings/m² ...
DOI:
10.1016/j.rala.2020.10.005

3. Taxonomy, Morphological and Molecular Identification of the Potato Cyst Nematodes, Globodera pallida and G. rostochiensis

Author:
John Wainer; Quang Dinh
Source:
Plants 2021 v.10 no.1 pp. -
ISSN:
2223-7747
Subject:
soil sampling,   etc   ; Globodera pallida; cyst nematodes; detection; extraction; hosts; paper; pathotypes; potatoes; soil; taxonomy;     Show all 11 Subjects
Abstract:
... The scope of this paper is limited to the taxonomy, detection, and reliable morphological and molecular identification of the potato cyst nematodes (PCN) Globodera pallida and G. rostochiensis. It describes the nomenclature, hosts, life cycle, pathotypes, and symptoms of the two species. It also provides detailed instructions for soil sampling and extraction of cysts from soil. The primary focus o ...
DOI:
10.3390/plants10010184

4. Simultaneous amplicon analysis of multiple soil samples using MinION sequencing

Author:
Hiroyuki Kurokochi; Kazutoshi Yoshitake; Ryo Yonezawa; Shuichi Asakawa
Source:
MethodsX 2021 v.8 pp. 101576
ISSN:
2215-0161
Subject:
soil sampling,   etc   ; ecosystems; pedodiversity; reading; sampling; soil bacteria; soil composition; soil fungi; soil types;     Show all 9 Subjects
Abstract:
... The diversity and composition of soil microorganisms needs to be understood as they influence ecosystem processes. MinION is a relatively recent next-generation sequencer, which provides the advantage of sequencing long reads. In this study, two types of soil were prepared experimentally to investigate the possibility of simultaneously analyzing multiple environmental samples using MinION. The Min ...
DOI:
10.1016/j.mex.2021.101576

5. Limiting similarity shapes the functional and phylogenetic structure of root neighborhoods in a subtropical forest

Author:
Wenqi Luo; Runxuan Lan; Dongxia Chen; Bingwei Zhang; Nianxun Xi; Yuanzhi Li; Suqing Fang; Oscar J. Valverde‐Barrantes; David M. Eissenstat; Chengjin Chu; Youshi Wang
Source:
new phytologist 2021 v.229 no.2 pp. 1078-1090
ISSN:
0028-646X
Subject:
soil sampling,   etc   ; ecological differentiation; phylogeny; plant competition; root systems; roots; soil fertility; soil nutrients; tropical forests; woody plants; China;     Show all 11 Subjects
Abstract:
... Environmental filtering and limiting similarity mechanisms can simultaneously structure community assemblages. However, how they shape the functional and phylogenetic structure of root neighborhoods remains unclear, hindering the understanding of belowground community assembly processes and diversity maintenance. In a 50‐ha plot in a subtropical forest, China, we randomly sampled > 2700 root clust ...
DOI:
10.1111/nph.16920

6. Permafrost degradation enhances the risk of mercury release on Qinghai-Tibetan Plateau

Author:
Cuicui Mu; Paul.F. Schuster; Benjamin.W. Abbott; Shichang Kang; Junming Guo; Shiwei Sun; Qingbai Wu; Tingjun Zhang
Source:
Science of the total environment 2020 v.708 pp. 135127
ISSN:
0048-9697
Subject:
soil sampling,   etc   ; mercury; permafrost; vegetation types; China;     Show all 5 Subjects
Abstract:
... Permafrost on the Qinghai-Tibetan Plateau (QTP) has been degrading in the past decades. While the degradation may mobilize previously protected material from the permafrost profile, little is known about the stocks and stability of mercury (Hg) in the QTP permafrost. Here we measured total soil Hg in 265 samples from 15 permafrost cores ranging from 3 to 18 m depth, and 45 active layer (AL) soil s ...
DOI:
10.1016/j.scitotenv.2019.135127

7. A new approach for calculating aggregate stability: Mean weight aggregate stability (MWAS)

Author:
Ekrem Lutfi Aksakal; Ilker Angin; Serdar Sari
Source:
Catena 2020 v.194 pp. 104708
ISSN:
0341-8162
Subject:
soil sampling,   etc   ; aggregate stability; catenas; sieves; sieving; weight;     Show all 6 Subjects
Abstract:
... Many different methods have been proposed to determine aggregate stability. In most of these methods, certain aggregate size is used to estimate the aggregate stability of the whole soil. Determination of aggregate stability on a certain aggregate size is insufficient to represent the aggregate stability of the whole soil and the results are strongly dependent on the size chosen. Therefore, the de ...
DOI:
10.1016/j.catena.2020.104708

8. Spatiotemporal simulation, early warning, and policy recommendations of the soil heavy metal environmental capacity of the agricultural land in a typical industrial city in China: Case of Zhongshan City

Author:
Yujie Pan; Lei Ding; Shuyun Xie; Min Zeng; Jing Zhang; Hongxia Peng
Source:
Journal of cleaner production 2021 v.285 pp. 124849
ISSN:
0959-6526
Subject:
soil sampling,   etc   ; administrative management; agricultural land; area; cities; geostatistics; heavy metals; issues and policy; linear models; pollution; research; risk; soil; China;     Show all 14 Subjects
Abstract:
... Soil environmental capacity and risk warning are the core contents of soil security research. In this study, geostatistical analysis, a material balance linear model, and an environmental load capacity method were selected to simulate the environmental capacities of eight heavy metals (Hg, As, Cr, Cu, Ni, Pb, Zn and Cd) in the agricultural land of north Zhongshan City. Then, based on the capacity ...
DOI:
10.1016/j.jclepro.2020.124849

9. Transformation of humic substances and functional groups of soil organic carbon after wildfire

Author:
Xin Yue; Shimei Li; Qaiser Hussain; Shengai Jin; Qinghua Liu; Dejie Cui; Xiangyun Song
Source:
Archiv für Acker- und Pflanzenbau und Bodenkunde 2021 v.67 no.1 pp. 29-37
ISSN:
1476-3567
Subject:
soil sampling,   etc   ; correlation; dead wood; fire intensity; fulvic acids; humic acids; humin; moieties; nuclear magnetic resonance spectroscopy; soil organic carbon; wildfires;     Show all 11 Subjects
Abstract:
... The composition of humic substances and structural diversity of soil organic carbon (SOC) can be affected by wildfire. In this study, soil samples were collected after 1 year of no fire, low intensity of fire (dead trees ≤ 30%), moderate intensity of fire (dead trees 30–70%) and high intensity of fire (dead trees ≥ 70%). The amounts of humic acid (HA), fulvic acid (FA) and humin (Hu) were investig ...
DOI:
10.1080/03650340.2019.1702165

10. Grain surface analysis of a hydrophobized sand: Thickness estimation of the soft coating layer

Author:
Hong-Wei Yang; Sérgio D.N. Lourenço; Xin Xing
Source:
Powder technology 2021 v.377 pp. 827-831
ISSN:
0032-5910
Subject:
soil sampling,   etc   ; behavior; coatings; engineering; estimation; grains; interferometers; mechanical properties; paper; particles; sand; soil; surface roughness; technology; thickness; topography; wettability; white light;     Show all 18 Subjects
Abstract:
... Soil grains when treated with dimethyldichlorosilane (DMDCS) create a thin soft coating layer. The presence of such a layer changes the grain surface wettability giving desirable hydraulic properties which has great potential in engineering practice. The thickness of such a layer has been identified to be an influencing parameter for the mechanical properties. But its estimation is not straightfor ...
DOI:
10.1016/j.powtec.2020.09.062

11. Development of a method for studying 241Pu/241Am activity ratio in the soil of the main Semipalatinsk test site areas

Author:
Vladimir Kashirsky; Anton Shatrov; Irina Zvereva; Sergey Lukashenko
Source:
Journal of environmental radioactivity 2020 v.216 pp. 106181
ISSN:
0265-931X
Subject:
soil sampling,   etc   ; americium; analytical specificity; plutonium; radioactivity; radionuclides; soil;     Show all 7 Subjects
Abstract:
... The methodology for determination of ²⁴¹Pu in soils of the main test sites of the Semipalatinsk Test Site (STS) has been developed. The results of ²⁴¹Am and ²⁴¹Pu activity determination in soil samples sampled at the main testing sites of the STS are presented. ²⁴¹Pu/²⁴¹Am activity ratio is calculated. In most cases, on local sites, ²⁴¹Pu/²⁴¹Am activity ratio is in a rather narrow range, which mak ...
DOI:
10.1016/j.jenvrad.2020.106181

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

Author:
Yao Li; Na Zhang; Run-Kui Li; Cheng-Yu Liu; Jing Shen; Yong-Cai Jing
Source:
Catena 2020 v.188 pp. 104379
ISSN:
0341-8162
Subject:
soil sampling,   etc   ; models; prediction; soil properties; soil surveys; 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

13. Determination of ultra-low 236U in environment samples using ICP-MS/MS measurement and chemical separation

Author:
Yanyun Wang; Xiaolin Hou; Weichao Zhang; Luyuan Zhang; Yukun Fan
Source:
Talanta 2021 v.224 pp. 121882
ISSN:
0039-9140
Subject:
soil sampling,   etc   ; borates; carbon dioxide; chromatography; environment; extraction; helium; humans; mass; mass spectrometry; measurement; mine tailings; reference standards; sampling; separation; separators; uranium; China;     Show all 18 Subjects
Abstract:
... ²³⁶U in the environment mainly originates from human nuclear activities. Based on the unique properties of uranium, ²³⁶U can be used as a powerful tracer for investigation of oceanographic and environmental processes. This requires sensitive measuement of ²³⁶U in various environmental samples. Due to the ultra-low radioactive level of ²³⁶U in the environment, its measurement is only possible by ma ...
DOI:
10.1016/j.talanta.2020.121882

14. Functional diversity of microbial communities in two contrasting maize rhizosphere soils

Author:
Chinenyenwa Fortune Chukwuneme; Ayansina Segun Ayangbenro; Olubukola Oluranti Babalola; Funso Raphael Kutu
Source:
Rhizosphere 2021 v.17 pp. 100282
ISSN:
2452-2198
Subject:
soil sampling,   etc   ; DNA; agricultural productivity; corn; fields; functional diversity; grasslands; metagenomics; microbial communities; microbiome; models; physicochemical properties; rhizosphere; soil; species diversity; South Africa;     Show all 16 Subjects
Abstract:
... The characterization of microbial functional diversity proffers the opportunity to understand and manipulate them in various agricultural and biotechnological processes. This study analyzed the functional diversity and metabolic potentials of microbial communities in the rhizosphere of a former grassland and an intensively cultivated land using a shotgun metagenomic approach. We assumed that funct ...
DOI:
10.1016/j.rhisph.2020.100282

15. Fundamental distribution coefficient data and separations using eichrom extraction chromatographic resins

Author:
Mathew Snow; Jessica Ward
Source:
Journal of chromatography 2020 v.1620 pp. 460833
ISSN:
0021-9673
Subject:
soil sampling,   etc   ; cadmium; cation exchange resins; chromatography; molybdenum; sorption; zirconium;     Show all 7 Subjects
Abstract:
... Distribution coefficient (Kd) data provides the analyst with a powerful set of tools for designing elemental chemical separations. While considerable Kd data exists in the literature for traditional anion and cation exchange resins, a comprehensive Kd study for the majority of the periodic table has not been published to date for several newer Eichrom extraction chromatographic resins. Kd values f ...
DOI:
10.1016/j.chroma.2019.460833

16. Interpolation and stratification of multilayer soil property profile from sparse measurements using machine learning methods

Author:
Tengyuan Zhao; Yu Wang
Source:
Engineering geology 2020 v.265 pp. 105430
ISSN:
0013-7952
Subject:
soil sampling,   etc   ; Bayesian theory; artificial intelligence; engineering; geology; soil properties;     Show all 6 Subjects
Abstract:
... Identification of subsurface stratification and characterization of spatially varying soil properties profiles in multiple soil layers are indispensable in geotechnical site investigation. Subsurface soils are often stratified first through visual inspection of soil samples obtained from boreholes or soil behavior type index from cone penetration tests. Then, the soil property profile within each ...
DOI:
10.1016/j.enggeo.2019.105430

17. Spatial distribution of iron forms and features in the dried lake bed of Urmia Lake of Iran

Author:
Amin Mousavi; Farzin Shahbazi; Shahin Oustan; Ali Asghar Jafarzadeh; Budiman Minasny
Source:
Geoderma regional 2020 v.21 pp. e00275
ISSN:
2352-0094
Subject:
soil sampling,   etc   ; Landsat; crystal structure; iron; lakes; models; soil; Iran;     Show all 8 Subjects
Abstract:
... Urmia Lake, located in Iran, has a unique pedological feature as fresh soil materials are being exposed as the lake is shrinking. Overuse of its water resources has caused its water level to drop, particularly in the east shore of that lake. This consequence has caused a serious environmental risk, but created a rare opportunity to investigate the spatial distribution of six iron forms and feature ...
DOI:
10.1016/j.geodrs.2020.e00275

18. Roles of Soil Organic Matter and Humic Substance Structure in Cu and Pb Adsorption in Histosols

Author:
Izabella Bezerra Coutinho; Camila daCosta Barros de Souza; Erica Souto Abreu Lima; Andrés Calderín García; Marcos Gervasio Pereira; Gustavo Souza Valladares; Nelson Moura Brasil do Amaral Sobrinho
Source:
Soil & sediment contamination 2021 v.30 no.2 pp. 148-162
ISSN:
1549-7887
Subject:
soil sampling,   etc   ; Histosols; adsorption; bioavailability; food chain; fulvic acids; information; metals; models; moieties; risk; sediment contamination; soil organic matter; soil properties; sorption isotherms; variability;     Show all 16 Subjects
Abstract:
... Histosols have a high organic matter content and therefore a high variability of structures and chemical functional groups with adsorptive capacity. This study aimed to select the most appropriate models to describe the sorption phenomena of Cu and Pb in Histosols, identify the types of bonds between these metals and soil samples, and assess the influence of soil attributes and soil humic substanc ...
DOI:
10.1080/15320383.2020.1819958

19. Microwave-assisted synthesis of fluorescent silicon quantum dots for ratiometric sensing of Hg (II) based on the regulation of energy transfer

Author:
Wenjia Li; Dong Liu; Daming Dong; Tianyan You
Source:
Talanta 2021 v.226 pp. 122093
ISSN:
0039-9140
Subject:
soil sampling,   etc   ; DNA; assays; behavior; detection; energy transfer; fluorescence; fluorescent dyes; glutathione; humans; microwave ovens; microwave treatment; quantum dots; reliability; silicon; synthesis; temperature; water;     Show all 18 Subjects
Abstract:
... The rapid and sensitive detection of Hg²⁺ is highly required to protect the environmental safety and human healthy. In the present work, a ratiometric fluorescent sensing platform, consisting of silicon quantum dots (SiQDs), Rox-labelled DNA (Rox-DNA), and Exonuclease III (Exo III), is developed for the accurate detection of Hg²⁺. As for fluorescent probe, we report the first use of glutathione as ...
DOI:
10.1016/j.talanta.2021.122093

20. Grazing exclusion alters ecological stoichiometry of plant and soil in degraded alpine grassland

Author:
Chenjun Du; Yongheng Gao
Source:
Agriculture, ecosystems & environment 2021 v.308 pp. 107256
ISSN:
0167-8809
Subject:
soil sampling,   etc   ; agriculture; alpine grasslands; alpine meadows; ecological function; ecosystems; environment; grazing; growing season; knowledge; phytomass; sampling; soil; soil-plant interactions; stoichiometry; water erosion; China;     Show all 17 Subjects
Abstract:
... Grazing exclusion is one of the most effective practices to recover the degraded alpine grasslands in Tibetan Plateau. In addition, ecological stoichiometry serves as a key regulator of ecosystem function and is also closely related to nutrient process. However, knowledge about the plant-soil interactions of stoichiometry throughout the growing season is still poorly understood. In this study, we ...
DOI:
10.1016/j.agee.2020.107256