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1. National-scale maps for soil aggregate size distribution parameters using pedotransfer functions and digital soil mapping data products

Author:
Naveen K. Purushothaman; Nagarjuna N. Reddy; Bhabani S. Das
Source:
Geoderma 2022 v.424 pp. 116006
ISSN:
0016-7061
Subject:
soil aggregates,   etc   ; data collection; landscapes; models; soil structure;     Show all 5 Subjects
Abstract:
... Soil aggregate size distribution (ASD) is a key soil property for quantitative characterization of soil structure. Typically, dry and wet sieving methods are followed to measure mass fractions of soil aggregates under each aggregate size class and their cumulative fractions are used to estimate ASD parameters. In general, available soil ASD databases are small and a comprehensive assessment of exi ...
DOI:
10.1016/j.geoderma.2022.116006

2. Effects of raindrop temperature on the contributions of slaking and mechanical striking to aggregate disintegration during splash erosion

Author:
Hairu Li; Ju Gu; Gang Liu; Mohamed A.M. Abd Elbasit; Feinan Hu; Tingrun Zou; Liang Wang; Qiong Zhang; Zhen Guo
Source:
Soil & tillage research 2022 v.224 pp. 105518
ISSN:
0167-1987
Subject:
soil aggregates,   etc   ; ethanol; prediction; rain; research; splash erosion; temperature; tillage;     Show all 8 Subjects
Abstract:
... The influence of raindrop temperature on the soil erosion process has been reported. However, the role of raindrop temperature in aggregate disintegration is unclear. The aims of this study are to investigate the effects of raindrop temperatures on soil aggregate disintegration and to evaluate their effects on the contribution of slaking and mechanical striking to splash erosion. Deionized water a ...
DOI:
10.1016/j.still.2022.105518

3. Effects of soil internal forces on splash detachment and transport of aggregate fragments in Mollisols of Northeast China

Author:
Ren‐tian Ma; Weizhen Guo; Fei‐Nan Hu; Chen‐Yang Xu; Gang Liu; Shi‐wei Zhao; Fen‐li Zheng
Source:
European journal of soil science 2022 v.73 no.4 pp. e13273
ISSN:
1351-0754
Subject:
soil aggregates,   etc   ; Mollisols; electrolytes; rain; rainfall simulation; splash erosion; China;     Show all 7 Subjects
Abstract:
... Soil internal forces can affect aggregate breakdown, and then impact splash detachment and transport of aggregate fragments. However, currently, the processes of soil splash detachment and transport under different soil internal forces are still not fully understood. Thus, to determine the effects of soil internal forces on the splash transport process, two soils (Binxian soil and Keshan soil) in ...
DOI:
10.1111/ejss.13273

4. Aggregate dynamics and intra-aggregate carbon contents as influenced by long-term wheat production management in semi-arid South Africa

Author:
LS Tlomatsana; PF Loke; E Kotzé; MP Aghoghovwia
Source:
South African journal of plant and soil = 2022 v.39 no.2 pp. 94-101
ISSN:
2167-034X
Subject:
soil aggregates,   etc   ; carbon; mulches; no-tillage; straw; stubble; wheat; South Africa;     Show all 8 Subjects
Abstract:
... Soil aggregate dynamics have received renewed interest due to their relevance in carbon (C) stabilisation. This study evaluated changes in aggregate-size distribution and intra-aggregate C following 41 years of wheat production in semi-arid central South Africa. Management practices that have been applied for 41 years include two straw management protocols (unburned and burned), three tillage syst ...
DOI:
10.1080/02571862.2021.2009049

5. Effects of Nitrogen Addition on Microbial Carbon Use Efficiency of Soil Aggregates in Abandoned Grassland on the Loess Plateau of China

Author:
Xue Zhao; Xiaoyue Lu; Jiayi Yang; Dan Zhang; Chengjie Ren; Xiukang Wang; Xiaoxi Zhang; Jian Deng
Source:
Forests 2022 v.13 no.2 pp. -
ISSN:
1999-4907
Subject:
soil aggregates,   etc   ; grasslands; microbial carbon; nitrogen; soil organic carbon; stoichiometry; China;     Show all 7 Subjects
Abstract:
... Soil microbial carbon use efficiency (CUE) plays a crucial role in terrestrial C cycling. However, how microbial CUE responds to nitrogen addition and its mechanisms in soil aggregates from abandoned grassland systems remains poorly understood. In this study, we designed a nitrogen (N) addition experiment (0 (N0), 10 (N1), 20 (N2), 40 (N3), 80 (N4) kg N ha⁻¹yr⁻¹) from abandoned grassland on the Lo ...
DOI:
10.3390/f13020276

6. Potential of visible-near infrared spectroscopy for the determination of three soil aggregate stability indices

Author:
Ernest Afriyie; Ann Verdoodt; Abdul M. Mouazen
Source:
Soil & tillage research 2022 v.215 pp. 105218
ISSN:
0167-1987
Subject:
soil aggregates,   etc   ; aggregate stability; air drying; labor; prediction; research; soil water; tillage;     Show all 8 Subjects
Abstract:
... Aggregate stability (AS) is an important parameter to evaluate soil resistance to erosion. The conventional determination methods to measure AS are time consuming, difficult and labour intensive. Visible (vis) and near infrared (NIR) spectroscopy could be a better alternative to the conventional determination methods of AS. This study explored the possibilities of estimating three AS indices, refl ...
DOI:
10.1016/j.still.2021.105218

7. Modeling soil aggregate fracture using the discrete element method

Author:
Frederik F. Foldager; Lars J. Munkholm; Ole Balling; Radu Serban; Dan Negrut; Richard J. Heck; Ole Green
Source:
Soil & tillage research 2022 v.218 pp. 105295
ISSN:
0167-1987
Subject:
soil aggregates,   etc   ; Weibull statistics; arable soils; friction; porosity; research; tensile strength; tillage;     Show all 8 Subjects
Abstract:
... The Discrete Element Method (DEM) is a suitable approach for modeling and simulating arable soil and tillage processes. In this work, we focus on modeling soil fragmentation which is a vital element of many soil treatments. We present a method for computing the indirect tensile strength of soil aggregates through simulation. DEM aggregates are constructed as spherical clusters of smaller spherical ...
DOI:
10.1016/j.still.2021.105295

8. Soil respiration, aggregate stability and nutrient availability affected by drying duration and drying-rewetting frequency

Author:
Zezhou Zhang; Dongmei Wang; Mengxun Li
Source:
Geoderma 2022 v.413 pp. 115743
ISSN:
0016-7061
Subject:
soil aggregates,   etc   ; aggregate stability; drought; edaphic factors; farms; forests; nitrification; nutrient availability; soil respiration; China;     Show all 10 Subjects
Abstract:
... Wetting dry soil is well known for generating respiration and nutrient pulses (the “Birch effect”), but the effects of frequent drying-rewetting (DRW) cycles, especially the effects regarding nutrient availability, have not been well investigated. This study was designed to determine how DRW frequency influences soil respiration, aggregate stability and nutrient availability. Soil was collected fr ...
DOI:
10.1016/j.geoderma.2022.115743

9. Specific ion effects on soil aggregate stability and rainfall splash erosion

Author:
Jingfang Liu; Feinan Hu; Chenyang Xu; Wei Du; Zhenghong Yu; Shiwei Zhao; Fenli Zheng
Source:
International soil and water conservation research 2022 v.10 no.4 pp. 557-564
ISSN:
2095-6339
Subject:
soil aggregates,   etc   ; aggregate stability; cations; rain; rainfall simulation; research; salt concentration; splash erosion; water conservation;     Show all 9 Subjects
Abstract:
... Soil interparticle forces can pose important effects on soil aggregate stability and rainfall splash erosion. Meanwhile, these interparticle forces are strongly influenced by specific ion effects. In this study, we applied three monovalent cations (Li⁺, Na⁺, and K⁺) with various concentrations to investigate the influence of specific ion effects on aggregate stability and splash erosion via pipett ...
DOI:
10.1016/j.iswcr.2022.02.001

10. Forest conversion effects on soil organic carbon are regulated by soil aggregate stability and not by recalcitrance: Evidence from a reforestation experiment

Author:
Chao Xu; Teng-Chiu Lin; Zhijie Yang; Xiaofei Liu; Decheng Xiong; Shidong Chen; Fuzhong Wu; Yusheng Yang
Source:
Catena 2022 v.219 pp. 106613
ISSN:
0341-8162
Subject:
soil aggregates,   etc   ; Castanopsis; Cunninghamia lanceolata; aggregate stability; catenas; deforestation; disturbed soils; reforestation; secondary forests; soil organic carbon;     Show all 10 Subjects
Abstract:
... Preservation of biochemically recalcitrant organic matter and protection within soil aggregates are two important mechanisms of soil organic carbon (SOC) preservation, but their relative importance remains unclear. In this study, we converted part of a mature secondary forest to two young plantation forests (Castanopsis carlesii and Chinese fir) and an assisted naturally regenerated (ANR) forest i ...
DOI:
10.1016/j.catena.2022.106613

11. Freeze-thaw cycles increase the mobility of phosphorus fractions based on soil aggregate in restored wetlands

Author:
Yingxin Li; Lixia Wang; Shaoqing Zhang; Lei Tian; Yang Ou; Baixing Yan; Hu Cui; Meiwen Bao; Aizhen Liang
Source:
Catena 2022 v.209 pp. 105846
ISSN:
0341-8162
Subject:
soil aggregates,   etc   ; carbon; catenas; field capacity; freeze-thaw cycles; nitrogen; phosphorus; risk reduction; total nitrogen; water content;     Show all 10 Subjects
Abstract:
... Available information about the effects of freeze–thaw cycles (FTCs) and soil aggregate structure on the mobility of phosphorus (P) fractions is limited. Here, soil column experiments with different initial moisture contents (saturated moisture content and field capacity) were used to study the redistribution of P fractions in soil aggregates after 0, 2, 5, and 10 freeze–thaw cycles. The results s ...
DOI:
10.1016/j.catena.2021.105846

12. Variations in soil aggregate distribution and associated organic carbon and nitrogen fractions in long-term continuous vegetable rotation soil by nitrogen fertilization and plastic film mulching

Author:
Fangli Wang; Yu Liu; Bin Liang; Jun Liu; Haiying Zong; Xiaohong Guo; Xuexia Wang; Ningning Song
Source:
Science of the total environment 2022 v.835 pp. 155420
ISSN:
0048-9697
Subject:
soil aggregates,   etc   ; aggregate stability; environment; greenhouse gases; nitrogen fertilizers; organic carbon; plastic film; soil fertility; sustainable development; vegetables;     Show all 10 Subjects
Abstract:
... Small changes in soil aggregates-associated organic carbon (OC) can induce huge fluctuations in greenhouse gas emissions. However, there is a knowledge gap on the responses to nitrogen (N) fertilization under plastic film mulching, especially in long-term continuous rotation systems. This study assessed the impacts of plastic film mulching and N fertilization on the soil aggregate distribution and ...
DOI:
10.1016/j.scitotenv.2022.155420

13. Effect of Dry Soil Aggregate Size on Microplastic Distribution and Its Implications for Microplastic Emissions Induced by Wind Erosion

Author:
Meiniu Yang; Xia Tian; Zhongling Guo; Chunping Chang; Jifeng Li; Zixiao Guo; Huiru Li; Ruijuan Liu; Rende Wang; Qing Li; Xueyong Zou
Source:
Environmental science & technology letters 2022 v.9 no.7 pp. 618-624
ISSN:
2328-8930
Subject:
soil aggregates,   etc   ; aggregate stability; dust; microplastics; nitrogen; organic matter; particle size; pollutants; sand; technology; wind erosion; wind speed;     Show all 12 Subjects
Abstract:
... Microplastics (MPs) have become a problematic pollutant in different environments. Dry soil aggregates may have a remarkable influence on the emissions of MPs from surface soil due to wind erosion. Here, we sampled surface soils and monitored wind erosion events to investigate the number of MPs distributed in different dry soil aggregate sizes and the implications for MP emissions induced by wind ...
DOI:
10.1021/acs.estlett.2c00338

14. Quantifying influence of tillage practices on soil aggregate microstructure using synchrotron‐based micro‐computed tomography

Author:
Yan Gao; Aizhen Liang; Ruqin Fan; Yafei Guo; Yan Zhang; Neil McLaughlin; Xuewen Chen; Haifeng Zheng; Donghui Wu
Source:
Soil use and management 2022 v.38 no.1 pp. 850-860
ISSN:
0266-0032
Subject:
soil aggregates,   etc   ; administrative management; conventional tillage; micro-computed tomography; microstructure; porosity; ridge tillage; soil aggregation; soil structure; China;     Show all 10 Subjects
Abstract:
... Studying the internal structure of soil aggregates is an insightful way to improve the understanding of soil aggregation process. However, it is still not clear how the macroaggregate pore structure is influenced by the application of long‐term tillage practices. In this study, we aimed to determine the differences in macroaggregate pore structure among long‐term tillage practices using micro‐comp ...
DOI:
10.1111/sum.12755

15. Soil erosion progression under rill and gully erosion processes and its effect on variations of mechanisms controlling C mineralization ratio

Author:
Neda Mohseni; Seyed Reza Hosseinzadeh
Source:
International journal of ecohydrology & hydrobiology 2022 v.22 no.2 pp. 370-378
ISSN:
1642-3593
Subject:
soil aggregates,   etc   ; aggregate stability; biosphere; clay; empirical models; gully erosion; hydrobiology; labile carbon; microbial carbon; mineralization; rill erosion; surveys;     Show all 12 Subjects
Abstract:
... The progression of water erosion patterns from rill to gully erosion significantly affects the level of soil aggregate degradation, and thereby stimulates variations in the biochemical mechanisms controlling the OC mineralization ratio. These conditions can affect the exchange of carbon from biosphere to atmosphere. We examined the effect of erosion progression on the physical and biochemical soil ...
DOI:
10.1016/j.ecohyd.2021.07.008

16. Aggregate stability and soil surface sealing in irrigated soils under no‐tillage versus conventional tillage

Author:
Luca Grandinetti; Carlos Cantero‐Martínez; María Concepción Ramos
Source:
Land degradation & development 2022 v.33 no.13 pp. 2379-2389
ISSN:
1085-3278
Subject:
soil aggregates,   etc   ; aggregate stability; conventional tillage; corn; irrigation; land degradation; no-tillage; saturated hydraulic conductivity; seals; soil organic carbon;     Show all 10 Subjects
Abstract:
... The effect of no‐tillage (NT) (zero tillage) versus conventional tillage (CT) has been evaluated in rainfed conditions but has seldom been studied under irrigation, where soil sealing favours soil degradation. To contribute to this knowledge, this research analyses soil aggregate stability under disaggregation forces produced under irrigation (causing slaking and mechanical breakdown) and the susc ...
DOI:
10.1002/ldr.4316

17. Forestation delivers significantly more effective results in soil C and N sequestrations than natural succession on badly degraded areas: Evidence from the Central Loess Plateau case

Author:
Lingbo Dong; Jiwei Li; Yulin Liu; Xuying Hai; Miaoyu Li; Jianzhao Wu; Xiaozhen Wang; Zhouping Shangguan; Zhengchao Zhou; Lei Deng
Source:
Catena 2022 v.208 pp. 105734
ISSN:
0341-8162
Subject:
soil aggregates,   etc   ; afforestation; aggregate stability; atmospheric precipitation; catenas; cropland; ecological restoration; nitrogen; phytomass; soil organic carbon; total nitrogen; China;     Show all 12 Subjects
Abstract:
... Vegetation restoration is an important factor affecting soil carbon (C) and nitrogen (N) sequestration. However, the effects of the type of vegetation restoration on soil C and N sequestration varies owing to different environmental conditions. Therefore, additional studies should explore the effects of vegetation restoration type on soil C and N sequestration, especially between natural restorati ...
DOI:
10.1016/j.catena.2021.105734

18. Investigating intra-aggregate microstructure characteristics and influencing factors of six soil types along a climatic gradient

Author:
Jue Peng; Xinliang Wu; Shimin Ni; Junguang Wang; Yantun Song; Chongfa Cai
Source:
Catena 2022 v.210 pp. 105867
ISSN:
0341-8162
Subject:
soil aggregates,   etc   ; Alisols; Ferralsols; Luvisols; Phaeozems; catenas; micro-computed tomography; microstructure; porosity; soil aggregation; soil organic carbon; soil profiles;     Show all 12 Subjects
Abstract:
... Pore structure can reflect the soil aggregation process, determine various physical, chemical and biological processes in aggregates. This study investigates variations in the intra-aggregate microstructure (porosity, pore size distribution, and pore shape) of six different weathered soils across temperate (Haplic Phaeozems, HP; Haplic Luvisols, HL; Calcic Luvisols, CL), subtropical (Ferric Luviso ...
DOI:
10.1016/j.catena.2021.105867

19. Effects of straw mulching on predatory myxobacterial communities in different soil aggregates under wheat-corn rotation

Author:
Zhaojun Wu; Yang Li; Hao Chen; Jixiang Rao; Qingye Sun
Source:
Environmental science and pollution research 2022 v.29 no.19 pp. 29062-29074
ISSN:
0944-1344
Subject:
soil aggregates,   etc   ; Cystobacteraceae; Polyangiaceae; community structure; myxobacteria; pollution; research; soil bacteria; straw; straw mulches; sustainable agriculture; total organic carbon; wastes;     Show all 13 Subjects
Abstract:
... Crop straw mulching is an important organic supplement in sustainable agriculture; however, the effect of increased organic matter on the diversity of micropredators such as myxobacteria and the correlation between myxobacteria and microorganisms have been little explored. In the current investigation, high-throughput sequencing was performed to analyze the myxobacterial community composition in a ...
DOI:
10.1007/s11356-021-18350-0

20. Wind erosion potential from stover harvest in the Central Plains: Measurements and simulations

Author:
John Tatarko; DeAnn Presley; Kyle Mankin
Source:
Soil & tillage research 2022 v.224 pp. 105486
ISSN:
0167-1987
Subject:
soil aggregates,   etc   ; biomass; corn; erodibility; fuel production; private sector; research; roughness; soil aggregation; spring; stover; tillage; wind; wind erosion; Kansas;     Show all 15 Subjects
Abstract:
... Removal of crop residues for biofuel production can potentially increase the erodibility of a soil by not only exposing the soil surface to winds but also affecting changes in soil aggregation and roughness. Field studies at both Colby and Ottawa, Kansas were conducted to determine the effects of long-term residue removal on soil wind erodibility. Corn residue was removed from plots at 0%, 25%, 50 ...
DOI:
10.1016/j.still.2022.105486