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1. Diffusivity and sorptivity determination at different soil water contents from horizontal infiltration

Author:
Villarreal, Rafael; Lozano, Luis A.; Melani, Esteban M.; Salazar, María Paz; Otero, María Florencia; Soracco, C. Germán
Source:
Geoderma 2019 v.338 pp. 88-96
ISSN:
0016-7061
Subject:
silt loam soils,   etc   ; diffusivity; hydraulic conductivity; sandy loam soils; soil water; soil water content; Pampas region;     Show all 7 Subjects
Abstract:
... Determination of soil hydraulic properties under non-saturated conditions is crucial in order to describe soil water dynamics in the field. The objectives of this work were: i- to determine soil water diffusivity (D) as a function of soil moisture with a simple lab set-up, based on Whisler et al. (1968) methodology, from soil moisture profiles obtained using capacitive sensors in three contrasting ...
DOI:
10.1016/j.geoderma.2018.11.045

2. Changes in sorption and bioavailability of herbicides in soil amended with fresh and aged biochar

Author:
Gámiz, Beatriz; Velarde, Pilar; Spokas, Kurt A.; Celis, Rafael; Cox, Lucía
Source:
Geoderma 2019 v.337 pp. 341-349
ISSN:
0016-7061
Subject:
silt loam soils,   etc   ; bioavailability; biochar; imazamox; picloram; soil amendments; sorption; temporal variation; terbuthylazine; water solubility; Wisconsin;     Show all 11 Subjects
Abstract:
... Knowledge of long-term pesticide behavior in biochar (BC) amended soil is still contradictory. In this work, we compared the sorption of three highly persistent and ionizable pesticides [two anionic (imazamox and picloram) and one weak base (terbuthylazine)] on both fresh and field-aged BC as well as on a soil amended with these biochars. The aging process was performed by burying the biochar at 1 ...
DOI:
10.1016/j.geoderma.2018.09.033

3. Modification and evaluation of Green–Ampt model: Dynamic capillary pressure and broken-line wetting profile

Author:
Zhang, Qi-yong; Chen, Wen-wu; Zhang, Ying-min
Source:
Journal of hydrology 2019
ISSN:
0022-1694
Subject:
silt loam soils,   etc   ; equations; hydraulic conductivity; isotropy; models; sand; sandy loam soils; silty clay loam soils; water content;     Show all 9 Subjects
Abstract:
... The Green–Ampt (GA) model, which assumes a rectangular saturated piston flow and homogeneous isotropic soil with uniform initial water content, is one of the most widely used models for describing infiltration processes. However, these assumptions severely limit the applications of the model. Thus, a modified GA model has long been a topic of interest. This study mainly investigates the effects of ...
DOI:
10.1016/j.jhydrol.2019.06.008

4. Ex situ soil washing of highly contaminated silt loam soil using core-crosslinked amphiphilic polymer nanoparticles

Author:
Kim, Nahae; Kwon, Kihyun; Park, Joonseok; Kim, Juyoung; Choi, Jae-Woo
Source:
Chemosphere 2019 v.224 pp. 212-219
ISSN:
0045-6535
Subject:
silt loam soils,   etc   ; aqueous solutions; crosslinking; dispersions; hydrophobicity; nanoparticles; nonionic surfactants; octoxynol; petroleum; polluted soils; soil sampling; soil washing; washing;     Show all 13 Subjects
Abstract:
... Non-ionic surfactants (Triton X-100 and Brij 30) and core-crosslinked amphiphilic polymer (CCAP) nanoparticles were used as extractants in the ex situ soil washing of silt loam soil contaminated with large quantities of petroleum oil, and their soil-washing performances were compared. Following washing with the surfactants, highly turbid aqueous solutions containing large numbers of soil and petro ...
DOI:
10.1016/j.chemosphere.2019.02.144

5. Effect of rainfall intensity and slope on sediment particle size distribution during erosion using partial eta squared

Author:
Kiani-Harchegani, Mahboobeh; Sadeghi, Seyed Hamidreza; Singh, Vijay P.; Asadi, Hossein; Abedi, Mehdi
Source:
Catena 2019 v.176 pp. 65-72
ISSN:
0341-8162
Subject:
silt loam soils,   etc   ; clay fraction; particle size; particle size distribution; rain intensity; runoff; sediments; soil erosion; topographic slope;     Show all 9 Subjects
Abstract:
... Assessing impacts of different factors on soil erosion is crucial for developing management of watershed resources. The present study aimed at determining the effect of rainfall intensity (RI) and slope steepness (SS) on sediments subjected to raindrop detachment (RD), transport by raindrop splash (ST), raindrop-induced flow transport (RIFT) and transport by flow (FT), using partial eta squared (ɳ ...
DOI:
10.1016/j.catena.2019.01.006

6. Dynamics of pore functions and gas transport parameters in artificially ameliorated soils due to static and cyclic loading

Author:
Zhai, Xiafei; Horn, Rainer
Source:
Geoderma 2019 v.337 pp. 300-310
ISSN:
0016-7061
Subject:
silt loam soils,   etc   ; aeration; air; clay loam soils; diffusivity; permeability; porosity; sand; soil compaction; soil physical properties; soil quality;     Show all 11 Subjects
Abstract:
... Soil compaction is one of the main threats to sustain soil quality in modern agriculture. To improve our understanding concerning the interaction between soil physical properties and stress-strain on pore functions and soil aeration, measurements were performed with three different textures (sand, silt loam, clay loam), two matric potentials (−60 and −300 hPa), three compaction levels (50, 100 and ...
DOI:
10.1016/j.geoderma.2018.09.039

7. Influence of Freeze-Thaw Cycle on Silt Loam Soil in Sagebrush Steppe of Northeastern Oregon

Author:
Larson, L.L.; Kiemnec, G.L.; Johnson, D.E.
Source:
Rangeland ecology & management 2019 v.72 no.1 pp. 69-72
ISSN:
1550-7424
Subject:
silt loam soils,   etc   ; Artemisia; field capacity; freeze-thaw cycles; freezing; soil water; steppes; temperature; water content; Oregon;     Show all 10 Subjects
Abstract:
... Soil freeze-thaw cycles can result in soil surface crusting, pedestaling, and movement. This study was undertaken to quantify the amount of heaving and soil moisture migration in a silt loam soil from the sagebrush steppe. Soil columns containing silt loam soil with moisture treatments of 26%, 34%, 42%, or 50% water content and initial temperatures of 9o C or 20o C were exposed to −7o C for 18 h, ...
DOI:
10.1016/j.rama.2018.07.013

8. Assessment and comparison of PHCs removal from three types of soils (sand, silt loam and clay) using supercritical fluid extraction

Author:
Meskar, Mahmoud; Sartaj, Majid; Infante Sedano, Julio Angel
Source:
Environmental technology 2019 v.40 no.23 pp. 3040-3053
ISSN:
1479-487X
Subject:
silt loam soils,   etc   ; clay; clay fraction; diesel fuel; environmental technology; hydrocarbons; particle size; petroleum; polluted soils; sand; soil carbon; soil texture; supercritical fluid extraction; temperature;     Show all 14 Subjects
Abstract:
... Supercritical fluid extraction (SFE) was applied to investigate the removal of petroleum hydrocarbons (PHCs) from contaminated soils. Per an initial set of tests for different extraction modes and time durations, the combination of 10 min static mode followed by 10 min dynamic mode, repeated for 3 cycles for a total time of 60 min resulted in the highest PHCs removal percentages. SFE experiments w ...
DOI:
10.1080/09593330.2018.1466917

9. Improved drainage relationships for characterizing the agronomic and environmental performance of field crop production

Author:
Reynolds, W.D.
Source:
Geoderma 2019 v.352 pp. 126-137
ISSN:
0016-7061
Subject:
silt loam soils,   etc   ; agri-environmental policy; air; capillarity; crop production; drainage; environmental performance; equations; field crops; leaching; mathematical models; nutrients; rhizosphere; sandy soils; soil water; soil water content;     Show all 16 Subjects
Abstract:
... Simple algebraic drainage equations produce useably accurate depth and time distributions for unsaturated soil water content and drainage flux, but they systematically underestimate matric head. The primary objective of this study was to improve the matric head estimate, and thereby increase the value of algebraic drainage equations in agri-environmental applications. A secondary objective was to ...
DOI:
10.1016/j.geoderma.2019.05.019

10. Predicting nitrogen supply from dairy effluent applied to contrasting soil types

Author:
Norris, Matthew; Johnstone, Paul R.; Dexter, Moira M.; Selbie, Diana R.; Houlbrooke, David J.; Sharp, Joanna M.; Hedderley, Duncan I.
Source:
New Zealand journal of agricultural research 2019 v.62 no.4 pp. 438-456
ISSN:
1175-8775
Subject:
silt loam soils,   etc   ; carbon nitrogen ratio; dairy cattle; effluents; experimental design; field capacity; mineralization; nitrogen; prediction; sandy loam soils; slurries; water solubility;     Show all 12 Subjects
Abstract:
... A closed incubation assay was conducted to identify attributes that can be used to predict nitrogen (N) supply from dairy cattle effluents applied to contrasting soil types. The experimental design included six slurry (DM 7.9–13%) and six solid (DM 15.9–42.5%) effluents applied to a Horotiu sandy loam or a Templeton silt loam with treatments incubated at 70% of field capacity at 20°C for 2, 5, 14, ...
DOI:
10.1080/00288233.2018.1508478

11. Applicability of biochar for limiting interrill erosion and organic carbon export of sloping cropland in a semi-arid area of China

Author:
Peng, Xiaoyu; Tong, Xiaogang; Hao, Liting; Wu, Faqi
Source:
Agriculture, ecosystems & environment 2019 v.280 pp. 68-76
ISSN:
0167-8809
Subject:
silt loam soils,   etc   ; aggregate stability; biochar; cropland; interrill erosion; rain intensity; rainfall simulation; runoff; sediments; semiarid zones; soil aggregates; soil amendments; soil texture; total organic carbon; wheat; China;     Show all 16 Subjects
Abstract:
... As a recalcitrant carbon source, the residence time of biochar is estimated to be hundreds to thousands of years. Since biochar is now being applied as a soil amendment in many areas of the world, the effects of long-term stationary biochar and its applicability for limiting soil erosion and nutrient export must be considered. To this end, this study investigated the effects of biochar on interril ...
DOI:
10.1016/j.agee.2019.04.021

12. Above- and belowground growth response of Picea abies seedlings exposed to varying levels of soil relative bulk density

Author:
Labelle, Eric R.; Kammermeier, Maximilian
Source:
European journal of forest research 2019 v.138 no.4 pp. 705-722
ISSN:
1612-4669
Subject:
silt loam soils,   etc   ; Picea abies; belowground biomass; bulk density; computer software; equipment; forest stands; forests; mechanization; monitoring; roots; seedlings; seeds; shoots; soil density; trees; Germany;     Show all 17 Subjects
Abstract:
... During mechanized forest operations, machines with high wheel loads are operated directly on the soil and can pose serious concerns for the integrity and quality of soil properties. Simply relying on absolute soil density (g cm⁻³ or t m⁻³) as a measure of qualitative assessment remains site specific. Instead of absolute soil density, the aim of this study was to assess and quantify the above- and ...
DOI:
10.1007/s10342-019-01201-6

13. Differences in preferential flow with antecedent moisture conditions and soil texture: Implications for subsurface P transport

Author:
Grant, Kirsten N.; Macrae, Merrin L.; Ali, Genevieve A.
Source:
Hydrological processes 2019 v.33 no.15 pp. 2068-2079
ISSN:
0885-6087
Subject:
silt loam soils,   etc   ; antecedent moisture; clay; clay soils; drought; dyes; fertilizers; hydrology; macropores; phosphorus; photographs; preferential flow; rain; rainfall simulation; risk; silt; soil profiles; soil texture; staining;     Show all 19 Subjects
Abstract:
... Preferential flowpaths transport phosphorus (P) to agricultural tile drains. However, if and to what extent this may vary with soil texture, moisture conditions, and P placement is poorly understood. This study investigated (a) interactions between soil texture, antecedent moisture conditions, and the relative contributions of matrix and preferential flow and (b) associated P distributions through ...
DOI:
10.1002/hyp.13454

14. Bacteria-assisted removal of fluoroquinolones from wheat rhizospheres in an agricultural soil

Author:
Riaz, Luqman; Mahmood, Tariq; Yang, Qingxiang; Coyne, M.S.; D'Angelo, E.
Source:
Chemosphere 2019 v.226 pp. 8-16
ISSN:
0045-6535
Subject:
silt loam soils,   etc   ; agricultural soils; bacteria; bioavailability; biodegradation; ciprofloxacin; crops; detection limit; enrofloxacin; greenhouses; inoculum; levofloxacin; polluted soils; public health; roots; shoots; soil ecology; wheat;     Show all 18 Subjects
Abstract:
... Extensive fluoroquinolone antibiotics use results in their widespread occurrence in various environments including soil, which threatens the soil ecology and public health. The fate of fluoroquinolones in agricultural soil and the efficacy of enhanced degradation in the presence of an agricultural crops and antibiotic degrading bacteria could be better understood. The current study examined ciprof ...
DOI:
10.1016/j.chemosphere.2019.03.081

15. Plant and soil effects on denitrification potential in agricultural soils

Author:
Malique, François; Ke, Piaopiao; Boettcher, Jürgen; Dannenmann, Michael; Butterbach-Bahl, Klaus
Source:
Plant and soil 2019 v.439 no.1-2 pp. 459-474
ISSN:
0032-079X
Subject:
silt loam soils,   etc   ; Lolium; agricultural soils; barley; clay loam soils; crops; denitrification; enzyme activity; nitrogen; nitrogen cycle; rhizosphere; soil properties; soil water; texture; water content; wheat;     Show all 16 Subjects
Abstract:
... BACKGROUND AND AIMS: Microbial denitrification is the primary driver of nitrogen losses from the plant-soil system and the key process for the closure of the global N cycle. All major controls of denitrification might be directly or indirectly affected by plants. However, there is a lack of research of the direct effects of plants on soil denitrification and how this effect might be mediated by so ...
DOI:
10.1007/s11104-019-04038-5

16. Reconfiguration of macropore networks in a silty loam soil following biochar addition identified by X‐ray microtomography and network analyses

Author:
Yu, Xiuling; Lu, Shenggao
Source:
European journal of soil science 2019 v.70 no.3 pp. 591-603
ISSN:
1351-0754
Subject:
silt loam soils,   etc   ; Haplustalfs; air; bamboos; biochar; corn straw; macropores; micro-computed tomography; models; nutrient transport; paddy soils; porosity; rice straw; topology;     Show all 14 Subjects
Abstract:
... Biochars are widely applied to improve soil pore structures. However, the quantitative effects of biochars on soil macropore networks still remain unclear. In this study, the effects and possible mechanism of biochar application on soil macropore networks were investigated quantitatively by industrial X‐ray microtomography (CT), a pore network model and network analyses. Soil cores of 5 cm in diam ...
DOI:
10.1111/ejss.12773

17. Does Particulate Organic Matter Fraction Meet the Criteria for a Model Soil Organic Matter Pool?

Author:
CURTIN, Denis; BEARE, Michael H.; QIU, Weiwen; SHARP, Joanna
Source:
Pedosphere 2019 v.29 no.2 pp. 195-203
ISSN:
1002-0160
Subject:
silt loam soils,   etc   ; biodegradability; fractionation; land use; models; organomineral complexes; particle size; particulate organic matter; pastures; sand; sand fraction; soil carbon; soil organic matter; ultrasonics; New Zealand;     Show all 15 Subjects
Abstract:
... There is a well-recognized need for improved fractionation methods to partition soil organic matter into functional pools. Physical separation based on particle size is widely used, yielding particulate organic matter (POM, i.e., free or “uncomplexed” organic matter > 50 μm) as the most labile fraction. To evaluate whether POM meets criteria for an ideal model pool, we examined whether it is: 1) u ...
DOI:
10.1016/S1002-0160(18)60049-9

18. Effect of rock fragment content on erosion processes of disturbed soil accumulation under field scouring conditions

Author:
Niu, Yaobin; Gao, Zhaoliang; Li, Yonghong; Luo, Ke
Source:
Journal of soils and sediments 2019 v.19 no.4 pp. 1708-1723
ISSN:
1439-0108
Subject:
silt loam soils,   etc   ; disturbed soils; erodibility; kinetic energy; laminar flow; models; quarries; runoff; sediments; shear stress; streams; tap water; vegetation cover; water conservation; water erosion; China;     Show all 16 Subjects
Abstract:
... PURPOSE: Soil and water erosion from high rock fragment content disturbed soil accumulation severely threatens ecological security. Evaluation of the quantitative influence of rock fragment content on soil erosion processes was the basic research for soil and water conservation. MATERIALS AND METHODS: Field simulation scouring experiments were conducted on the disturbed soil accumulation experimen ...
DOI:
10.1007/s11368-018-2200-3

19. Hydraulic conductivity and pore connectivity. Effects of conventional and no-till systems determined using a simple laboratory device

Author:
Soracco, C. Germán; Villarreal, Rafael; Melani, Esteban M.; Oderiz, Juan Agustín; Salazar, María Paz; Otero, María Florencia; Irizar, Alicia B.; Lozano, Luis Alberto
Source:
Geoderma 2019 v.337 pp. 1236-1244
ISSN:
0016-7061
Subject:
silt loam soils,   etc   ; analytical methods; conventional tillage; fine-textured soils; hydraulic conductivity; hydrology; infiltrometers; long term experiments; no-tillage; sandy loam soils; soil pore system; Pampas region;     Show all 12 Subjects
Abstract:
... Soil hydraulic conductivity is a property that describes how easily water can move through a porous space and its determination is important because it controls many soil hydrological processes. The objectives of this work were: i - to assess the suitability of lab tension mini-infiltrometry to measure hydraulic conductivity, by comparing with field tension disc infiltrometer data; and ii - to ass ...
DOI:
10.1016/j.geoderma.2018.10.045

20. Relating soil C and organic matter fractions to soil structural stability

Author:
Jensen, Johannes L.; Schjønning, Per; Watts, Christopher W.; Christensen, Bent T.; Peltre, Clément; Munkholm, Lars J.
Source:
Geoderma 2019 v.337 pp. 834-843
ISSN:
0016-7061
Subject:
silt loam soils,   etc   ; clay; clay fraction; crop rotation; dispersibility; fallow; grasses; long term experiments; minerals; photoacoustic spectroscopy; soil organic carbon; spring; stabilizers; tillage;     Show all 14 Subjects
Abstract:
... Soil organic matter (SOM) is important for maintaining soil structural stability (SSS). This study quantified the influence of soil organic carbon (SOC) and different organic matter components on various SSS measures. We used a silt loam soil with a wide range of SOC (8.0–42.7 g kg−1 minerals) sampled in spring 2015 from the Highfield Ley-Arable Long-Term Experiment at Rothamsted Research. Four tr ...
DOI:
10.1016/j.geoderma.2018.10.034