18 hasil untuk "Stephan Peth"
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Artikel Jurnal
Deformation patterns around growing roots using X-ray CT and digital volume correlation
As roots grow into soils, particles are displaced causing a process of soil restructuring in the vicinity of the roots. To date, a systematic approach to the investigation of factors influencing deformation patterns, including displacement and strain, has not been conducted. To achieve this…
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Artikel Jurnal
UV-ageing effects on polystyrene microplastics surface polarity and transport in soils
Microplastics (MP) in soils are considered an emerging environmental pollutant of global concern. The transport processes of MP in soils are poorly understood, which indicates a major knowledge gap regarding the environmental impact and behaviour of MP. Mobility and surface charge can be affected…
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Artikel Jurnal Teks lengkap
New Method for Hydraulic Characterization of Variably Saturated Zone in Peatland-Dominated Permafrost Mires
Modeling peatland hydraulic processes in cold regions requires defining near-surface hydraulic parameters. The current study aims to determine the soil freezing and water characteristic curve parameters for organic soils from peatland-dominated permafrost mires. The three research objectives are as…
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Artikel Jurnal
Investigation of Time Dependent Development of Soil Structure and Formation of Macropore Networks as Affected by Various Precrop Species
A well developed macropore network is advantageous in terms of transport processes regarding gas and water, as well as nutrient acquisition and root growth of crops. X-ray computed tomography provides a non-destructive method to visualize and quantify three-dimensional pore networks. Geometrical…
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Artikel Jurnal
Can we use X-ray CT to generate 3D penetration resistance data?
Noninvasive imaging of soils with X-ray CT has proven to be a useful method to assess soil structure from a pore space perspective. In contrast, methods like cone penetration tests reflect soil structure from the perspective of the soil matrix as assessed by its mechanical strength. Because both…
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Artikel Jurnal
Volume‐related quantification of organic carbon content and cation exchange capacity of macropore surfaces in Bt horizons
Abstract In structured soils, earthworm burrows, root channels, shrinkage cracks, and interaggregate spaces form complex macropore networks relevant for preferential transport, turnover processes, and root growth. Macropore walls are often coated with organomineral material, which determine…
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Artikel Jurnal
Modeling N fertilization impact on water cycle and water use efficiency of maize, finger‐millet, and lablab crops in South India
Abstract The understanding of the impact of nitrogen (N) fertilization on the field water cycle and corresponding water use efficiency (WUE) is very important for optimizing fertilization rates and conserving stressed water resources. We modeled soil moisture dynamics of maize (Zea mays L.), finger…
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Artikel Jurnal
Separation of Soil Macropore Types in Three-Dimensional X-Ray Computed Tomography Images Based on Pore Geometry Characteristics
In structured soils, earthworm burrows, root channels, shrinkage cracks, and interaggregate spaces form complex macropore networks. Depending on the type and morphological properties, each macropore surface type is coated with specific organo-mineral compounds, differently affecting sorption and…
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Artikel Jurnal
Rheological evaluation of soil microstructure stability during vegetation restoration on the Loess Plateau of China
Vegetation restoration is an effective measure to improve soil structure stability and thus decrease soil erosion. However, fewer studies have examined the effect of vegetation restoration on the mechanical stability of soil structure at the micro-scale level. In this study, we collected soil…
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Artikel Jurnal Teks lengkap
Impact of Ten Years Conservation Tillage in Organic Farming on Soil Physical Properties in a Loess Soil—Northern Hesse, Germany
In conservation agriculture, conservation tillage potentially influences the physical, chemical, and biological quality of the soil. Although the effects of conservation agriculture on the soil’s physical properties have been studied in conventional management systems, studies on organic farming…
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Artikel Jurnal
Characterizing uncertainty in process-based hydraulic modeling, exemplified in a semiarid Inner Mongolia steppe
Assessing root sources of three uncertainties – parameterization of soil hydraulic characteristics, boundary conditions, and estimation of source/sink terms – is a significant challenge in soil water transport modeling. This study aims to evaluate the uncertainty of three each widely-used parameter…
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Artikel Jurnal
Modeling the Impact of Biopores on Root Growth and Root Water Uptake
Roots are known to use biopores as preferential growth pathways to overcome hard soil layers and access subsoil water resources. This study evaluates root–biopore interactions at the root-system scale under different soil physical and environmental conditions using a mechanistic simulation model…
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Artikel Jurnal Teks lengkap
X-ray Microtomography for Investigating Pore Space and Its Relation to Water Retention and Conduction in Highly Weathered Soils
Soil structure controls soil hydraulic properties and is linked to soil aggregation processes. The aggregation processes of Oxisols are controlled mainly by clay mineralogy and biological activity. Computed microtomography (µCT) may be a tool for improving the knowledge of the hydraulic properties…
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Artikel Jurnal
Impact of nitrogen fertilization and cropping systems on aggregate-bound soil organic carbon fractions in Southern India
Abstract Understanding soil organic carbon fractions in southern India is crucial for enhancing soil health, crop productivity, and sustainable land management. It is majorly affected by cropping systems, nitrogen levels, irrigation management, etc. Therefore, the present study aimed to investigate…
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Artikel Jurnal
Microplastics recovery from soil by density separation: application at pristine and UV-aged particles differing in surface properties
Abstract Numerous methods are available for sampling, extracting, and detecting microplastics (MP; 0.001–5 mm) in soil. However, previous studies mostly focused on pristine MP and changing surface properties due to ageing (e.g. surface photooxidation) that will impact transport in soils are not…
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Artikel Jurnal
Soil organic carbon stocks after ten years of reduced tillage, compost and mulch application in temperate organic agriculture
Abstract Increasing soil organic carbon (SOC) aims to increase and maintain soil quality for sustainable crop production and to achieve carbon removal targets. Agronomic practices are therefore needed to reduce carbon losses and increase SOC stocks, especially in deep soil layers, which promote…
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Artikel Jurnal
Bridging Microbial Functional Traits With Localized Process Rates at Soil Interfaces
In this review, we introduce microbially-mediated soil processes, players, their functional traits, and their links to processes at biogeochemical interfaces [e.g., rhizosphere, detritusphere, (bio)-pores, and aggregate surfaces]. A conceptual view emphasizes the central role of the rhizosphere in…
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Artikel Jurnal
In Situ X-Ray Tomography Imaging of Soil Water and Cyanobacteria From Biological Soil Crusts Undergoing Desiccation
Biological soil crusts (biocrusts) are millimeter-sized microbial communities developing on the topsoils of arid lands that cover some 12% of Earth's continental area. Biocrusts consist of an assemblage of mineral soil particles consolidated into a crust by microbial organic polymeric substances…