Results 1 to 10 of about 389 (126)

Mechanical Soil Database—Part I: Impact of Bulk Density and Organic Matter on Precompression Stress and Consequences for Saturated Hydraulic Conductivity [PDF]

Frontiers in Environmental Science, 2022
The mechanical strength of agricultural soils depends on many soil properties and functions. The database, “soil strength and consequences for sustainable land use and soil management SOILMECHDAT-Kiel”, originates from the “Horn Research Group” includes ...
Richard Schroeder, Heiner Fleige, Carsten Hoffmann, Hans Joerg Vogel, Rainer Horn   +4 more
doaj   +4 more sources

Comparison of Methods for Determining Precompression Stress Based on Computational Simulation [PDF]

Revista Brasileira de Ciência do Solo, 2016
There are many methods for determining precompression stress (σp), whose value is affected by the slope of the soil compression curve. This study was designed to evaluate the hypothesis that for a certain compression curve all methods used to determine ...
Anderson Rodrigo da Silva, Renato Paiva de Lima   +1 more
doaj   +5 more sources

Estimation of precompression stress in an Ultisol cultivated with sugarcane [PDF]

Revista Brasileira de Engenharia Agrícola e Ambiental, 2019
Compressive soil properties are typically used for the understanding of compaction process. As an alternative to laboratory tests, pedo-transfer functions have been used to estimate the mechanical behaviour of soil as a function of soil physical ...
Pericles M. B. Mendes, Mário M. Rolim, Renato P. de Lima, Elvira M. R. Pedrosa, Uilka E. Tavares, Djalma E. Simões Neto   +5 more
doaj   +3 more sources

Spatial variability of precompression stress and volumetric water content of a red-yellow latosol (Oxisol)

Bioscience Journal, 2020
The intensive agricultural machinery traffic to which soils under coffee crops are exposed may cause significant changes in soil structure. The goals of this study were to: a) characterize the spatial variability of precompression stress (σp) and ...
Karina Marie Kamimura, Moacir de Souza Dias Júnior, Marcelo Silva de Oliveira, Gérson Rodrigues dos Santos, Paulo Tácito Gontijo Guimarães, Ayodele Ebenezer Ajayi   +5 more
doaj   +6 more sources

Precompression stress and compression index depend on the property used to represent the soil deformation in the compression curve [PDF]

Ciência Rural, 2016
: During linear deformation (h) in a soil sample, the variation of the void ratio with respect to deformation (dε/dh) and the respective variation of soil bulk density (dρ/dh) are identical only for a specific value of h. Consequently, if two compression
Paulo Ivonir Gubiani, Quirijn de Jong Van Lier, José Miguel Reichert, Rafael Ziani Goulart, Eracilda Fontanela   +4 more
doaj   +3 more sources

Calculation of the compression index and precompression stress from soil compression test data

Soil and Tillage Research, 2006
Abstract When compressing soil, there is a characteristic relationship between compressive stress and volume change that can be used to define important soil mechanical properties. Two defining features can be determined – the compression index (Cc – the modulus of the slope of the linear virgin compression curve) and the precompression stress (
W R Whalley, C W Watts, Paul D Hallett
exaly   +2 more sources

A Novel Method for Estimating Soil Precompression Stress from Uniaxial Confined Compression Tests

Soil Science Society of America Journal, 2017
Core Ideas A new numerical method could detect the point of maximum curvature in the stress–strain relationship.
Mathieu Lamandé, Per Schjønning, Rodrigo Labouriau   +2 more
exaly   +4 more sources

Damage evolution and constitutive model of limestone with horizontal fissure under the coupled effects of dry-wet cycling and precompression stress

International Journal of Mining Science and Technology
To reveal the influence of coupled effects of dry-wet cycling and precompression stress (CEDWCPS) on the damage evolution of limestone with horizontal fissure (LHF), a series of degradation and uniaxial compression tests were conducted, and a ...
Shunbo Zhang, Zhongping Yang, Yang Gao, Miao Liu, Shanmeng Hou   +4 more
doaj   +2 more sources

Current limitations and future research needs for predicting soil precompression stress: A synthesis of available data [PDF]

Soil and Tillage Research
Precompression stress, compression index, and swelling index are used for characterizing the compressive behavior of soils, and are essential soil properties for establishing decision support tools to reduce the risk of soil compaction. Because measurements are time-consuming, soil compressive properties are often derived through pedotransfer functions.
Thomas Keller, Loraine Ten Damme
exaly   +4 more sources

Soil Structure under Forest and Pasture Land-Uses Affecting Compressive Behavior and Air Permeability in a Subtropical Soil

Soil Systems, 2022
Machinery traffic and animal trampling can deform the soil and, consequently, impair soil pore functioning. This study aimed to evaluate how soil structure affects the compressibility, physical properties and air permeability of a Typic Paleudalf under ...
Luis Eduardo Akiyoshi Sanches Suzuki, Dalvan José Reinert, Deonir Secco, Paulo Torres Fenner, José Miguel Reichert   +4 more
doaj   +1 more source