Compaction, as a physical phenomenon, refers to the reduction of volume and increase in bulk density of a particulate or porous material under applied stress, typically due to mechanical loading, overburden pressure, or confining forces. It involves rearrangement of grains, expulsion of pore fluids or gases, and progressive reduction of porosity, often accompanied by deformation or crushing of particles at higher stresses. In geological and engineering contexts, compaction governs consolidation of sediments, evolution of mechanical and hydraulic properties (e.g., permeability), and stress–strain behavior, and is described by constitutive relationships linking effective stress, void ratio, and time-dependent creep or consolidation processes.
Soil is often perceived simply as "dirt," but in reality, it is a dynamic, living system that acts as Earth's natural sponge. Unfortunately, common agricultural practices—including deep plowing and the use of heavy machinery—can ...
Ecology
Mar 22, 2026
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Plowing, or tilling, is an age-old agricultural practice that readies the soil for planting by turning over the top layer to expose fresh earth. The method—intended to improve water and nutrient circulation—remains popular ...
Earth Sciences
Mar 19, 2026
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A French research team led by CNRS scientists has discovered that cells are able to retain a memory of a previous perturbation within the 3D structure of their genome, independently of their DNA sequence. When they are exposed ...
Cell & Microbiology
Feb 5, 2026
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Across the globe, soil compaction is becoming an ever more serious challenge. Heavy vehicles and machinery in modern agriculture compress the soil to such an extent that crops struggle to grow. In many regions, the problem ...
Cell & Microbiology
Nov 26, 2025
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A team of Johns Hopkins researchers is using an innovative X-ray imaging approach to reveal how compression reshapes the tiny spaces and stresses within sandstone—findings that could predict how this common rock used for ...
Earth Sciences
Aug 21, 2025
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Lately, there's been plenty of progress in 3D printing objects from the lunar regolith. We've reported on several projects that have attempted to do so, with varying degrees of success. However, most of them require some ...
Planetary Sciences
Apr 28, 2025
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61
When we take a stroll on the beach, we walk on the sand without any trouble. The sand appears solid and is difficult to compress. When we put the same sand grains in an hourglass, they behave very differently: the sand flows ...
General Physics
Apr 3, 2024
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