Examlex
Memory is a distinguishing factor in old age and research suggests that intentional memory declines and incidental memory does not in old age.
Topsoil
The upper, outermost layer of soil, usually the top 2-8 inches, that has the highest concentration of organic matter and microorganisms.
Humus
The organic component of soil, formed by the decomposition of leaves and other plant material by soil microorganisms.
Leaching
The process where water carries soluble substances or small particles through the soil or other permeable material.
Dissolving
The process by which a solid, liquid, or gas forms a solution in a solvent, becoming evenly dispersed at the molecular or ionic level.
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