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Soil, also commonly referred to as earth, is a mixture of organic matter, minerals, gases, ... and established the concepts for soil classifications.
A soil scientist examining horizons within a soil profile. Soil science is the study of soil as a natural resource on the surface of the Earth including soil formation, classification and mapping; physical, chemical, biological, and fertility properties of soils; and these properties in relation to the use and management of soils.
Soil bulk density, when determined at standardized moisture conditions, is an estimate of soil compaction. [3] Soil porosity consists of the void part of the soil volume and is occupied by gases or water. Soil consistency is the ability of soil materials to stick together. Soil temperature and colour are self-defining.
His soil classification of 1935 depends heavily on the concept of a "normal soil", the product of equilibrium on a landscape where downward erosion keeps pace with soil formation. Clarification and broadening of the concept of a soil science also grew out of the increasing emphasis on detailed soil mapping.
Soil scientists use the capital letters O, A, B, C, and E to identify the master horizons, and lowercase letters for distinctions of these horizons. Most soils have three major horizons—the surface horizon (A), the subsoil (B), and the substratum (C). Some soils have an organic horizon (O) on the surface, but this horizon can also be buried.
Soil mechanics is a branch of soil physics and applied mechanics that describes the behavior of soils. ... Because of its origins in the steady state concept, DSSM is ...
Soil formation, also known as pedogenesis, is the process of soil genesis as regulated by the effects of place, environment, and history.
Soil classification is a dynamic subject, from the structure of the system, to the definitions of classes, to the application in the field. Soil classification can be approached from the perspective of soil as a material and soil as a resource.