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soil base

См. также в других словарях:

  • Base-poor — in ecology refers to water or soil which has relatively low levels of alkaline chemical bases, such as calcium or magnesium ions. Such environments are usually dominated by organic acids, and so are acidic and are occupied by species tolerant of… …   Wikipedia

  • Base-rich — in ecology refers to water or soil which has relatively high levels of chemical bases, such as calcium or magnesium ions. These chemicals are alkalis, and so such environments are neutral or alkaline, and are occupied by species tolerant of these …   Wikipedia

  • Soil horizon — Soil samples illustrating horizons (subsoil on right) A soil horizon is a specific layer in the land area that is parallel to the soil surface and possesses physical characteristics which differ from the layers above and beneath …   Wikipedia

  • Soil cement — is a construction material , a mix of pulverized natural soil with small amount of portland cement and water, usually processed in a tumble, compacted to high density. Hard, semi rigid durable material is formed by hydration of the cement… …   Wikipedia

  • Soil classification — deals with the systematic categorization of soils based on distinguishing characteristics as well as criteria that dictate choices in use. Overview Soil classification is a dynamic subject, from the structure of the system itself, to the… …   Wikipedia

  • Soil acidification — is the buildup of hydrogen cations, also called protons, in the soil. This happens when a proton donor is added to the soil. The donor can be an acid, such as nitric acid and sulfuric acid (these acids are common components of acid rain). It can… …   Wikipedia

  • Soil pH — is the pH of soil water. It is based on the measurement of pH, which depends on the activity of hydrogen ions (H+) in a solution.There are many different methods to collect soil water, all which influence the measured soil pH in one way or… …   Wikipedia

  • 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… …   Wikipedia

  • Soil morphology — is the field observable attributes of the soil within the various soil horizons and the description of the kind and arrangement of the horizons. [cite book | last = Buol | first = Stanley W. | authorlink = | coauthors = Southard, Randal J.,… …   Wikipedia

  • Base course — in pavements refers to the sub layer material of an asphalt roadway and is placed directly on top of the undisturbed soil so as to provide a foundation to support the top layer(s) of the pavement. Generally consisting of a specific type of… …   Wikipedia

  • Soil — For other uses, see Soil (disambiguation). A represents soil; B represents laterite, a regolith; C represents saprolite, a less weathered regolith; the bottommost layer represents bedrock …   Wikipedia

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