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total cation exchange capacity

См. также в других словарях:

  • cation exchange capacity —    The sum total of exchangeable cations that a porous medium can absorb. Expressed in moles of ion charge per kilogram of soil (or of other exchanges such as clay) [22] …   Lexicon of Cave and Karst Terminology

  • exchange capacity —    1. The amount of exchangeable ions measured in moles of ion change per kilogram of solid material at a given pH. Synonymous with ion exchange capacity [22].    2. The total ionic charge of the adsorption complex active in the adsorption of… …   Lexicon of Cave and Karst Terminology

  • 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

  • Biochar — is a charcoal produced from biomass that can store carbon. It is of increasing interest because of concerns about global warming caused by emissions of CO2 and other greenhouse gases. In some cases, the term is used specifically to mean biomass… …   Wikipedia

  • Alkali soils — Alkali, or alkaline, soils are clay soils with a relatively high exchangeable sodium percentage, a relative high pH (> 9), a poor soil structure and a low infiltration capacity. Often they have a hard calcareous layer at 0.5 to 1 m. depth (in… …   Wikipedia

  • John D. Hamaker — (1914–1994), was an American mechanical engineer, ecologist, agronomist and science writer in the fields of soil remineralization, rock dusting, mineral cycles, climate cycles and glaciology. Contents 1 Biography 2 Discoveries inventions 3… …   Wikipedia

  • Shifting cultivation — For methods, see slash and burn Shifting cultivation is an agricultural system in which plots of land are cultivated temporarily, then abandoned. This system often involves clearing of a piece of land followed by several years of wood harvesting… …   Wikipedia

  • Claveria, Misamis Oriental — For other places with the same name, see Claveria (disambiguation). Municipality of Claveria Lungsod sa Claveria Seal …   Wikipedia

  • Western Africa — ▪ region, Africa Introduction       region lying south of the Sahara and east and north of the Atlantic Ocean. It is latitudinally divided into two parallel belts of land: the western portion of the Sudan, a geographic area that stretches across… …   Universalium

  • Hydroponics — (from the Greek words hydro (water) and ponos (labour) is a method of growing plants using mineral nutrient solutions, without soil. Terrestrial plants may be grown with their roots in the mineral nutrient solution only or in an inert medium,… …   Wikipedia

  • Effective porosity — The term effective porosity lacks a single or straightforward definition. Even some of the terms used in its mathematical description (“Vcl” and “Vsh”) have multiple definitions. However, it is most commonly considered to represent the porosity… …   Wikipedia

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