secondary soil

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• Soil map — is a map showing distribution of soil types and/or soil properties (soil pH, textures, organic matter, depths of horizons etc.) in the area of interest. It is typically the end result of a soil survey inventory, i.e. soil survey. Soil maps are… …   Wikipedia

• Secondary forest — Secondary, or second growth, forest is a forest or woodland area which has re grown after a major disturbance such as fire, insect infestation, timber harvest or wind throw, until a long enough period has passed so that the effects of the… …   Wikipedia

• Secondary succession — is one of the two types of ecological succession of plant life. As opposed to primary succession, secondary succession is a process started by an event [cite web url=http://www.google.com/search?hl=en client=firefox a rls=com.mandriva:en… …   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

• Soil contamination — Excavation showing soil contamination at a disused gasworks. Soil contamination or soil pollution is caused by the presence of xenobiotic (human made) chemicals or other alteration in the natural soil environment. This type of contamination… …   Wikipedia

• soil — soil1 soilless, adj. /soyl/, n. 1. the portion of the earth s surface consisting of disintegrated rock and humus. 2. a particular kind of earth: sandy soil. 3. the ground as producing vegetation or as cultivated for its crops: fertile soil. 4. a… …   Universalium

• Soil test — In agriculture, a soil test is the analysis of a soil sample to determine nutrient content, composition and other characteristics, including contaminants. Tests are usually performed to measure fertility and indicate deficiencies that need to be… …   Wikipedia

• Soil food web — The soil food web is the community of organisms living all or part of their lives in the soil. It describes a complex living system in the soil and how it interacts with the environment, plants, and animals. Introduction Food webs describe the… …   Wikipedia

• soil organism — ▪ biology  any organism inhabiting the soil during part or all of its life. Soil organisms, which range in size from microscopic cells that digest decaying organic material to small mammals that live primarily on other soil organisms, play an… …   Universalium

• secondary — /ˈsɛkəndri / (say sekuhndree), Originally US / dɛri/ (say deree) adjective 1. next after the first in order, place, time, importance, etc. 2. belonging or relating to a second order, division, stage, period, rank, or the like. 3. derived or… …  

• Secondary roots — Root Root, n. [Icel. r[=o]t (for vr[=o]t); akin to E. wort, and perhaps to root to turn up the earth. See {Wort}.] 1. (Bot.) (a) The underground portion of a plant, whether a true root or a tuber, a bulb or rootstock, as in the potato, the onion …   The Collaborative International Dictionary of English