Soil survey is the process of determining the soil types or other properties of the soil cover over a landscape, and mapping them for others to understand and use. It is a branch of soil science, and draws heavily from geomorphology, theories of soil formation (pedology), physical geography, and analysis of vegetation and land-use patterns. Primary data for the soil survey are acquired by field sampling, supported by remote sensing (principally vertical airphotos). In agriculture, soil type usually refers to the different sizes of mineral particles in a particular sample. ... Soil science deals with 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 per se; and these properties in relation to the use and management of soils. ... Geomorphology is the study of present-day landforms, including their classification, description, nature, origin, development, and relationships to underlying structures, as well as the history of geologic changes as recorded by these surface features. ... Pedology has the following meanings Pedology (soil study) Pedology (children study) This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...
The FAO developed a supra-national classification, also called World Soil Classification, which offers useful generalizations about soils pedogenesis in relation to the interactions with the main soil-forming factors. ... Soil taxonomy provided by United States Department of Agriculture / Natural Resources Conservation Centre provides an elaborate classification of soil types according to several parameters and in several levels: Order, Suborder, Great Group, Subgroup, Family, and Series. ...
A Compendium of On-Line Soil Survey Information (http://www.itc.nl/~rossiter/research/rsrch_ss.html)
Soil samples from the surface down to bedrock were collected from the horizons and analyzed for bulk density, particle size distribution, moisture retention at 1/3 and 15 bar suctions, cation exchange capacity, and other chemical and physical properties, using standard procedures (SoilSurvey Staff 1984).
Reasonable objectives in soilsurveys are to: (i) minimize the variation in terms of significant soil properties within mapping units while maximizing the variation among mapping units, and (ii) effectively characterize the mapping units in terms of significant soil properties.
The soil auger cores a cylindrical section of the soil for soil identification, and a soil profile pit (approximately 1 cubic meter in volume) is dug for a detailed description.
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