-- Name -- FAO horizon notation type -- Definition -- A classification of a horizon according to the Horizon classification system specified in Guidelines for soil description, 4th edition, Food and Agriculture Organization of the United Nations, Rome, 2006. -- Description -- A code system that denotes horizons in which the same dominant soil forming processes has been active similarly. This code summarizes many observations of the soil description and gives an impression about the genetic processes that have formed the soil under observation. NOTE The horizon notation according to FAO (2006) is a combination of several symbols: · A number that gives information about discontinuities, i.e. the number of the material in which the soil has formed, counted up from the soil surface, but not for the first material. · One or two capital letters that designate the type of master horizon (or transitional horizon), possibly separated by a slash · Lower case letters that designate subordinate characteristics of the horizon. · A number that designates horizontal subdivisions of otherwise similarly denoted horizon parts · A prime that enables to distinguish two horizons that have the same naming, but formed in different cycles of pedogenesis. EXAMPLE 2B' tg1 SOURCE 1 Page 67 - 77 of the Guidelines for soil description, 4th edition, Food and Agriculture Organization of the United Nations, Rome, 2006. (ISBN 92-5-105521-1)
-- Name -- range type -- Definition -- A range value defined by an upper limit and a lower limit.
-- Name -- WRB soil name type -- Definition -- an identification of the soil profile according to the profile to according to “World Reference Base for Soil Resources 2006, first update 2007”, World Soil Resources Reports No. 103. FAO, Rome. -- Description -- NOTE The structure of the WRBSoilNameType was based on the World reference base for soil resources 2006, first update 2007, World Soil Resources Reports No. 103, Food and Agriculture Organization of the United Nations, Rome, 2007. EXAMPLE Lixic Vertic Ferralsol (Ferric, Rhodic), WRB 2006, update 2007.
-- Name -- soil theme descriptive parameter type -- Definition -- data type providing a descriptive property for the soil-related property (soil theme) that is represented by its associated SoilThemeCoverage. -- Description -- this datatype exists of a name and if needed a unit of measurement. EXAMPLE confidence level for each value in the SoilThemeCoverage (pH in the topsoil)
-- Name -- particle size fraction type -- Definition -- share of the soil that is composed of mineral soil particles of the size within the size range specified. -- Description -- Mineral part of the soil, fractioned on the basis of size (diameter), limits of the particles. It is the fine earth fraction. That is, the portion of the soil that passes through a 2 mm diameter sieve opening. The grain (or particle) size distribution characterizes the soil mineral material, based on the share of each equivalent diameter class of the individual particles. SOURCE1 NRCS Natural Resources Conservation Service, Soil survey laboratory information manual, Soil survey investigation report n.45 version 1.0 May 1995 pag. 11 SOURCE2 GLOSSARY OF SOIL SCIENCE TERMS
-- Name -- other soil name type -- Definition -- an identification of the soil profile according to a specific classification scheme. -- Description -- EXAMPLE Fluventic Haploxerept, according to Soil Taxonomy (USDA 2006).
-- Name -- other horizon notation type -- Definition -- classification of a horizon according to a specific classification system. -- Description -- A code system denoting horizons in which the same dominant soil forming processes have been active in the same way. This code summarizes many observations of the soil description and gives an impression about the genetic processes that have formed the soil under observation.
-- Name -- WRB qualifier group type -- Definition -- A data type to define the group of a qualifier and its possible specifier(s), its place and position with regard to the World Reference Base (WRB) Reference Soil Group (RSG) it belongs to according to World reference base for soil resources 2006, first update 2007, World Soil Resources Reports No. 103, Food and Agriculture Organization of the United Nations, Rome, 2007.
-- Name -- soil theme parameter type -- Definition -- A soil-related property (soil theme) that is represented by this coverage. It is composed of a parameter name coming from a codelist SoilDerivedObjectParameterNameValue and a Unit of Measure used for expressing that parameter. -- Description -- EXAMPLE Land irrigation suitability, pH in the topsoil, etc