108 Terms
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Soil science
That science dealing with soils 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.
Industry: Earth science
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Soil science
Imogolite
Earth science; Soil science
A poorly crystalline aluminosilicate mineral with an ideal composition SiO2 Al2O3 2. 5H2( + ). It appears as threads consisting of assemblies of a tube unit with inner and outer diameters of 1. 0 ...
Clod
Earth science; Soil science
A compact, coherent mass of soil varying in size, usually produced by plowing, digging, etc. , especially when these operations are performed on soils that are either too wet or too dry and usually ...
Salic horizon
Earth science; Soil science
A mineral soil horizon of enrichment with secondary salts more soluble in cold water than gypsum. A salic horizon is 15 cm or more in thickness, contains at least 20 g kg-1salt, and the product of ...
Kaolinite
Earth science; Soil science
A clay mineral of the kaolin subgroup. It has a 1:1 layer structure composed of shared sheets of Si-O tetrahedrons and Al-(O,OH) octahedrons with very little isomorphous substitution.
Application rate
Earth science; Soil science
(i) (irrigation) Rate at which water is applied per unit area; usually in mm per hour, (ii) weight or volume of a fertilizer, soil amendment, or pesticide applied per unit area.
Muscovite
Earth science; Soil science
A clear, dioctahedral layer silicate of the mica group with Al3+ in the octahedral layer and Si and Al in a ratio of 3:1 in the tetrahedral layer.
Drag
Earth science; Soil science
(i) The force retarding the flow of a fluid over the surface of a solid body. (ii) See tillage, drag.
