Soil classification deals with the systematic categorization of soils based on distinguishing characteristics as well as criteria that dictate choices...

Unified Soil Classification System (USCS) is a soil classification system used in engineering and geology to describe the texture and grain size of a soil. The...

The AASHTO Soil Classification System was developed by the American Association of State Highway and Transportation Officials, and is used as a guide...

supra-national classification, which offers useful generalizations about pedogenesis in relation to the interactions between the main soil-forming factors...

and the National Cooperative Soil Survey provides an elaborate classification of soil types according to several parameters (most commonly their properties)...

The Australian Soil Classification is the classification system currently used to describe and classify soils in Australia. It is a general-purpose, hierarchical...

Soil texture is a classification instrument used both in the field and laboratory to determine soil classes based on their physical texture. Soil texture...

plants and soil organisms. Some scientific definitions distinguish dirt from soil by restricting the former term specifically to displaced soil. Soil consists...

soil classification, the science that deals with the systematic categorization of soils. Every soil of the world belongs to a certain soil type. Soil...

Soil science is the study of soil as a natural resource on the surface of the Earth including soil formation, classification and mapping; physical, chemical...

The Polish Soil Classification (Polish: Systematyka gleb Polski) is a soil classification system used to describe, classify and organize the knowledge...

symbols, the systems cannot be mixed. In most soil classification systems, horizons are used to define soil types. The German system uses entire horizon...

if lime and fertilizer are used. The E horizon (or Ae in Canadian soil classification system), which is usually 4 to 8 centimetres (1.6 to 3.1 in) thick...

Soil mechanics is a branch of soil physics and applied mechanics that describes the behavior of soils. It differs from fluid mechanics and solid mechanics...

study of soil morphology and soil classification. The study of pedogenesis is important to understanding soil distribution patterns in current (soil geography)...

In soil science, soil gradation is a classification of a coarse-grained soil that ranks the soil based on the different particle sizes contained in the...

The Canadian System of Soil Classification is more closely related to the American system than any other, but they differ in several ways. The Canadian...

Chernozemic soils are a soil type in the Canadian system of soil classification and the World Reference Base for Soil Resources (WRB). Chernozemic soil type...

Reference Base for Soil Resources (WRB) is an international soil classification system for naming soils and creating legends for soil maps. The currently...

develop systems of soil classification, soil maps, and theories for characterizing temporal and spatial interrelations among soils . There are a few noteworthy...

group of soils, comprising one of the 32 Reference Soil Groups in the international system of soil classification, the World Reference Base for Soil Resources...

are exceedingly shallow soils. They are often referred to as skeletal soils or, in the United Nations FAO soil classification, as lithosols. The basic...

Soil survey, or soil mapping, is the process of classifying soil types and other soil properties in a given area and geo-encoding such information. Soil...

Resources (WRB). It is also defined in many other soil classification systems. In the Australian Soil Classification it is called vertosol. The natural vegetation...

of soil are typically performed in the field on a soil profile containing multiple horizons. Along with soil formation and soil classification, soil morphology...

cm of the soil surface. Muck soils fall under the Organic Order in the Canadian system of soil classification. Muck soils are organic soils, with at minimum...

contents of a fine-grained soil: its shrinkage limit, plastic limit, and liquid limit. Depending on its water content, soil may appear in one of four states:...

1938 soil taxonomy divided soils into three orders dependent on dominant soil forming factors. Intrazonal soils have more or less well-defined soil profile...

of different soils in 1717, an idea later known as the soil's angle of repose. Around the same time, a rudimentary soil classification system was also...

Mediterranean soil, also known as terra rossa (Italian for "red soil") is a soil classification that has been formally superseded by the formal classifications of...