Soil science

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

Flux density

Earth science; Soil science

The time rate of transport of a quantity (e.g., mass or volume of fluid, electromagnetic energy, number of particles, or energy) per unit area perpendicular to the direction of flow.

Volcanic ash

Earth science; Soil science

Unconsolidated, pyroclastic material less than 2 mm in all dimensions. Commonly called "volcanic ash". Compare cinders, lapilli, tephra.

Hydrologic cycle

Earth science; Soil science

The fate of water from the time of precipitation until the water has been returned to the atmosphere by evaporation and is again ready to be precipitated.

Humin

Earth science; Soil science

The fraction of the soil organic matter that cannot be extracted from soil with dilute alkali.

Carbon-organic nitrogen ratio

Earth science; Soil science

The ratio of the mass of organic carbon to the mass of organic nitrogen in soil, organic material, plants, or microbial cells.

Base level

Earth science; Soil science

The theoretical limit or lowest level toward which erosion of the Earth's surface constantly progresses but seldom, if ever, reaches; especially the level below which a stream cannot erode its bed. ...

Contact angle

Earth science; Soil science

Where water is in contact with a solid surface, the angle occurring on the liquid side of a meniscus or water droplet between the flat solid surface and the gas phase beyond the liquid.