Soil horizon
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A soil horizon is a layer parallel to the soil surface whose physical, chemical and biological characteristics differ from the layers above and beneath. Horizons are defined in many cases by obvious p
A cross section of a soil, revealing horizons
Surface runoff, a potential pathway for nonpoint source pollution, from a farm field in Iowa during a rain storm
Albic Luvisol – dark surface horizon on a bleached subsurface horizon (an albic horizon) that tongues into a clay illuviation (Bt) horizon
Soil profile of a road in Bengaluru
Soil
Videos
Soil, also commonly referred to as earth, is a mixture of organic matter, minerals, gases, water, and organisms that together support the life of plants and soil organisms. Some scientific definitions
Soil horizon
…A soil horizon is a layer parallel to the soil surface whose physical, chemical and biological characteristics differ from the layers above and beneath. Horizons are defined in many cases by obvious…
Surface-water-gley developed in glacial till in Northern Ireland
Soil measuring and surveying device
A, B, and C represent the soil profile, a notation firstly coined by Vasily Dokuchaev (1846–1903), the father of pedology. Here, A is the topsoil; B is a regolith; C is a saprolite (a less-weathered regolith); the bottom-most layer represents the bedrock.
Desertification