The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball, about ...

A study led by Prof. Chen Hongsong from the Institute of Subtropical Agriculture of the Chinese Academy of Sciences (CAS) has ...

Brown earth soils are widespread in Britain ... The original vegetation was deciduous forest, resulting in a layer of decaying leaves giving a rich humus. The deep roots of these trees reached ...

The layer acts as a skin for the Earth, protecting landscapes and reducing ... Biocrust, also called cryptobiotic soil, is a "community of tiny, dirt-dwelling organisms that form a distinct ...

Soils are becoming severely degraded due to a combination of intensive farming practices and natural processes. As the layer of fertile topsoil thins, it gets increasingly difficult to grow crops ...

There are three main British soils; podzol, brown earth and gley. Podzols are easily recognisable by their distinct layers or horizons. A grey or light-coloured 'E' horizon is the result of severe ...