The iron and aluminium oxides collect in the 'B' horizon where the iron oxides can accumulate to form a thin layer of hardpan, which impedes drainage through the soil. Illuviation is the process ...

Gley soils represent the most extensive soil cover in Scotland. These soils are found on gentler slopes or in areas of high rainfall where the water does not drain away readily. All the glacial ...

However, China's black soil has been degraded over the years by poor land management practices and the heavy use of chemical fertilizers. "The formation process of black soil is extremely slow ...

Scientists have discovered a new phylum of microbes in the Earth’s Critical Zone, an area of deep soil that restores water quality. Ground water, which becomes drinking water, passes through where ...