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Clay soils are generally less suitable for crops due to poor natural drainage, however clay soils are more fertile, due to higher cation-exchange capacity. [9] [10] Clay is a very common substance. Shale, formed largely from clay, is the most common sedimentary rock. [11]
Clay cannot be resolved by optical microscopes as its particles are 0.002 mm (7.9 × 10 −5 in) or less in diameter and a thickness of only 10 angstroms (10 −10 m). [16] [17] In medium-textured soils, clay is often washed downward through the soil profile (a process called eluviation) and accumulates in the subsoil (a process called ...
Ctenotus helenae, also known commonly as the clay-soil ctenotus, is a species of skink, a lizard in the family Scincidae. The species is endemic to Australia.
The ABC Television Network has provided a live streaming service of world news, known as "ABC News Live," for eighteen hours per day, since 2018. This is available via ABC's official platform on Hulu, as well as the network's official YouTube channel. [1] In 2014, the CBS Television Network launched a live streaming news service, entitled "CBSN ...
Soil texture triangle showing the USDA classification system based on grain size Map of global soil regions from the USDA. For soil resources, experience has shown that a natural system approach to classification, i.e. grouping soils by their intrinsic property (soil morphology), behaviour, or genesis, results in classes that can be interpreted for many diverse uses.
The formation of the claypan relates to a lack of vegetation coverage, soil particle size distribution, and high rainfall. The lack of vegetation coverage makes soil become more susceptible to raindrop attacks. When the raindrops hit on bare soil with high energy, the fine sand, silt, and clay particles are re-arranged to plug all the pore spaces.
Expansive clay, also called expansive soil, is a clay soil prone to large volume changes (swelling and shrinking) directly related to changes in water content. [1] Soils with a high content of expansive minerals can form deep cracks in drier seasons or years; such soils are called vertisols .
In soils, clay is a soil textural class and is defined in a physical sense as any mineral particle less than 2 μm (8 × 10 −5 in) in effective diameter. Many soil minerals, such as gypsum , carbonates, or quartz, are small enough to be classified as clay based on their physical size, but chemically they do not afford the same utility as do ...