Chernozem, or Black Earth (from Polish czarnoziem which means black soil), a kind of soil. This black-coloured soil contains a very high percentage of humus — 3% to 15%, rich in phosphoric acids, phosphorus and ammonia. It has a large depth, often more than 40 inches, up to 250 inches (6 metres) in Ukraine. It is very fertile and does not require any fertilizing. Because of that it is often considered to be the best kind of soil. Loess field in Germany Soil horizons are formed by combined biological, chemical and physical alterations. ... Humus is a word actually used for two different things, which are both related to soil and thus get used interchangeably. ... Phosphoric acid, also known as orthophosphoric acid or phosphoric(V) acid, is an inorganic mineral acid having the chemical formula H3PO4. ... General Name, Symbol, Number phosphorus, P, 15 Chemical series nonmetals Group, Period, Block 15, 3, p Appearance waxy white/ red/ black/ colorless Atomic mass 30. ... Ammonia is a compound of nitrogen and hydrogen with the formula NH3. ... The metre, or meter (US), is a measure of length. ... Loess field in Germany Soil horizons are formed by combined biological, chemical and physical alterations. ...

There are two "Chernozem belts" in the world: from Northeast Ukraine across Black Earth Region and Southern Russia into Siberia, and in Manitoba, Canada. Similar soil types occur in Texas. Central Black Earth Region or Central Chernozem Region (Центрально-черноземная область, центральная че&#1088... Siberian Federal District (dark red) and the broadest definition of Siberia (red) Siberia (Russian: , Sibir’; Tatar: Seber) is a vast region of Russia and northern Kazakhstan constituting almost all of Northern Asia. ... Motto: Gloriosus et Liber (Latin: Glorious and free) Official languages English and French, per mandate of the Constitution Act 1982 Flower Prairie Crocus Tree White Spruce Bird Great Grey Owl Capital Winnipeg Largest city Winnipeg Lieutenant-Governor John Harvard Premier Gary Doer (NDP) Parliamentary representation  - House seat  - Senate seats 14... Official language(s) See: Languages of Texas Capital Austin Largest city Houston Area  Ranked 2nd  - Total 268,581 sq mi (695,622 km²)  - Width 773 miles (1,244 km)  - Length 790 miles (1,270 km)  - % water 2. ...

Chernozemic soils are a soil type in the Canadian system of soil classification and the United Nations' FAO soil classification. soil types In terms of soil texture, Soil type usually refers to the different sizes of mineral particles in a particular sample. ... The United Nations (UN) is an international organization whose stated aims are to facilitate co-operation in international law, international security, economic development, and social equity. ... The FAO developed a supra-national classification, also called World Soil Classification, which offers useful generalizations about soils pedogenesis in relation to the interactions with the main soil-forming factors. ...

Soil taxonomy provided by United States Department of Agriculture / Natural Resources Conservation Centre provides an elaborate classification of soil types according to several parameters and in several levels: Order, Suborder, Great Group, Subgroup, Family, and Series. ...

References

Pedosphere.com