Chernozem


Chernozem is a black-colored soil containing a high percentage of humus and high percentages of phosphoric acids, phosphorus, and ammonia. Chernozem is very fertile and can produce high agricultural yields with its high moisture storage capacity. Chernozems are also a Reference Soil Group of the World Reference Base for Soil Resources.

Distribution

The name comes from the Russian terms for black and soil, earth or land. The soil, rich in organic matter presenting a black color, was first identified by Russian geologist Vasily Dokuchaev in 1883 in the tallgrass steppe or prairie of European Russia.
Chernozems cover about 230 million hectares of land. There are two "chernozem belts" in the world. One is the Eurasian steppe which extends from eastern Croatia, along the Danube, southern Romania to northeast Ukraine across the Central Black Earth Region of Central Russia, southern Russia into Siberia. The other stretches from the Canadian Prairies in Manitoba through the Great Plains of the US as far south as Kansas. Similar soil types occur in Texas and Hungary. Chernozem layer thickness may vary widely, from several centimetres up to 1.5 metres in Ukraine, as well as the Red River Valley region in the Northern US and Canada.
The terrain can also be found in small quantities elsewhere. It also exists in Northeast China, near Harbin. The only true chernozem in Australia is located around Nimmitabel, with some of the richest soils in the nation.
Previously, there was a black market for the soil in Ukraine, where it is known as chornozem. The sale of agricultural land has been illegal in Ukraine since 1992 until the ban was lifted in 2020, but the soil, transported by truck, was able to be sold and bought. According to Kharkiv-based "Green Front" NGO, the black market for illegally acquired chernozem in Ukraine was projected to reach approximately US$900 million per year in 2011.

Canadian and United States soil classification

Chernozemic soils are a soil type in the Canadian system of soil classification and the World Reference Base for Soil Resources.

History

Theories of Chernozem origin: