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As a result, Amazonian societies benefitted from the dark earth in terms of agricultural success and enhanced food production. Soil analyses have been completed on the modern and ancient Kuikuro Indigenous Territory in the Upper Xingu River basin in southeastern Amazonia through archaeological and ethnographic research to determine the human ...
The A horizon is the top layer of the mineral soil horizons, often referred to as 'topsoil'. This layer contains dark decomposed organic matter, which is called "humus". The technical definition of an A horizon may vary between the systems, but it is most commonly described in terms relative to deeper layers.
Young boy grinding sugar cane near Flumpa, Nimba County, 1968. Agriculture in Liberia is a major sector of the country's economy worth 38.8% of GDP, employing more than 70% of the population and providing a valuable export for one of the world's least developed countries (as defined by the UN).
Iron ore mining. The mining industry of Liberia has witnessed a revival after the civil war which ended in 2003. [1] Gold, diamonds, and iron ore form the core minerals of the mining sector with a new Mineral Development Policy and Mining Code being put in place to attract foreign investments. [2]
Dark soil color imparted by organic matter in Illinois, US. Dark brown or black colors typically indicate that the soil has a high organic matter content. [4] Organic matter coats mineral soil particles, which masks or darkens the natural mineral colors. [1] Sodium content also influences the depth of organic matter and therefore the soil color.
Liberia has some of the largest iron ore reserves in Africa, with iron content of 30% to 67%, in banded iron formations from the Precambrian. The high grade ores, with more than 60% are primarily hematite, while lower grade ores with 30 to 40% iron are generally magnetite. Liberia also has medium-grade deposits of mixed hematite and magnetite.
Heavy minerals (dark) in a quartz beach sand (Chennai, India). Heavy mineral sands are a class of ore deposit which is an important source of zirconium , titanium , thorium , tungsten , rare-earth elements , the industrial minerals diamond , sapphire , garnet , and occasionally precious metals or gemstones .
Communications in Liberia is the press, radio, television, fixed and mobile telephones, and the Internet. There are six major newspapers in Liberia, and 45% of the population has a mobile phone service. Also, the radio stations in Liberia are abundant to the extent that there are over 70 radio stations in the entire country (Liberia).