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Why is northeast land called black land? How is it formed? Is it better than loess land?
Piracy: black soil is the result of the evolution of humus formed by the death of surface vegetation in cold climate. It is famous for its high content of organic matter, fertile soil, loose soil and the most suitable for cultivation. It is known as "grain warehouse" because it takes 400 years to form a 1 cm thick black soil layer
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