Black soil region of northeast China is one of areas that modern soil erosion is severest.
东北黑土区是现代土壤侵蚀严重的地区之一。
It was found that the humus layer in black soil region was thick in north and thin in south, which was due to the climatic condition and soil-forming process.
研究发现,深厚黑土主要分布于黑土区北部,中厚与薄层黑土则分别集中在黑土区的中部和南部,这主要与黑土分布区的气候条件和黑土的成土过程有关。
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