Thin layers of sandy shale, and carbonaceous fragments are locally present.

局部出现砂质页岩薄层和碳质碎屑。

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Quaternary red clay total nitrogen content was highest, but the available nitrogen content was lower than Granite soil and Purple sandy shale soil.

第四纪红土土壤全氮含量较高，但是其碱解氮含量比花岗岩母质土壤和紫色砂页岩土壤低。

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