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腐殖质

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  • 腐殖质的主要来源?

    腐殖质是一类呈棕至黑色的无固定形状的有机复杂团聚体,它来自于好氧及厌氧条件下,在微生物作用下动植物残体的分解物,通常发生在土壤、堆肥、泥炭坑和水相盆地。从化学角度分析,腐殖质包括植物源的难分解的组分,[详细]

    2023-02-18 12:19 分类:问答
  • Drawing star shapes with variable parameters

    I have task to write program allowing users to draw stars, which can differ in size and amount of arms. When I was dealing with basic stars I was doing it with GeneralPath and tables of points :[详细]

    2022-12-27 22:25 分类:问答