Sand is of course loose soil but unless water logged will not act like quicksand in this regard.

沙子当然是松散的泥土，但如果没有经受水涝的话，它们还不会变成流沙。

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However, the contents of NH4 + -n in the Purplish clayey soil were significantly increased by water-logged incubation or by nitrogen fertilizer added.

而外加氮源或淹水处理对青紫泥nh4 + - N含量的提升作用则贯穿于培养试验的全过程。

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