板结

dǎo xià de shù mù zài bǎn jié de yū ní shang liú xia le qīng xī de yā hén

倒下的树木在板结的淤泥上留下了清晰的压痕。

The fallen trees had left a clear pressure mark in the hardened mud.

bǎn jié tǔ rǎng

板结土壤

hardened and impervious soil