A compacted layer in cultivated soil resulting from repeated ploughing.
犁底层，犁磐层
Example sentencesExamples
Plough pans are caused by the smearing action of disc ploughs continually operating at the same depth over a long period.
The decline in cotton yields in the Sudan, has been partially attributed to deterioration in soil physical properties and the formation of a plough pan 20 cm deep as a result of the repeated use of the disc plough for land preparation.