The field being trampled and only mud remaining is an example of a
secondary succession.
Secondary succession involves the removal of organisms from an
area/place where they previously existed. This is as a result of different
factors such as deforestation, fire etc.
In secondary succession. the organisms are removed and some destroyed
but the soil in which they lived is usually very much present. This
differentiates it from primary succession in which the soil is usually
destroyed and an example is volcanic eruption which causes this occurrence.
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