As nouns the difference between solum and topsoil
is that solum is within a soil profile, a set of related soil horizons that share the same cycle of pedogenic processes while topsoil is the most fertile soil, easiest to start new plants in.
solum
English
Noun
(sola)
Within a soil profile, a set of related soil horizons that share the same cycle of pedogenic processes.
The upper layers of a soil profile that are affected by climate.
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topsoil
English
Noun
(
en noun)
The most fertile soil, easiest to start new plants in.
- Little grew on the farm, after the floods from the hurricane washed away the topsoil .
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