We found 2 dictionaries that define the word surface soils:

General (2 matching dictionaries)

1. surface soils: Merriam-Webster
2. surface soils: Vocabulary.com

(Note: See surface_soil as well.)

Definitions from WordNet (surface soil) ▸ noun:  the layer of soil on the surface ▸ Also see surface_soil ▸ Words similar to surface soils ▸ Usage examples for surface soils ▸ Idioms related to surface soils ▸ Wikipedia articles (New!) ▸ Words that often appear near surface soils ▸ Rhymes of surface soils ▸ Invented words related to surface soils