Soil based ecosystem services: an overarching concept referring to one (out of five, following Schulte et al., 2014) elemental aspect of the soil system that contributes to the generation of goods and services.
The contemporary principal soil functions pertaining to agricultural land use (U110) and forestry (U120) include: (1) primary productivity, (2) water purification and regulation, (3) carbon sequestration and other aspects of climate regulation, (4) provision of a habitat for functional and intrinsic biodiversity and (5) nutrient cycling and provision, with:
SFi,j = F (soil features, environmental variables, management options)
where SFi,j is soil function i for agricultural objective j.
More info here http://landmark2020.eu/soil-functions-concept/