Table 1 Investigated soil properties and their abbreviations

Organic carbon stock of OL organic horizon

kg m⁻²

OC_OL

Organic carbon stock of OF organic horizon

kg m⁻²

OC_OF

Organic carbon stock of OH organic horizon

kg m⁻²

OC_OH

 OC_OL +  OC_OF+ OC_OH

kg m⁻²

OC_O

Soil organic carbon content of the 0–10 cm mineral soil layer

%

SOC₁

Soil organic carbon content of the 10–30 cm or 10–35 cm mineral soil layer

%

SOC₂

Soil organic carbon content of the 30–60 cm or 35–60 cm mineral soil layer

%

SOC₃

Soil organic carbon stock of the 0–30 cm or 0–35 cm mineral soil layer

kg m⁻²

SOC_stock

C:N ratio of the 0–10 cm mineral layer

CN₁

C:N ratio of the 10–30 cm or 10–35 cm mineral layer

CN₂

C:N ratio of the 30–60 cm or 35–60 cm mineral layer

CN₃

pH in water of the 0–10 cm mineral layer

pH_w1

pH in water of the 10–30 cm or 10–35 cm mineral layers

pH_w2

pH in water of the 30–60 cm or 35–60 cm mineral layers

pH_w3

Available phosphorus content of the 0–10 cm mineral layer

mg kg⁻¹

P_av

Humus index

Hum_ind

Bulk density of the 0–10 cm mineral layer

g cm^–3

BD₁

Bulk density of the 10–30 cm or 10–35 cm mineral layers

g cm⁻³

BD₂