Fig. 2From: Quantification of seed–soil contact of sugar beet (Beta vulgaris) using X-ray Computed TomographyThe underlying “iceberg effect”. a Schematic representation of the iceberg effect based on 2D slices showing in b. b Example 2D slice showing contact are in blue and example underlying soil grain behind a single contact point (red). c Schematic representation of creating rings. d Calculations for the volume and surface effect as well as the change in soil mass based on the short range and long range ring created in step CBack to article page