The cross-sectional area of the ridge was measured with a coordinate measuring device (Biotechnical Faculty, Department of Agronomy, Ljubljana, Slovenia) shown in Figure 2 that allows absolute and relative measurements of the distance within the following area: 1,000 mm in the transverse direction, 450 mm in the longitudinal direction, and 600 mm in the vertical direction. All directions include a ± 0.5 mm accuracy.