Test for WRB 2022 Ch 3.2.15 takyric surface-crust signature
Source:R/utils-diagnostic-tests-v033.R
test_takyric_surface.RdSurface mineral crust with: clay-loam-or-finer texture, platy/massive structure, polygonal cracks >= 2 cm deep with spacing <= 20 cm, rupture-resistance \>= "hard" when dry, plasticity \>= "moderately plastic" when moist, EC < 4 dS/m OR >= 1 dS/m less than the layer below. v0.3.3 enforces texture + structure + cracks + EC.