planosol means A soil with a light-coloured, coarse-textured surface horizon that shows signs of periodic water stagnation and abruptly overlies a dense, slowly permeable subsoil with significantly more clay than the surface horizon. Lexicurio rates it Sui generis — a strength score of 90 out of 100.
Etymology
From plane + -o- + sol.
noun
- A soil with a light-coloured, coarse-textured surface horizon that shows signs of periodic water stagnation and abruptly overlies a dense, slowly permeable subsoil with significantly more clay than the surface horizon.