An intrazonal soil having a thin, strongly leached surface horizon overlying a compacted hardpan or claypan, and occurring on flat uplands with poor drainage.
Origin
1930s. From plano- + -sol.
Definition of planosol in US English:
planosol
nounˈpleɪnəsɒl
An intrazonal soil having a thin, strongly leached surface horizon overlying a compacted hardpan or claypan, and occurring on flat uplands with poor drainage.