zonal soil

noun

Definition of zonal soil

1 :a major soil group often classified as a category of the highest rank and generally covering a wide geographic region or zone and embracing soils that are well-developed from the parent material by the normal soil-forming action of climate and living organisms — compare azonal soil, intrazonal soil
2 :a soil (as many grassland and desert soils) belonging to a major soil group or category

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