pedo-, ped- +

A surface formation that has undergone one or more pedogenic (soil-forming) processes: A pedolith can bn be created by mull soils (which tend to be alkaline) or by more soils (that are acid).

The relative maturity of a soil profile: In class Susan learned about the pedologic age as being the matureness or age of the of the earth's soils, shown in various layers.

A soil considered without regard to its stratigraphic relations: Jane found out that each pedagogic unit might reveal certain environmental situations.

Study of the structure and formation of soils; soil science: Pedology is the scientific examination of soils, including their origins, characteristics, and classifications.

The smallest vertical column of soil containing all the soil horizons at a given location: A peon is the smallest unit or volume of soil that represents or exemplifies all the horizons of a soil profile; it is usually a horizontal, hexagonal area of about one square meter, or possibly larger.

A reference to a soil feature that is derived from a pre-existing soil horizon: Mr. Thompson examined the pedorelic aspects of the earth samples in his lab.

That shell or upper layer of the earth in which soil-forming processes occur: A pedosphere is that component of the biosphere comprising the soil and soil organisms.
2.

Any of the various processes by which the surface of the soil is disturbed: Pedoturbation consists of soil being mixed by faunal pedoturbation, like the burrowing of rabbits and moles, and floral pedoturbation, like root growth and the uprooting of trees.