Concept of 'Soil Catena' is given by

A catena in soil science is a series of distinct but co-evolving soils arrayed down a slope. A mature catena is in equilibrium as the processes of deposition and erosion are in balance.
The catena concept originated in central Uganda, by chemist W. S. Martin to describe a hill slope sequence at the Bukalasa station.
The term catena was first coined by scientist Geoffrey Milne to describe these soil-topography units.