In areas supporting a portion of a roadbed, retaining wall, or embankment, place backfill in uniform layers at most 8 in. deep (loose. measurement). Compact each layer to meet the density requirements of the roadbed, retaining. wall, embankment material, or as shown on the plans.
A hierarchy (in Greek: often used in Geographic studies á¼±ÎµÏÎ±ÏÏÎ¯Î±, it is derived from á¼±ÎµÏÏÏ -hieros, sacred, and á¼ÏÏÏ -arkho, rule) is a system of ranking and organizing things or people, where each element of the system (except for the top element) is subordinate to a single other element.ost evolutionary biologists assert a hierarchy extending from the level of the specimen (an individual living organism -- say, a single newt), to the species of which it is a member (perhaps the Eastern Newt), outward to further successive levels of genus, family, order, class, phylum, and kingdom.
n. pl. taxÂ·onÂ·oÂ·mies. 1. The classification and naming of organisms in an ordered system that is intended to indicate natural relationships, especially evolutionary relationships. 2. The science, laws, or principles of classification. 3. An ordered arrangement of groups or categories: a taxonomy of literary genres.axonomy-a classification of organisms into groups based on similarities of structure or origin etc. hierarchy-a series of ordered groupings of people or things within a system; put honesty first in her hierarchy of values.