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2.Examples of density dependent factors are food, shelter, predation, competition, and diseases while examples of density independent factors are natural calamities like floods, fires, tornados, droughts, extreme temperatures, and the disturbance of the habitat of living organisms.
Density index (or relative density) is the measure of compaction of non-cohesive soils naturally com-. pacted as a result of geological processes. It also is used for compaction control of non-cohesive soils built in. hydraulic embankments.