populacyjnej
Populacyjnej is not a standalone concept but a grammatical form of the Polish adjective populacyjny, used to describe something related to population. The base noun is populacja, and the related adjectives are used to express population characteristics, dynamics or policy. The form populacyjnej appears in feminine nouns in genitive or dative singular, and in other cases depending on grammatical role.
In practice, populacyjnej appears in phrases such as poliytyka populacyjnej (of population policy) or strukturze populacyjnej
Usage notes: the masculine and neuter counterparts are populacyjny and populacyjne, respectively, while feminine nominative is
In summary, populacyjnej is a grammatical form used to express population-related relationships in feminine genitive or