This is the 4224th most frequent Russian word.
херсонском
The word "херсонском" is the prepositional case of the adjective "херсонский," meaning "Kherson" (relating to the city of Kherson in Ukraine).
In this sentence, "херсонском" is used as an adjective to describe the branch of the company located in Kherson.
Он работает в херсонском филиале компании.
He works in the Kherson branch of the company.
Here, "херсонском" acts as an attributive adjective for the lake, indicating its geographical location.
На херсонском озере можно увидеть много редких птиц.
In the Kherson lake, one can see many rare birds.
In this example, "херсонском" is used in the prepositional case to indicate the topic of the discussion regarding Kherson's agriculture.