This is the 1304th most frequent Russian word.
сельского
Rural.
Here, "сельского" is used in the genitive singular case to describe "местности" (countryside), showing a possessive or associative relationship.
Я вырос в сельского местности.
I grew up in the countryside.
In this sentence, "сельского" modifies "хозяйства" (agriculture) in the genitive singular form, indicating the concept of rural or farm-related.
Мы посетили музей сельского хозяйства.
We visited the Museum of Agriculture.
The word "сельского" describes "учителя" (teacher), indicating where the teacher is from or works, in the genitive singular case.