This is the 8752nd most frequent Polish word.
rolna
"Rolna" means "agricultural" or "related to farming" in English.
In this sentence, 'rolna' is an adjective describing the type of land—specifically, land used for agriculture.
Ziemia rolna jest wartościowym zasobem dla każdego kraju.
Agricultural land is a valuable resource for every country.
Here, 'rolna' is an adjective qualifying the noun 'gospodarka' (economy), indicating it pertains to agricultural or farming activities.
Gospodarka rolna wymaga dużo pracy i zaangażowania.
Agricultural economy requires a lot of work and dedication.
In this case, 'rolna' describes a type of machine, one used for farming or agriculture.