Cultivated land that is not seeded for one or more growing seasons WordNet 3.0 & Open English WordNet

Crop rotation is the practice of growing a series of different types of crops in the same area across a sequence of growing seasons. Wikipedia

A farming practice Wikipedia Disambiguation

Practice of growing a series of dissimilar or different types of crops in the same area in sequenced seasons Wikidata

Arable land not under rotation that is set at rest for a period of time ranging from one to five years before it is cultivated again, or land usually under permanent crops, meadows or pastures, which is not being used for that purpose for a period of at least one year. Arable land which is normally used for the cultivation of temporary crops but which is temporarily used for grazing is included. OmegaWiki

Uncultivated land. OmegaWiki

An agricultural technique in which, season after season, each field is sown with crop plants in a regular rotation, each crop being repeated at intervals of several years. OmegaWiki

A farming practice in which the same land is used to grow different crops in successive seasons or years (when once the land would have been left fallow); used to prevent erosion and increase fertility. Wiktionary

Farming practice. Wiktionary (translation)