nonfarming land; untilled land
Refers to land that is not being cultivated or farmed, often in agricultural or land-use contexts.
There is a large area of nonfarming land in this region.
耕作地 means cultivated or farmed land, the opposite of 不耕作地.
休耕地 is fallow land left uncultivated for a period, while 不耕作地 is simply land not used for farming, without implying a rest period.
Compound of 不 (fu-, 'non-') + 耕作 (kousaku, 'farming, cultivation') + 地 (chi, 'land').