In agriculture, the word field refers generally to an area of land enclosed or otherwise and used for agricultural purposes such as: Cultivating crops Usage as a paddock or, generally, an enclosure of livestock Land left to lie fallow or as arable land Cows in green field – nullamunjie olive grove. jpg A green field or paddock with Hereford cattle. Field Hamois Belgium Luc Viatour. jpg A summer field. Two women in yellow field.