"Arable land is characterized by the production of crops for food or feed supply purposes, a ‘normal’ permeability and a substantial soil erosion potential at least due to episodic bare or dead fallow periods. At present all agricultural land that is not pasture or grassland is considered arable land" (Bachmann 2006)
Bachmann, Till M. 2006. “Modelling the Environmental Fate in the Terrestrial Environment.” In Trace Metals and Other Contaminants in the Environment, 87–133. https://doi.org/10.1016/S0927-5215(06)80011-1.