Land used permanently (five years or more) to grow herbaceous forage crops through cultivation or naturally (wild prairie or grazing land). Permanent meadows and pastures on which trees and shrubs are grown should be recorded under this heading only if the growing of forage crops is the most important use of the area. Measures may be taken to keep or increase productivity of the land (i.e., use of fertilisers, mowing or systematic grazing by domestic animals).
FAO and SEEA (System of Environmental-Economic Accounting 2012— Central Framework)
https://unstats.un.org/unsd/envaccounting/seearev/seea_cf_final_en.pdf