Definition: Crops under glass or high (accessible) cover
Crop stat. - EU legislation
"Crops under glass or high (accessible) cover" means crops which, for the whole of their period of growth or for the predominant part of it, are covered by greenhouses or fixed or mobile high cover (glass or rigid or flexible plastic). This excludes sheets of plastic laid flat on the ground, as well as land under cloches or tunnels not accessible to man or movable glass-covered frames. Areas of crops which are grown temporarily under glass and temporarily in the open air are reported as entirely under glass, unless the period under glass is of extremely limited duration.
European Union, Regulation (EC) No 543/2009 of the European Parliament and of the Council of 18 June 2009 concerning crop statistics and repealing Council Regulations (EEC) No 837/90 and (EEC) No 959/93