part of adjacent to atmospheric boundary layer area of cropland An area of a planet's surface which is partly covered either by annual crops and perennial woody crops or by actively tilled land. This area is in contact with an atmospheric column extending from the planetary boundary layer to the planet's exosphere with little to no physical obstruction. nlcd2011 This class is in need of refinement, particularly in linking to other entities in the ontology. However, it is suitable for use in annotating remotely sensed land types. According to the NLCD 2011, at least 20% of these areas are covered by croplands or actively tilled land. Such thresholds - which are themselves fuzzy - are not strictly asserted in this definition. The NLCD provides corn, soybeans, vegetables, tobacco, and cotton as examples of annual crops and the trees and vines in orchards and vineyards as examples of perennial woody crops. NLCD:82 cultivated crops cropland ecosystem vegetated area