Ready to harvest.
A tulip farm in the province of Flevoland is ready for harvest season starting on 5 October. The beginning of the fall marks the harvest time for tulips in Holland. Holland produces 4.32 billion of good quality tulip bulbs every year. Tulips are one of Holland’s main exports. The Netherlands exports 1.2 billion tulip bulbs throughout the world.
“Tulips are one of Holland’s main export.” What does the underlined word mean?