How often can cork bark be harvested from cork oak trees?

A. Every year, just like grapes

B. Once every 50 years

C. Once every 3 years

D. Once every 9 years


Cork oak trees can be harvested for the first time for cork bark after about 25 years. Thereafter, the tree bark is harvested every 9 years. A cork tree will be “stripped,” on average, sixteen times in its 150 to 200 life. There is a saying in Portugal (where most of the world’s cork oak forests exist) that: Nature got it wrong–there should be a cork harvest every year, but women should have babies just once every nine years.

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