How tall where the hedgerows in Normandy

Last year, my wife and I did a tour of the beaches in Normandy.   The tour guide pointed out that the farms in Normandy had a unique style if buildings.  But the interesting part was that the current hedgerows are only 50 some years old.   When the war ended the French government decided to remove all the hedgerows.  Why they said the hedgerows impede the modernization of the country side.  Later it became apparent why the hedgerows important to Normandy, wind soil erosion.  In the 50's the wind had stripped off most of the good top soil.  The farmer couldn't grow the food.  It become like the dust bowl of Oklahoma.  Don't make your hedgerows to small.

Here what a hedgerow should look like.