We live about 8 miles inland from the Wash so winds are quite strong and the plan (apparently) is to have permeable hedges to break up the wind effect on the veg garden and shelter the poly tunnel. The other angles are broken up by the row of houses and some large conifers which are, luckily, far enough way not to cast their shadows on our land!
Along the long fence line we have gone for 45 ft plus of privet and 30 ft of Escollonia at least this will hide the rubbish post and rail fence we inherited. Across the bottom of the field is the natural species hedge I have written about before - hazel, alder, dog rose, etc.
We love the big open skies of north norfolk but it can be windy. Look what happened to our scarecrow after the storms just before Easter.
He has had to come down to the house to be dried and rebuilt!