Forgive me for asking this, but if you are only talking about telephone wires, surely you won't have the option of flying under them.
In this neck of the woods they are only about 15' above the deck, and with catenary between the posts, that'll reduce to 10-12'. Take off the height of the hedges/fences of 6' and you'd have to limbo dance through them.
As said earlier, the proper approach looks to aim 1/3 into the field so you should have sufficient height to clear the obstruction and land safely. If not, it was probably the wrong field to start with.