They do not look very oily. On the contrary a wonderful sight. Last year there were hundreds of sunflowers planted in a field bordering on our town, and I often went on a photo safari to capture their beauty: but why about 500 sunflowers or more. They were planted for the production of sunflower oil which is won from the seeds.
And this is a field of Rapeseed, also near where I live and grown for the production of Rapeseed oil. Switzerland does not have many natural resource. There are no oil wells springing out of the ground and pumping. Our oil grows peacefully in a field until it is harvested.