Again, you've obviously never driven through farmland, in a lot of those places the highway is seriously recessed from the rest. Also you've obviously never walked through a late season cornfield, the corn gets taller than people. Depending on the terrain, the crop and the age (which since it's all brown would indicate late, ie tall) it's not too hard to have a 20' "wall" on either side of the highway about 15' laterally away from it, as long as what you're doing doesn't cross the visibility line (which would be the extension of the line from your eyes to the top of the the highest crop you can see) it's invisible. And given the serious angle of that site line that's gotta stick up pretty tall (20' higher for every 15' of lateral distance from you, so something 60 feet from the road would have to stick up more than 80' in the air (getting a bonus from being on a hill relative to you of course) to be visible. Now given that a standard 18 wheeler is about 60' in length and I guessed 2 18-wheeler lengths (or 120') that means that in order to be visible from the road something would have to stick up 160' in the air to be seen from the road (that's at the point of the crop circle nearest the road). Now which is most likely to be able to bend some stalks and NOT stick up up 160' in the air: people with rope and plywood or a flying saucer.
Again, you've obviously never driven through farmland, in a lot of those places the highway is seriously recessed from the rest. And again, you're making a false assumtion. I have driven through MANY types of farmland, flatland, rolling hills, and mountainous. I know what farm land looks like while driving, rest assured..
Also you've obviously never walked through a late season cornfield, the corn gets taller than people.
You're throwing out a red herring, as the Julia formation in question was formed in wheat..
Wiltshire - July 7, 1996
Depending on the terrain, the crop and the age (which since it's all brown would indicate late, ie tall) it's not too hard to have a 20' "wall" on either side of the highway about 15' laterally away from it, as long as what you're doing doesn't cross the visibility line (which would be the extension of the line from your eyes to the top of the the highest crop you can see) it's invisible.
For one, the wheat isn't that tall. Secondly, the date was July 7, 1996, so I don't think that is harvest time for wheat in England. Additionally, you can see from the image that the field is relatively flat and the vehicles traveling by it have a direct line of sight to the formation..
You are grasping for straws here...