This is known as the Maldekian crop circle
which (according to this link) contains a message:
Beware the bearers of FALSE gifts & their BROKEN PROMISES.Much PAIN But Still time.(unclear word).There is GOOD out there.We oppose DECEPTION.COnduit CLOSING\
According to the RedGrittyBrick's comment, It seems to be a genuine 2002 cornfield art-work by anonymous fun-loving Hampshire artists. Can any human technology available to common people create this (probably) overnight during reduced visibility? How?
Wikipedia says that these images usually appear overnight (it seems this is the case since there is no evidence about its creation; during the day somebody would probably notice). Some similar crop circles are beautiful and seemingly difficult to create like this, but they mostly consist of simple circles ind lines, maybe even some GPS tracking points. Here the width of the lines requires great deal of precision, so the difference from other crop circles is the complexity: note well shaped spiral on the disc, the end of its track and the exact width of the lines on the face.