Seeing the original photo I thought it looked like the u/c had collapsed but seeing others I realise it's a rise in the field hiding them. It had lots of covers on various bits on the last local TV news I watched and it looked like the ends of the rotor were secured with some sort of tie-down as well. Plus a couple of little camouflage tents were visible.
You can see the rotor blade ties and some of the covers in the photo in this article:
Apache helicopter forced to land in Aberdeen field - The Scotsman