Farming calligraphy? Or an alien's script? Either way it is an interesting variant on 'crop circles'.
<a rel="nofollow" class="external text" href="https://www.geograph.org.uk/profile/7629">Stanley Howe</a>
CC BY-SA 2.0
From <a rel="nofollow" class="external text" href="https://www.geograph.org.uk/photo/600399">geograph.org.uk</a>