These are used to keep the wild grass down at Wicken Fen.
Simple QRP projects, 10m, 8m, 6m, 4m, FT8, 160m, WSPR, LF/MF, sub-9kHz, nanowaves and other random stuff, some not related to amateur radio.
In our quiet part of the village is this delightful green. One of the trees has half its leaves of a different colour.