Hey,
It is indeed accessible to agricultural vehicles. I hope I added the signs correctly.

Pictures:
https://norwi.de/osm/note/2192951-001.jpg (@ 53.44478, 9.72782 facing east)
https://norwi.de/osm/note/2192951-002.jpg (@ 53.44479, 9.73059 facing east)
https://norwi.de/osm/note/2192951-003.jpg (@ 53.44449, 9.73278 facing east)
https://norwi.de/osm/note/2192951-004.jpg (@ 53.43949, 9.74906 facing north west)