Posted by senior arable reporter Andrew Blake:
It's charlock! That was my immediate reaction on seeing this picture and many similarly yellow fields when driving through the west midlands last week.
But it's not. This winter's extraordinary weather has seen many crops which escaped the odd frosts think it's already spring so they've been flowering like mad.
The big question is how should these crops now be managed?
Unsurprisingly one fertiliser company is warning that they could soon run out of nitrogen if they haven't had any of the bag stuff yet.
With so much more effort now going into raising UK yields of this key crop it's a fresh challenge to all those clever commentators out there.
This picture of a field at Fakenham in Norfolk was taken by Mike Thompson of N W Agronomy Ltd on 3 March 2007.