At LAST!

I, finally, found one. 
Not that the "Plastic fields" were hard to spot, just hard to find one with two valuable attributes:-
1. Close enough to home to make a visit easy.
2. Close enough to both the road and a handy patch 
to use as a 1-car Lay-by.
"We" were quite certain it was plastic, equally certain it was for Maize. What I'd been unable to keep an eye on was its development. I'm now wondering what the lumpy things are at start of some rows are, Roll centres? :¬O