Spuds do well through it and they are all near the surface (but not green.) Slugs can be a pest-put some killer about underneath your plastic. Runners another one I used to do.

Bit concerned that you are too late now for glyphosate on growing land (round -up expensive brand name) as you need to wait until everything resprouts spray and then let the plants take it up for 6 weeks or so.

Don't try and grow carrots in weed infested land -get an old dustbin and grow them in that for this year.

__________________
Advertising is the rattling of a stick in a swill bucket. George Orwell
Paul