In message , DaveDay34
writes
I think you need to give us some more info.

Indeed.

If the ground is to be sued for planting afterwards then neither is the
answer - certainly not Sodium Chlorate

Glyphosphate would be better, - kills both tops and roots, so less
re-growth, and 'deactivated' on contact with soil so doesn't affect
replanting.

Mulching with black plastic permeable membrane etc. id also effective
given a little while.

--
Chris French and Helen Johnson, Leeds
urg Suppliers and References FAQ:
http://www.familyfrench.co.uk/garden/urgfaq/index.html