Best way to patch a partially failed field?

[5312]

We have one field drilled with barley just before the rain, it was waterlogged for a while and now only has a crop on about half the area.

Is it best to redrill the whole field or just the bare areas?

It's about 25 acres in total

 

[beefandsleep]

Spring barley, pre harvest round up

 

[Michael S]

World's worst job patching fields in my experience, and it maybe my poor judgement, but it never seems that you do enough.