Grass strip
Check to see of the field is already drained and what it is like after heavy rain,best speak to the previous landowner.
Start drainage work now if required,use a local agricultural drainage contractor.
Sow grass seed anytime up to late September,probably use a semi-vigourous rye grass mixture.A local farmer will probably drill it for you.
You have got to move fast to have a useable strip for next year.
Good luck.
Lister