[AT] ground

[Kevin]

We are getting some extra cold temps for this area, Western, KY.
And the mud and ruts are frozen rock hard. Something unusual as 99% of the time the ground has melted on top by 11:00 am. Now this stuff seems like it is hard on tractor tires, shook off 400# weights this morning feeding.
What air pressure do you use on frozen ruts in the rear tractor tires on this kind of ground ?
ironman
kevin Mosier