I’d hold off planting until soil temps reach 65 degrees or better.

As far as fertilizing…….If you fertilized according to a test last fall then your “P” is likely still ok, it holds well for a long period. Your “K” has likely dropped some but I doubt it’s bottomed back out. It’ll hold better and better as you improve the OM% in the soil. I’d probably just add a bag or two of 0-0-60 per acre at planting and then retest before fall to see how things look. As far as “N”…..that just depends on how much yield your trying to produce. You can add anywhere from a little to a lot depending on your budget.