Broadcast corn starter vs 2x2

Nitrogen loss will be more from a broadcast surface application relative to 2x2 or in-furrow application so if you go that route I'd add a nitrogen stabilizer containing NBPT (i.e. FBN Nitrogen Stabilizer/Agrotain Ultra). If your starter just contains N, you should be ok broadcasting it as long as you stabilize it. Also, the P in a surface fertilizer app will get tied up/bound in the surface soil very quickly with very little likelihood of moving into the root zone this season. An in-furrow starter or 2x2 gets the P into the rootzone and more immediate impact versus waiting for P to get to where it needs to be. P doesn't leach into the rootzone like N.