While the corn is standing the some deer will spend all day in there. The best way to hunt a standing cornfield IMO is to get upwards of 3-5 people and spread out about 40 yrds or so apart along one edge of the field. The first hunter enters the corn by sticking his head into the first row and looking both ways. His bow is kept back by his hip as he does this. Once the first hunter gets in about 5 rows the second hunter starts the same and so on down the line till all hunters are in the corn. If one hunter sees a deer he should get a shot but if not the next hunter coming up should. This practice is safe as long as you shoot down the row you are in (never do this with guns). After you all reach the end of the field you start over again 40 yrds further down from the last hunter to exit the field.
As far as a cut corn field, my choich would be a stand along an inside corner.