Seems a little strange to see a post like this at this time of yr but its good to have the info you need ahead of time.
LOTS of sweet corn grown in this area commercially. In all the yrs I've lived here, I've never heard of compass heading being of any importance.
Row spacing is all going to depend upon with what you are going to cultivate with. Width of cultivating implement plus 18-24 inches would be the way to go if you have the space and how far along the corn is. I typ plant 3' or 4' apart depending upon how I'm going to cultivate. What I can use depends upon if we're talking say knee high and is different than if I need to culitvate when the crop is 4-6 ft high.
You've not said how big a plot you will be planting or the size of your cultivating implements. I've grown sweet corn in a family sized garden and have always used a tiller. Depending upon weed growth, you may need to cultivate after the corn has some growth to it and that may dictate the kind and size of the equipment.
Yea, I know it's way early for thinking about planting corn in Illinois, but I just got my new, used plow and am on the lookout for a 1-row planter, so I'm like a kid dreaming about the school picnic on the first day of school :laughing:
BTW - my new neighbor just moved here from Hawaii, and he's a guru for Monsanto. He ran a corn-experimenting project over there. He told me Hawaii is the only US State where you could plant corn in 1 field and harvest it in an adjacent feild -
ON The Same Day 
Their growing season is year around!
Plot/s: I'm figuring on two or three, will plow one this fall and let it sit till spring and then disk it and plant. The other two will be used for rotating the corn - plant a different plot every three years and grow some type of cover-crop in the fallow ones. I'm thinking 50' x 50' and maybe make 3 different plantings to stagger the harvest.
I'll be planting Bodacious Sweet Corn - anybody happen to know which JD Type-B plate to use?
Cultivation: Currenty, I do not have a cultivator, but can have one custom-made for a reasonable price... I'll be watching the local Craig's List for a cheap one this winter. I have a 5-hp Simplicity Tiller that cuts 16" wide. That thing is bullet-proof (starts on 2nd or 3rd pull even after sitting all winter) I'll most likely be buying a 1-row JD 71-Flex planter so I can adjust my row widths easily for different type crops.
Thanks for all the replys and help... I appreciate every one! :thumbsup: