Unless you are planting very large areas with corn, We find sowing seed into trays is the best method. If you have very free draining silty loam soil, then you may be able to direct sow your seed. The corn seed can be scattered into your seed trays, and then when the tops are around 2-6cm high, carefully tease the plants out and transplant so that the tips are barely showing above ground. Or it can be sown in a triangulated pattern in the seed tray.
Corn responds very well to Seedling Innoculant.
All kinds of corn need deep, free draining, fertile soil. The better the soil is, the taller the plants will be and the more tillers and cobs they will produce. Corn is a gross feeder like the brassicas and silverbeet, the more manure there is around the better! I usually give my corn liquid comfrey. cow manure etc. after it gets to around 30cm high and again around 40cm high. They are less likely to blow over in a storm if you hill them up at 30cm high as well plant corn two rows in a metre wide bed, with the rows 60cm apart, and the plants 20cm apart in the rows.
Corn must be planted in blocks rather than long single rows for pollination. Traditionally it was grown in hills with several plants together. Raised beds is great with two rows in a bed and if you have a large number of plants to grow, plant in blocks for best pollination.
Photo credits Gail Aiken, Koanga Institute and Vitor Crispim, Regeneration Productions