To trade corn, here are the things u must research
1) Weather. Weather drives the grain market. after all, rain grows grain
2) Seasonal. Planting season begins during the month of march (southern states), april (some midwest states and east coasts), may (midwest). Pollination season begins in june - sept. harvest season begins in sept (southern states) oct-nov (midwest and east coast). farmers sell corns starting in dec.
3) Must understand between old crop months and new crop months
4) Supply/demand. must keep track of USDA supply/demand estimate.
5) Must know the storage cost, interest rate, basis, ratio, etc
6) Must keep an eye in the cattle and hogs markets. 80% of corn are sold to cattles feedlot.
7) Must keep an eye on other grain such as wheat and beans. They are substitute for corn.
8) Must pay attention on south america (argentina and brazil) supply/demand and weather. Their planting season begins in november.
9) Must control your emotion when there is a limit up or down
Hope this help