"Wheat was the earliest and most important cash crop for white settlers in Wisconsin. It required a small initial capital investment and was fairly easy to grow, allowing farmers to harvest two crops a year. The high rate of financial return made wheat an especially attractive crop for homesteaders during the middle of the 19th century."
If you live in western Wisconsin and would like to pursue a career in Agriculture, this libguide will give you a great start. There is a wealth of information out there, just take your time, explore and have fun.