A new crop is ready to sprout on Illinois farms, with gleaming solar panels supplanting rows of corn and soybeans. Drawn by new state requirements and incentives, renewable energy developers are staking out turf on the rural fringes of the Chicago area and beyond, looking to build dozens of solar farms to feed the electric grids of Commonwealth Edison and other utilities. It’s a potential sea change in the Illinois energy landscape that proponents say is long overdue and will provide customers with a green power alternative. But the rise of solar power also has generated opposition from some residents over everything from changing landscapes to toxicity concerns.The fledgling solar energy boom is driven by the Future Energy Jobs Act, which took effect last year and requires Illinois utilities to get 25 percent of their retail power from renewable sources like solar and wind by 2025.