Projected (Spring) Price/Harvest (Fall) Price: 

http://prodwebnlb.rma.usda.gov/apps/PriceDiscovery/GetPrices/YourPrice


TOOLS:

Soybean Margins Calculator
http://www.agweb.com/soybean_calculator.aspx

Corn Margins Calculator
http://www.agweb.com/corn_calculator.aspx