Am thinking about what we could effectively grow here as a double crop after harvesting wheat and before planting corn the following year.  I would also like to build up the soil organic matter on some of the farms.  I've read that sorghum-sudangrass might be a good choice, as it puts down deep roots and is fairly drought resistant.  I'd probably make one cutting then chop/shred the rest after frost.

Anyone in the Plains do this, and if so, what have been your results?  Double-crop soybeans are "iffy" here, with lack of moisture being an issue.  Thanks.