Are you looking for another crop to diversify your crop rotation but not sure how you will market this product? Consider using this website as your information portal to a large array of possibilities. Information includes a list of alternative crop/products along with the associated production requirements, marketing and processing links. The marketing information and links go far beyond grain crops but also includes a wide array of other agricultural products.
If you have proven salinity issues, utilize this link to learn the salinity tolerances of a wide array species to help design a mixture that will work.
This link provided by NDSU Extension very briefly runs through a large array of feed products utilized for ruminants. The array of feed possibilities listed have a very blunt description. Then, theres a large table describing the feed attributes commonly associated with that product.
If you would like to run some standard soil tests on your operation, check out this NRCS link. It gives a complete and simple guide on quantifying your soil characteristics.