Mustards belong either to the Brassica or Sinapsis genera. Mustards are upright cool-season annuals that grow 3-5 feets tall. They have narrow leaves, yellow flowers, a strong taproot, and fibrous and lateral roots.
Scroll through the pages or search to find the cover/cash crop of interest
Tim Harrigan, Dale Mutch, and Sieg Snapp- Michigan State University