Several farmers in North Dakota, Minnesota, and northern South Dakota are still behind with their spring planting duties due to excessive wet conditions.  The date has passed for full crop insurance coverage, and farmers are worried that corn and soybeans planted this late may not fully mature, especially if an early frost were to occur.  South Dakota State extension agronomist Jon Kleinjan says many are needing feed for livestock, so they are turning to planting sorghum.  He says the further north you go, the worst is the problem.  The SDSU agronomist says sorghum is perhaps the best option, especially at this late stage.  He says many farmers may have to settle on having prevented planted acres.  Kleinjan suggests farmers visit with their crop insurance agent for additional information regarding coverage.