"This still leaves a lot of options open depending on the anticipated date of seeding. Seeding summer annuals like sudangrass, sorghum sudan, pearl millet, and Japanese millet in July are great options but will be adversely affected by the first fall frost. I've heard seed supplies are tight for these summer annuals," says Licht.
One of his favorite options at this point is winter rye or winter triticale
If you wait longer yet to seed (say August) you can plant a 'normal' cover crop of cereal rye, tillage radish, purple top turnips, etc., says Licht. "But these leave the soil open and susceptible for erosion for too long. Not to mention weed growth. Tillage radish would help with compaction issues but I don't see that being problematic on prevented planting acres.
"At this point, in mid-to late June, one of my favorite options is probably a winter rye or winter triticale," he says. "It can be seeded now but won't go to seed in 2013. It will overwinter then can be killed in the spring of 2014 before planting the main crop. It will overwinter better if it gets mowed in mid-August. Without a mowing in mid-August it will overwinter but will not be as winter hardy. This option limits that ability to apply fall nitrogen but your operation relies heavily on spring preplant nitrogen and in-season nitrogen. Any nutrients the rye or triticale takes up would be returned after a spring burn down or fall tillage."