Cover Crops seem to be a hot topic for 2012. I was going to give you a link to January Prairie Farmer but it is not posted. The good news in the article is that NRCS is helping cost share on an annual commitment.
I hope you get a chance to read more. Dan Towery is one of the best agronomists I know. He is a big believer especially in Annual Ryegrass.
Using legume cover crops is a great way to protect your soil and get some "free" nitrogen as well. Keep in mind that in order to maximize nitrogen recovered from legumes, no-till is the way to go. Tilling adds oxygen to the soil and speeds up nitrification and de-nitrification.
Grass cover crops my have advantages to your operation. Here is a link to using Annual Ryegrass cover crops. Tillage radishes are great in No-till situations. Penn State has some great results with Tillage Radishes.
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