so question for the oats experts. When would an oats plot die off and be done. Is oats one of the plots you can plant to improve your soil conditions?
No, you need a legume to improve your soil. There are several varieties of peas and clovers that will put nitrogen back in the soil. Oats won't die until they head out in late May.
Edit for the hard freeze-I'm in Mills county and while we haven't planted every year, we've never lost a complete stand of oats due to a freeze in 38 years.