I have to be honest, I have no idea what is going to happen with the unveiling of Friday's USDA report. This is why using an option strategy like the ones I recommended last month are so useful. They can take a lot of pressure off ahead of reports such the one on Friday. You would already be quite a bit further ahead had you followed this strategy on corn or soybeans and you shouldn't have much concern over what is contained in the report. You are making money either way.
The best "option" I can see for now are near dated put options..... just something to get you past the report for a few weeks. Just to keep it simple, I am recommending May $3.55 corn and $9.70 soybean puts. The advantage is that if the market report is bullish, you will have left your upside opened. The downside is really just the cost of the option. The total cost of the corn option net of commissions will be about .07 where the total cost of the bean option net will be about .185. I am recommending the near term month because there is just no volume or open interest to go out to Dec on a serial put and they would cost twice as much. We could look at other things you could do to reduce costs, such as making the position a bear put spread. If you want to do something like that, I suggest you contact me.