 The main things I've measured so far, just trying to track the carbon-nitrogen ratio of our cover crops. So we can capitalize on some of that mineralized nitrogen because most of our fields that have cover crops will see a corn crop the next year. And so we're trying to use the cover crops to displace some inorganic nitrogen inputs. Gotcha, so taking it after storing it. So right now I'm just kind of tracking carbon-nitrogen ratio but also looking at the other micro and macro nutrients within the cover crop and giving them a credit almost like looking at manure and giving it a credit. To make any management we have to take into account the cost of our cover crop seed and what it costs to seed but I'm looking at it that will offset those expenses with reductions in applied inorganic fertilizer. That's my goal for the farm. Our goal is to bring our level of applied inorganic fertilizer, reduce it by 40 to 50 percent. That would be a good goal. It's an ambitious goal but I think it's very attainable. There's a little bit of perception that this is messy farming or that something's going to be a weed but once you kind of see how well the cash crops do after it I think that perception goes away.