I think there's a big parallel here with respect to drying grain. It's much like our fertilizer program. In the fertilizer realm, we're talking about four R's—the right place, the right time, the right placement....
With respect to grain drying, it is very critical to focus on psychrometrics. It's all about air temperature and relative humidity, because as you're moving air through the grain, it has to be at a lower relative humidity to pull moisture out. I don't think many farmers understand yet that it's the same type of principle here. You have to use the right air source at the right time in order to conserve power and have the lowest energy bill possible.
We could do a lot of things in terms of passive drying and passively collecting heat from the sun. A little experiment I did on the farm was to just heat the air using the sun before it went into the aeration fan rather than using any propane or other supplemental heat. By doing so, I was able to lower the relative humidity of the air going through the grain.
There are options; we just haven't been thinking about them.