There is a heated discussion below about quadcopter vs. fixed wings for agricultural applications and I mentioned I would write up how Agribotix selected the RV Jet as an airframe.
Briefly, a fixed wing is roughly five times more efficient than a quadcopter for a given weight and configuration (approximated by the glide ratio and validated through our experimentation). Since farmers typically work in quarter and half sections throughout the Midwest, this means the airframe should be capable of surveying 320 acres, which is practically possible only with a fixed wing.
However, all fixed wings are not equal. A flying wing is much more durable than a traditional airframe, in addition to packing smaller and being easier to set up and tear down. We experimented with a number of different flying wings, but found the best overall characteristics to lie with the RV Jet. If you're interested in more details, take a look at our blog post over at http://agribotix.com/blog/2014/5/26/the-agribotix-journey-towards-selecting-an-airframe