Plants and Pulses of Polarized Light

So farmers can save money on water and fertilizer? Sounds like a good technology. I wonder if they will be able to put it in a helicopter and pain the entire crop to compose a full field analysis, some area's might need more fertilizer or water than others.

I tried this as a kid except with ants and a magnifying glass. I learned a lot about optics, plus having a death ray that nothing can escape is pretty cool.