The American Farm is in the midst of a tech revolution. We talk to engineer Calden Carroll who is working on a nitrate sensor that would alert farmers when and when not to fertilize their fields. Next we hear from 66 year old farmer Gary Niemeyer who has turned to “precision agriculture” equipment to plant and harvest his corn and soybean fields. Plus, we hear from award winning journalist Vince Beiser. He wrote a piece for Pacific Standard magazine about the ways Big Data is changing how Americans grow food, and whether farmers should be concerned.