Keith Wendte asks himself the same question every time he makes an adjustment on his family’s Effingham County, Ill., farm: Is this providing a return on investment?

In a recent entry on The Mitchell Farm Web site (www.mitchellfarm.com), I wrote that “effectiveness comes from getting the one piece of information necessary to make a decision and leaving the rest unseen.” I was referring to how easy it is to get smothered in GPS field-generated data, but often not knowing how to put it to work.