GPS

Researchers say the Global Positioning System, which helps drivers navigate the roads and which monitors tiny movements of the earth's surface as a possible indicator of developing earthquakes, has measured the huge loss of water due to severe drought in the West, says National Geographic.

Row-crop cultivators are being put to work because of the emergence of herbicide-resistant "super weeds," says DTN, "something of a renaissance" for mechanical weed control. Cultivators went into decline with adoption of limited-tillage and herbicides.