Kansas as Art

"Farmers in this region have adopted a more efficient irrigation method, central pivot irrigation, to conserve water from the Ogallala Aquifer. The method draws water from a single well in a field’s center, and uses long pipes perched on wheels that rotate around the pivot, showering the crops with water. Because the water falls directly on the crops instead of being shot into the air as occurs with traditional sprinklers, less water is lost to evaporation and more goes to nourishing the growing plants. The circular field shapes are a byproduct of the method. The fields shown here are up to one mile (1.6 kilometers) in diameter."
From Space.com via BLDGBLOG.

[unrelated: Could someone suggest to me how you cause a something in the blockqoute tag to have a different background color than the body text?]