This quarry exposure was photographed in Lancaster County, Nebraska. The soil is formed in loess, to a depth of about 150 cm over glacial till. The till is unoxidized, grey color except around oxidized cracks that are filled with white CaCO3 illuviated from the solum. No plow layer is evident at this site but these soils are extensively used for corn and small grains. However, unreliable rainfall during the summer growing season threatens yields in most years unless supplemental irrigation is available.