MLRA 105 - Northern Mississippi Valley Loess Hills Illinois, Iowa, Wisconsin, and Minnesota. 57,520 km2 (22,210 mi2)

Water:
In most years the moderate precipitation is adequate for crops and forage, but in years of little or no precipitation, yields on thin soils over bedrock are reduced. Ground water is abundant in outwash deposits in the valleys, but the amount varies on the uplands. The supply of ground water in areas underlain by sandstone and limestone generally is moderate. The many springs, streams, and farm ponds are additional sources of water.

12/16/98