This raster is a highly detailed map of geologic materials at the surface (delineations made from maps at 1:24,000 to 1:12,000 scale). The smaller extent maps were merged together by USDA-NRCS to produce the gSSURGO spatial database, covering the entire state of Wisconsin at a 10m resolution. The gSSURGO map was then interpreted by Iowa …Continue reading “Surficial Geology of Wisconsin”
This raster is a highly detailed map of geologic materials at the surface (delineations made from maps at 1:24,000 to 1:12,000 scale). The smaller extent maps were merged together by USDA-NRCS to produce the gSSURGO spatial database, covering the entire state of Michigan at a 10m resolution. The gSSURGO map was then interpreted by Iowa …Continue reading “Surficial Geology of Michigan”
This raster is a highly detailed map of geologic materials at the surface (delineations made from maps at 1:24,000 to 1:12,000 scale). The smaller extent maps were merged together by USDA-NRCS to produce the gSSURGO spatial database, covering the entire state of South Dakota at a 10m resolution. The gSSURGO map was then interpreted by …Continue reading “Surficial Geology of South Dakota”
This raster is a highly detailed map of geologic materials at the surface (delineations made from maps at 1:24,000 to 1:12,000 scale). The smaller extent maps were merged together by USDA-NRCS to produce the gSSURGO spatial database, covering the entire state of Minnesota at a 10m resolution. The gSSURGO map was then interpreted by Iowa …Continue reading “Surficial Geology of Minnesota”
This raster is a highly detailed map of geologic materials at the surface (delineations made from maps at 1:24,000 to 1:12,000 scale). The smaller extent maps were merged together by USDA-NRCS to produce the gSSURGO spatial database, covering the entire state of Ohio at a 10m resolution. The gSSURGO map was then interpreted by Iowa …Continue reading “Surficial Geology of Ohio”
This raster is a highly detailed map of geologic materials at the surface (delineations made from maps at 1:24,000 to 1:12,000 scale). The smaller extent maps were merged together by USDA-NRCS to produce the gSSURGO spatial database, covering the entire state of Indiana at a 10m resolution. The gSSURGO map was then interpreted by Iowa …Continue reading “Surficial Geology of Indiana”
This raster is a highly detailed map of geologic materials at the surface (delineations made from maps at 1:24,000 to 1:12,000 scale). The smaller extent maps were merged together by USDA-NRCS to produce the gSSURGO spatial database, covering the entire state of Illinois at a 10m resolution. The gSSURGO map was then interpreted by Iowa …Continue reading “Surficial Geology of Illinois”
“Drainage class (natural)” refers to the frequency and duration of wet periods under conditions similar to those under which the soil formed. Alterations of the water regime by human activities, either through drainage or irrigation, are not a consideration unless they have significantly changed the morphology of the soil. Seven classes of natural soil drainage …Continue reading “Iowa Soil Drainage Class Maps [gSSURGO]”
“Water table” refers to a saturated zone in the soil. It occurs during specified months. Estimates of the upper limit are based mainly on observations of the water table at selected sites and on evidence of a saturated zone, namely grayish colors (redoximorphic depletions) in the soil. A saturated zone that lasts for less than …Continue reading “Iowa Depth to Water Table Maps [gSSURGO]”
Soil reaction is a measure of acidity or alkalinity. It is important in selecting crops and other plants, in evaluating soil amendments for fertility and stabilization, and in determining the risk of corrosion. In general, soils that are either highly alkaline or highly acid are likely to be very corrosive to steel. The most common …Continue reading “Iowa Soil pH Maps [gSSURGO]”
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