soil maps

Progress in Soil Geography I: Reinvigoration
Miller, B.A., E.C. Brevik, P. Pereira, and R.J. Schaetzl. Progress in Soil Geography I: Reinvigoration. Progress in Physical Geography: Earth and Environment 43(6): 827-854. doi: 10.1177/0309133319889048. Read More

25 August 2022
Iowa Soil Drainage Class Maps [gSSURGO]
“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… Read More

22 July 2019
Iowa Depth to Water Table 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… Read More

22 July 2019
Iowa Soil pH 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… Read More

22 July 2019
Iowa Soil Saturated Hydraulic Conductivity (Ksat) Maps [gSSURGO]
Saturated hydraulic conductivity (Ksat) refers to the ease with which pores in a saturated soil transmit water. The estimates are expressed in terms of micrometers… Read More

22 July 2019
Iowa Soil Clay Content Maps [gSSURGO]
Clay as a soil separate consists of mineral soil particles that are less than 0.002 mm in diameter. The estimated clay content of each soil… Read More

22 July 2019
Iowa Soil Silt Content Maps [gSSURGO]
Silt as a soil separate consists of mineral soil particles that are 0.002 to 0.05 mm in diameter. In the database, the estimated silt content… Read More

22 July 2019
Iowa Soil Sand Content Maps [gSSURGO]
Sand as a soil separate consists of mineral soil particles that are 0.05 mm to 2 mm in diameter. In the database, the estimated sand… Read More

22 July 2019
Iowa Soil Water Content – 15 Bar Maps (wilting point) [gSSURGO]
Water content, -15 bar, is the amount of soil water retained at a tension of -15 bars, expressed as a volumetric percentage of the whole… Read More

22 July 2019
Iowa Soil Water Content – 1/3 Bar Maps (field capacity) [gSSURGO]
Soil water content at -1/3 bar is the amount of soil water retained at a suction tension of 1/3 bar, expressed as a volumetric percentage… Read More

22 July 2019