Epiaquept KR
A soil profile of an Epiaquept used for paddy rice production in South Korea. Compaction of the upper part of the soil facilitates puddling with irrigation water so that areas remain flooded while the crop matures. The gray colors between depths of about 15 and 30 cm are caused by the human-induced wet soil conditions, which in turn result in the chemical reduction of iron in the upper part of the soil. This soil has an ochric epipedon about 15 cm thick underlain by a cambic horizon that extends below the base of the photo. The right side of the profile has been smoothed; the left side retains the natural soil structure.
Epiaquepts have one or more layers in the upper part of the profile that are saturated for part of the year and underlain by unsaturated layers (a perched water table). They have cool to warm soil temperatures. Before cultivation, most Epiaquepts supported forest vegetation. Epiaquepts are generally nearly level or gently sloping, and their parent materials are typically late-Pleistocene or younger sediments
(Soil Survey Staff. 2015. Illustrated guide to Soil Taxonomy. U.S. Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center, Lincoln, Nebraska)
For additional information about soil classification, visit:
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/cla...
Epiaquept KR
A soil profile of an Epiaquept used for paddy rice production in South Korea. Compaction of the upper part of the soil facilitates puddling with irrigation water so that areas remain flooded while the crop matures. The gray colors between depths of about 15 and 30 cm are caused by the human-induced wet soil conditions, which in turn result in the chemical reduction of iron in the upper part of the soil. This soil has an ochric epipedon about 15 cm thick underlain by a cambic horizon that extends below the base of the photo. The right side of the profile has been smoothed; the left side retains the natural soil structure.
Epiaquepts have one or more layers in the upper part of the profile that are saturated for part of the year and underlain by unsaturated layers (a perched water table). They have cool to warm soil temperatures. Before cultivation, most Epiaquepts supported forest vegetation. Epiaquepts are generally nearly level or gently sloping, and their parent materials are typically late-Pleistocene or younger sediments
(Soil Survey Staff. 2015. Illustrated guide to Soil Taxonomy. U.S. Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center, Lincoln, Nebraska)
For additional information about soil classification, visit:
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/cla...