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 soil material. Water retained at -15 bars is significant in the determination of soil water-retention difference, which is used as the initial estimation of available water capacity for some soils. Water retained at -15 bars is an estimation of the wilting point. Water content varies between soil types, depending on soil properties that affect retention of water. The most important properties are the content of organic matter, soil texture, bulk density, and soil structure.

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