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Relationship Between Soil Water-Stable Aggregates and Physico-chemical Soil Properties  

Hyun, Byung-Keun (National Institute of Agricultural Science and Technology)
Jung, Sug-Jae (National Institute of Agricultural Science and Technology)
Song, Kwan-Cheol (National Institute of Agricultural Science and Technology)
Sonn, Yeon-Kyo (National Institute of Agricultural Science and Technology)
Jung, Won-Kyo (National Institute of Agricultural Science and Technology)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.40, no.1, 2007 , pp. 57-63 More about this Journal
Abstract
Soil aggregation has been considered as an important factor not only for increasing soil productivity and soil quality but also improving nutrient use availability and water use efficiency. However, the relationship between soil aggregation and soil properties hasn't well reported for Korean soils. Objective of this research was to identify the relationship among soil water-stable aggregate (WSA), soil properties and soil dispersion ratio. Soil samples were analyzed for water-stable aggregate, Middleton's dispersion ratio, and soil physical and chemical properties. Water-stable aggregate was significantly correlated to soil textural properties, soil organic matter, and exchangeable cations. Middleton's dispersion ratio was significantly correlated with water-stable aggregate ($r=-0.76^{***}$). Regression equation for water-stable aggregate was estimated by Middleton's dispersion ratio (Y=-0.79X + 96.49; $r^2=0.58^{**}$). In this research, we conclude that water-stable aggregate was significantly correlated with some soil properties and was able to be estimated by rapid and easily measurable Middleton's dispersion ratio.
Keywords
Water-stable aggregate; Middleton's dispersion ratio; Soil aggregate;
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