Aquic soils

Yu H, Xi B, Ma W, Li D, He X. Fluorescence spectroscopic properties of dissolved fulvic acids from salined flavo-aquic soils around Wuliangsuhai in Hetao Irrigation District, China. Soil Sci. Soc. Am. J. 2011 75 1385-1393. 

Bouma, J. (1983). Hydrology and soil genesis of soils with aquic moisture regimes. In "Pedogenesis and Soil Taxonomy I. Concepts and Interactions" (L. P. Walding, N. E. Smeck, and G. F. Hall, eds.), pp. 253-281. Elsevier, Amsterdam, The Netherlands. 

Soil used in the alachlor persistence studies and in the enrichments for alachlor-degrading organisms was derived from two sources a waste site at an agrochemical facility in Piatt Co., IL and a soybean plot near the waste site that was divided into replicated blocks for a land application study (24.) The soil type was a mixture of Ipava silt loam (fine, montmorillonitic, mesic, Aquic Argiudolls) and Sable silty clay loam (fine silty mixed, mesic, Typic Haplaquolls) with pH 5.4-5.5. The soil at the waste site had been excavated and stored in piles which were sampled as needed for laboratory studies (waste-pile soil). Untreated check plots in the soybean field served as sources of uncontaminated soil (CHECK soil). Soils were stored at 2-4°C and passed through a 3-mm screen before use. 

Soil moisture regime dry to aquic. Major soil property featureless soil bodies. Diagnostic horizons typically absent, albic. Epipedon ochric. Characteristics little or no evidence of soil development. Description recently formed soils such as land surfaces that are very young (e.g., alluvium, colluvium, mudflows), extremely hard rocks, sandy parent material, disturbed material (e.g., mined land, highly compacted soils, or toxic material disposal). Exhibit A/C or A/R profiles. May have an Ap horizon. 

Ultisols Aquults Vegetation forest. Climate occur in any soil temperature regime. Soil moisture Udults regime precipitation greater than evapotranspiration, xeric to aquic. Major soil Ustults property low base saturation. Diagnostic horizons argillic, kandic, albic. 

The concentrations of humic and fulvic acids vary considerably from soil to soil, but are closely related to the total organic matter content in the soil. Soil organic matter in well-drained soils ranges from as little as 1.0 wt% or less in coarse-textured soils (Psamments) to more than 6.5 wt% in prairie grassland soils (e.g., Hapludolls) (Soil Survey Staff 1975). Poorly drained mineral soils (aquic suborders), including hydric soils in wetlands, often... 

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