@article{marion_spatial_1990,
	title = {Spatial variability of {CaCO}3 solubility in a {Chihuahuan} {Desert} soil},
	volume = {4},
	abstract = {Spatial variability in CaCO3 solubility is an important factor in parameterizing simulation models and designing experiments.  The objective of this study was to quantify the spatial variability, both horizontal and vertical, in CaCO3 solubility in a Chihuahuan Desert soil.  CaCO3 solubilities were estimated in 1:5 soil:water suspensions.  Soil horizon extracts were generally supersaturated with respect to calcite.  The mean (+- \textit{1 SE}) p\textit{IAP}(CaCO3) for the A, B$_{\textrm{k1}}$, and B$_{\textrm{k2}}$ horizons were 8.03 (0.055), 8.19 (0.019), and 8.26 (0.15), respectively.  The differences in p\textit{IAP} between the A and B horizons (vertical variability) were statistically significant;  these differences could be due to organic matter inhibition of calcite precipitation.  Supersaturation with respect to calcite and vertical variability in CaCO3 solubility needs to be explicitly considered in simulation models.  The standard errors in p\textit{IAP} (horizontal variability) were greatest for the A horizons and decreased with increasing soil depth.  Given the inherent variability in CaCO3 solubility, a large sample size is necessary to detect small differences in CaCO3 solubility for this Chihuahuan Desert soil.},
	journal = {Arid Soil Research and Rehabilitation},
	author = {Marion, G.M. and Schlesinger, W.H. and Fonteyn, P. J.},
	year = {1990},
	keywords = {JRN, soil, calcium carbonate}
}

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