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Sunday, April 22, 2018

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4666. Mulla, D.J.. 1988. Estimating spatial patterns in water content, matric suction, and hydraulic conductivity.. Soil Sci. Soc. Am. J. 52:1547-1553.
Surface temperature, water content, penetrometer resistance, sand content, and clay content were measured every 5 m. on two transects in a Palouse-Thatuna silt loam soil. The study intended to develop rapid methods for estimating the spatial patterns of soil water content, matric suction, and hydraulic conductivity. Classical statistics and semivariograms were both used. Soil temperature was found to be more consistently correlated to water content than was penetrometer resistance. Texture-based estimates of matric suction and hydraulic conductivity were comparable to those obtained by laboratory methods when spatial patterns were compared, but not when absolute values were compared. Differences in bulk density probably account for this. Thus, the texture-based method is a quick and acceptable approach if spatial patterns in the parameters are the main concern, but laboratory methods are preferred for making accurate absolute measurements.

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