Spatial trends in the texture, moisture content, and pH of a Virginia coastal plain soil
1997
Soil texture, moisture content, and pH data from an agricultural field area of 48 × 32 m in a Suffolk sandy
loam soil in the Virginia Coastal Plain was examined for spatial trends. Trend surface analysis of sand, silt, and clay
content data (n = 35) found that 68%, 74%, and 31% of the total variability in sand, silt, and clay content, respectively,
was explained by second-order trend surfaces. Soil moisture content and pH also exhibited spatial trends, which resulted
in statistically significant differences between subsurface moisture content and pH in two 18 × 27 m subplots within the
study area. Both moisture content and pH trends had some similarity to the trend for clay content. The spatial trends in
these soil properties, however, did not translate directly into spatial trends in depth to center of bromide mass, indicating
the influence of other factors in the variability of chemical distribution in the soil.
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