Figure 2: Soil surface prediction models illustrating the spatial pattern of the properties: soil pH, exchangeable sodium (Na), calcium (Ca), magnesium (Mg),  and organic matter (OM). Coordinates are in Universal Transmercator units. Location of sample sites are indicated by filled triangles and values at these sites are actual. Estimates were derived for the geographic center of each cell and mapped at a scale representing a 2x2 km area. Sample sites outside the prediction boundaries represent samples used in statistical modeling investigation but not in the pattern analysis investigation.

 
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