English: I retrieved the soil pH maps from [1]. In GIMP 2.4.3 I used the "Select by Color Tool" (threshold 15.0) to create pH-specific maps. Note that the original maps do not indicate actual pH values in the pH scale. For soils with acidic pH, I included the colors indicated by the leftmost 14 bars in the pH scale, ranging from red to pink. For soils with basic pH, I included the colors indicated by the rightmost 6 bars on the pH scale, ranging from light blue to blue. For soils with neutral pH, I included the remainder of the bars on the pH scale, which included very light pink, white, and very light blue. I then referenced these pH-specific maps to draw regions of differing soil pH on File:BlankMap-World6.svg. Because the original maps from Atlas of the Biosphere and File:BlankMap-World6.svg use different map projections, some ambiguity was introduced into this map. Thus it can only be taken to represent basic trends in soil pH, not precise boundaries.
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Captions
A map of soil pH showing acidic soils in red, neutral soils in yellow, and basic soils in blue.
Un mapa del pH del suelo que muestra los suelos ácidos en rojo, los suelos neutros en amarillo, y los suelos básicos en azul.
{{Information |Description={{en|1=I retrieved the soil pH maps from [http://www.sage.wisc.edu/atlas/maps.php?datasetid=20&includerelatedlinks=1&dataset=20 Atlas of the Biosphere]. In GIMP 2.4.3 I used the "Select by Color Tool" (threshold 15.0) to create
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