Soil pH regulates the capacity of soils to store and supply nutrients, and thus contributes substantially to controlling productivity in terrestrial ecosystems . However, soil pH is not an independent regulator of soil fertility—rather, it is ultimately controlled by environmental forcing. In particular, small changes in water balance cause a steep transition from alkaline to acid soils across natural climate gradients.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/water-balance-creates-threshold-soil-ph-global-scale
[2] http://admin.indiaenvironmentportal.org.in/category/author/e-w-slessarev
[3] http://admin.indiaenvironmentportal.org.in/category/author/y-lin
[4] http://admin.indiaenvironmentportal.org.in/category/author/n-l-bingham-et-al
[5] http://admin.indiaenvironmentportal.org.in/category/journal/nature
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/soil-capability
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/soil-science
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rainfall-pattern
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/soil-erosion