Studies carried out by a team of scientists at the Indian Institute of Spices Research (IISR) have revealed high levels of phosphorus in the soil samples from Kozhikode and Wayanad districts.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/phosphorus-toxicity-found-kozhikode-wayanad-soils
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-line-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/toxicity-studies
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/toxic-wastes
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kozhikode-d
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wayanad
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kerala
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/soil-capability
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/soil-resources
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/research-agencies
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/chemical-fertilisers