Madhya Pradesh has maximum 25 lakh 82 thousand hectares under organic farming in the country. This is about half of total organic farming area in India.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/mp-maximum-area-under-organic-farming-country
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/central-chronicle-bhopal
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/madhya-pradesh
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/organic-farming
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/farmers