The paper says that since economic reforms began in early-1990s, about three million hectare of arable land has been lost during the study period.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/maharashtra-among-states-highest-loss-agricultural-land-says-iim-paper
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-mumbai
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/land
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-institute-management-iim
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamil-nadu
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bihar