Wheat, rice, sugar, cotton and maize are among the essential internationally traded crops in the global economy.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/11-percent-disappearing-groundwater-used-grow-internationally-traded-food
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/eurek-alert
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wheat
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rice
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maize
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cotton
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/irrigation
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/trade