Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/effects-residue-decomposition-productivity-and-soil-fertility-ricewheat-rotation
[2] http://admin.indiaenvironmentportal.org.in/category/author/yadvinder-singha
[3] http://admin.indiaenvironmentportal.org.in/category/author/bijay-singha
[4] http://admin.indiaenvironmentportal.org.in/category/author/j-k-ladha-et-al
[5] http://admin.indiaenvironmentportal.org.in/category/journal/soil-science-society-america-journal
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/soil-capability
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indo-gangetic-plains
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-fertilisers
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rice
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wheat
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/crop-residues
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/green-house-gases
[15] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ludhiana-d