some of the Agricultural Libraries:

Holistic Agriculturae Library
http://www.soilandhealth.org/01aglibrary/01aglibwelcome.html

Agriculture Network Information Center
http://www.agnic.org/

Tamil Nadu Agricultural University Library
http://www.tnau.ac.in/lib/index.html

University Library G. B. Pant University of Agriculture & Technology, Pantnagar
http://www.gbpuat.ac.in/library/index.htm

Indian Agricultual Research Institute Library
http://www.iari.res.in/index.php?option=com_content&view=article&id=221&Itemid=518

Indian Agricultural Statistical Research Institute, New Delhi
http://lib.iasri.res.in/