Acute encephalitis syndrome (AES) is caused by a wide range of viruses and bacteria. Japanese encephalitis (JE) is considered as a main viral aetiology of patients with AES in Assam. In the year 2006, West Nile (WN) virus emerged as another cause of encephalitis in this part of the country. In the year 2008-2010, we investigated 550 patients with AES admitted to nine Government and private hospitals representing 14 districts of Assam. Two hundred and fifty nine patients were identified as positive for JE virus and 56 patients for WN virus.

In the present investigation, impact of different tillage options on wheat yield has been evaluated for various locations of IGP region. In general, more increase in wheat yield was observed was observed in zero tillage when compared with conventional tillage.