Biswanath Chariali centre is located in middle Brahmaputra plain eco-sub region (AESR 15.2). The climate is hot humid. Annual normal rainfall is 1990 mm. The length of growing period is 240 to 270 days. Seasonal flooding and water logging is common which demands special selection for normal crop husbandry.
The program is being implemented in the village Chamua Narayanpur in Lakhimpur district, Assam. The total cultivated area is 133 ha which is entirely rainfed. The mean annual rainfall is 1987 mm with seasonal rainfall of 1262 mm during kharif (June- September). The major soil types are Inceptisols (sandy loam to silty clay loamy with pH ranges from 4.65 to 6.38). The major crops during kharif under rainfed are Sali rice, sesame, blackgram, greengram, summer vegetables etc and in rabi are rapeseed, potato, winter vegetables etc. The numbers of small, marginal, medium and large farmers are 41, 65, 19 and 0, respectively.
Normal and actual (2012) monthly rainfall at Chamua Narayanpur
Normal and actual (2012) monthly rainfall at Biswanath Chariali