Potato is one of the most important and widely cultivated vegetable crops of Assam and ranks fourth in terms of acreage under individual crop in the state. Lower Brahmaputra valley Zone of Assam which comprised the district Dhubri, Goalpara, Kokrajhar, Chirang, Bongaigaon, Barpata, Nalbari, Baksa, Kamrup rural and Metro has recorded highest percentage (47.49%) of area under potato in the state of Assam. Growth rate of area of potato crop was found positive and significant for Barpeta (1.43) and Kokrajhar district (1.42) of the zone during the period from 1985 to 2010. The co-efficient of lag area of potato crop was found to be positively significant in Barpeta, Goalpara, Dhubri and Nalbari districts of LBVZ of Assam. The co-efficient of previous year’s yield was observed to be positively significant for Goalpara district in linear model. On the other hand co-efficient of previous year’s yield was observed to be negatively significant for Dhubri district both in linear and log-linear model of analysis. But the impact of previous year’s yield had not influenced farmers to switch over for cultivation of other crops to derive more benefit, as the previous year’s production of potato was significantly positive in Dhubri district. The co-efficient of previous year’s production was observed to be positively significant for Dhubri district both in linear and log linear model of analysis. It was reflected from the study that with significant increase in potato production per unit area, the farmers had incorporated more area under the crop to derive more benefit. The co-efficient of Lag farm harvest price was not found to be significant for any of the districts as well as for the zone as a whole. The short run and long run price elasticities were found to be negative in four districts, viz., Barpeta, Kamrup, Nalbari and Kokrajhar district. While for Bongaigaon and Goalpara districts short run price elastic ties were found to be positive and long run price elasticises were found to be negative for both the districts.
