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Rough lemon (C. jambhiri Lush.) is a valuable citrus species of North-Eastern India. This fruit stands third in position among the citrus fruits in this region. Although used as a rootstock all over the world, this species are more popular and demanded for its nutritious fruits here. There is a tremendous variation in various types of rough lemon available in the region. Moreover, many people confuse it with other citrus species during its juvenile period. Hence, this article might be helpful in identification of jambhiri with the description of its leaf morphological characters.

The Cluster Frontline Demonstration (CFLD) on lentil var.WBL-77 was conducted by Krishi Vigyan Kendra (KVK), Kokrajhar to find out the grain yield, technological gap, extension gap, and economics during 2020-21 and 2021-22. In both year, lentil variety WBL-77 was used in the demonstration plot and considering local variety as check in the farmer's plot. The result of the study revealed that the yield of lentil was found to be 10.0 q/ha and 9.50 q/ha, respectively under the demonstration plot as compared to 7.0 q/ha and 6.50 q/ha, respectively under the farmer's plot and the yield increased by 42.85 and 46.15 percent, respectively during the year, 2020-21 & 2021-22. The technology gap, extension gap and technology index were found to be 2.0 q/ha & 2.5 q/ha, 3.0 q/ha & 3.0 q/ha, 16.6 % & 20.83%, respectively during 2020-21 & 2021-22. The net return (Rs. 31314.00 /ha & Rs.34074.00 /ha, respectively during 2020-21 & 2021-22) and Benefit Cost ratio (2.59 & 2.87, respectively during 2020-21 & 2021-22) were found to be highest under demonstration plot in both the years. The results depict that the seed yield of lentil in the Kokrajhar district could be enhanced by using lentil var. WBL-77 over local variety and CFLD could be an effective tool to minimize yield gaps.

The present study was carried out at five different villages of Kokrajhar district of Assam where cluster front line demonstration (CFLD) of High Yielding Variety (HYV) of rape seed (TS 46) was conducted by Krishi Vigyan Kendra, Kokrajhar.  A total of 652 nos. of front line demonstration (FLD)s were evaluated to find out the yield gaps between HYV toria variety TS 46 and variety grown by farmers. Yield data of both demonstration and farmers practice were recorded and their yield gap, technology gap, extension gap and technology index were analyzed. The yield of rape seed variety TS 46 was registered 22.38 to 50.00 per cent higher over farmer’s variety. On an average technology gap, extension gap and technology index were recorded as 2.28qha-1, 2.08 qha-1 and 20.73 per cent respectively.