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The present study was conducted by Krishi Vigyan Kendra, Chatra for two years i.e. 2018-19& 2019-20 to find out the effectiveness of the different combinations of teaching tools on knowledge gain by vegetable growers farmers of the district. Farmers trained through a combination of teaching method i.e. group meeting + lecture + exposure visit (TO3) gained higher level of knowledge score (70%) followed by a medium level of knowledge score (30%).Positive and significant relationship had been observed between the knowledge gain and annual income of the respondent's group who received training through group meeting + lecture + exposure visit.Respondent education and gain in knowledge by lecture method, lecture + exposure visit, and group meeting + lecture + exposure visit had positive and significant association.

An On-Farm Trial (OFT) was conducted in the year 2016-17 and 2017-18 to assess the resistance level of different okra varieties against yellow vein mosaic virus in Kharif season of Chatra district of Jharkhand. The experiment was conducted in vegetable growing village Gidhour in Gidhour block of Chatra district in Jharkhand. The trial was designed in randomized block design consisting of 20 replications with three technological option i.e. TO-I Arka Abhay (N100P60K50), TO-II Arka Anamika (N100P60K50) and-III Pusa Makhmali (N100P60K50). For assessment related to yellow vein mosaic, percentage infestation in 5sqm and yield q/ha and economic was considered. The lowest infestation of yellow vein mosaic virus was observed in Pusa Makhmali variety i.e. (3.8%) with yield of 132.5 q/ha. It was also found superior in terms of Gross Income, Net Income and Benefit: Cost Ratio followed by Arka Anamika and Arka Abhay, respectively. Farmers’ response was also positive in all respects except the availability of varieties in local market.

The study was conducted on purposively selected Mardanpur village of Chatra block in Chatra district where Sri. Danbhushan Lakra, Progressive farmer has developed a unique model of integrated farming system (IFS) in his 5 acres of the farm. He has designed the farm and segregated the land as per the crops and animal requirement. The IFS model comprised of field crops in 2 acres, vegetables in 1 acre, fruit plants in 0.5 acres, a pig farm in 0.25 acre, a dairy farm in 0.25 acre, Poultry in 0.25 acre, composite fish farming in 0.75 acres. Sri Danbhushan Lakra has adopted the best practices of farming under technological support of Krishi Vigyan Kendra, Chatra. The productivity and economic return of different enterprises and commodities were calculated and compared with previous productivity and economics. The result indicated that Sri. Danbhushan Lakra has got more than 80 per cent additional yield and profit on different enterprises, which are integrated into the farming system. He has reduced 60% external input like the feed of animal, chemical fertilizer requirement, overall he earns the annual net income Rs. 94430.75 that is 68.6% more as compared to his previous income. It happens due to the interrelation set of enterprises used so that the waste from one component became input for another part of the system, which reduced cost and increased productivity.

An On-farm trial (OFT) was conducted for evaluating the performance of different management practices for control of leaf curl disease of chilli in Kharif season in Chatra district of Jharkhand in two consecutive Kharif seasons of the year 2016-17 and 2017-18. The experiment was conducted in Amgawa village of Simariya block in Chatra district, where farmers generally grow Chili as a cash crop in medium land. Trial was designed in randomized block design consisting of 25 replication with three technological options i.e. TO-I: Soil application of carbofuran granule @2 gm/plant before transplanting, TO-II – TO-I: Soil application of carbofuradon granule @2 gm/plant before transplanting, + Spray of Spinosad 48 EC @ 2 ml/lit of water after disease incidence twice after 15 days interval and TO-III – TO-I: Soil application of carbofuradon granule @2 gm/plant before transplanting, +Spray of Acephate 75SP @ 2 ml/lit of water after disease incidence twice after 15 days interval besides farmers practices. For evaluation of the performance, percentage infestation of leaf curl disease on plant/5 sqm and yield q/ha was considered, as for economic analysis gross income, net income and B.C. ratio was calculated and compared with all treatments. The result indicated that the minimum thrips population was found in technological option TO-III (3.35) followed by TO-II (6.45) and TO-I (6.40) respectively with a higher yield (84.5q/ha). Gross income, Net income and BC ratio was also found more in technological option TO-III. So that technology option TO-III i.e. –soil application of carbofuradone granule @ 2gram/plant before transplanting spray of acephate 75SP @ 2ml/lit of water after disease incidence twice after 15 days interval recommended considering Bio-physical and socio-economic condition of Chatra district for control of leaf curl disease for resource-rich and resource-poor farmers. This recommendation was also given to ATMA and N.G.Os of the district for faster dissemination among the farming community.

The FLD experiment was conducted in 20 replication (Farmers field) in National Innovation on Climate Resilient Agriculture (NICRA) village Mardanpur in Arra Panchat of Chatra block in Chatra district of Jharkhand on three consecutive year 2014-15, 2015-16 and 2016-17. The FLD experiment was conducted in randomized block design with 2000 m2 plot size for each technological option. The two technology options are as follows TO-I: (Farmers Practice) Burning of plant leaf in forest area and use as cooking material and transplanting ginger in the month of May without mulching with N100P60K60. TO-II: Mulching of ginger field by plant leaf (5 q/ha) with N75P40K45. The rationale behind selection of technology option (TO-II) was disseminate scientific recommendations i.e. mulching of ginger field to demonstrated famers convincing the benefit of mulching in the place of burning leaf in forest area. The data on soil chemical analysis before and after mulching, yield and economic was recorded for better interpretation matrix ranking was done for each of intervened treatments on the basis of farmers criteria matrix ranking was accomplished through participatory rural appraisal. Farmer’s reaction was measure in five point rating scale. The overall score reflecting the degree of favorable, unfavorable and neutral to the related technology intervention (Negative = 2.5, Natural = 2.3 – 3.5 and positive above = 3.5). Result indicated that on an average ginger yield was 144.83 q/ha in farmers practice where as in technology option (TO-II), it was 187.7 q/ha respectively. Return per rupee spent was also found more in TO-II i.e. 4.99 as compare to farmer practice i.e. 3.88.

Front line demonstration was conducted during the years 2014-15, 2015-16, 2016-17 in NICRA adopted village Mardanpur in Arra Panchyat of Chatra Block in Chatra district of Jharkhand. The study was conducted to assess the effects of decomposition of paddy stable on productivity and profitability with soil health in local farming system as well as extra pollution of the technology to similar micro farming situation. The experiment consisting of two technology option TO-I: (Farmers Practice) Burning of paddy stable in field and collecting paddy stable for use as fuel of cooking and after onset of monsoon field prepare and transplant rice (Variety-Abhishek) with N80P60K30 TO-II: Decomposition of paddy stable 4.5q/ha after onset of monsoon in the month of June through rotovator and transplanted rice (Variety – Abhishek) with N60P45K23 in RBD design with 20 replication. The result showed that an average grain and straw yield of rice was 25q/ha and 74.80 q/ha in farmers practice in technology option TO-I where as technology option (TO-II) i.e. 28.33 q/ha and 98.84 q/ha respectively. Return for rupee spent was also higher i.e. 2.40 in TO-II as compared to farmers practice i.e. 1.85 (TO-I). It is due to (25%) reduction of chemical fertilizer in technology option (TO-II).

Road accidents are very common in India. World Health Organization (WHO) has revealed that India the worst road traffic accident rate worldwide. According to the report, poor driving pattern, drunk driving, badly maintained roads and vehicles are the main triggering factors to road casualties. Statistics shows that one serious road accident in the country occurs every minute. The national capital, Delhi is among the deadliest. To achieve aim of reducing road accidents, novel and robust prevention strategies for improved road severity have to be developed. In this work, we propose use of data mining frame work to analyze traffic on National Highways of India. Using real data set of National Highway of India, we will mine important patterns for accidental data on National Highways of India and, identify key causes to road casualties. The discovered knowledge can be used by Ministry of road transport & highways of India to take effective decisions to reduce road severity.