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Full Text: 1 Introduction Wheat is the second most important winter cereal in India after rice contributing substantially to the national food security by providing more than 50% of the calories to the people who mainly depend on it. In historical perspective India had made spectacular advancement in productivity and sustainability of wheat and wheat based cropping system. The scenario of the past ten years has clearly indicated that the wheat production in the country has soared ahead despite area remaining the same. According to Joshi et al. (2014) this is mainly because of poor technological intervention in north eastern plain zone (NEPZ). Recently due to change in food habit particularly in West Bengal and Southern State of India, this crop becomes favorite to the growers. North Eastern Plain Zone is not a traditional wheat growing area in India, however different state under this zone become prime focus for another green revolution (Mukherjee, 2016).  Exploiting this area for wheat production has become a challenging task especially for West Bengal.  In spite of a wide range of adoptability, little attention has been paid towards wheat production and maximization of yield potential of this crop  mainly in few states (West Bengal, Bihar, Jharkhand etc.), and its share to national production is less than 1%  (Anonymous, 2016). Productivity of these states  confined to 2.8 t ha-1, and is far below the national average of 3.14 t ha-1 (Mukherjee, 2017). Amongst the various productions technology of wheat, suitable genotype and good agronomic practices plays a significant role for optimum output in term of yield. Usually farmers were unaware about the suitable cultivar due to poor extension support system (Sharma & Choudhary, 2014). Front Line Demonstration is one of the most powerful tools for transfer of technology, and this may be very helpful for new alluvial zone farmers. The main objective of front line demonstrations is to demonstrate newly released crop production and protection technologies and its management practices in the farmers’ field. The scientist are required to study  the  factors  contributing  higher  crop  production , field  constraints  of  production  and thereby  generate production  data and  feedback  information. Keeping in view of an effective extension approach of FLDs for dissemination of wheat technology, it was thought that impact of FLDs conducting by our unit was to be assessed.  Various observation during our study programme revealed that, most of the wheat growers stick to the age old traditional variety, which gave very poor return to the farmers. Hence, an effort made by scientist of AICPR on Wheat and Barley improvement, BCKV, Kalyani by introducing new wheat cultivar with improved technologies for enhancing wheat production through frontline demonstration. 2 Materials and Methods Present work was conducted during rabi season of 2016-17 in two different district of Nadia and Murshidabad of West Bengal, as mandatory programme of  All India Coordinated Research Programme on Wheat and Barley Improvement, under the aegis of  Bidhan Chandra KrishiViswavidayalaya, Kalyani, West Bengal, India. Under this programme, extensive training and field day was conducted to excel wheat grower’s better know how and skill about the recent technology of cultivation. All the demonstration work was conducted under strict supervision of scientist and technical staff of the AICRP unit. Sixteen number of demonstration was conducted (eight in each district) with the objective to enhance wheat grower income and change in cropping pattern from rice –rice to rice –wheat system. Under demonstration plot, improved cultivars with need based agronomic management were adopted. Trial mainly comprised of newly introduced high yield variety i.e. HD 2967. Farmer’s practice mainly includes UP 262 and Sonalika wheat cultivar (Table 1). Sowing time of crop was same in demonstration plot and famer field. All other steps like site choice, farmer’s selection, design of demonstration, farmers involvement etc. were charted as suggested by Choudhary (1999).  For clarification of outcome, 8× 8m2 plot harvested in three different locations in each demonstration and farmer’s practice plot. Grain weight measured in term of quintal per hectare (q/ha).  To know the economics cost of cultivation, net returns and benefit cost ratio (B:C ratio) were calculated by using prevalent prices of inputs and outputs. 3 Result and discussion Present FLD programme was conducted in ten hectare area and farmers who generally use the old varieties and don’t follow proper irrigation schedule and don’t apply the recommended dose of fertilizers were selected. Split application of recommended dose of nitrogen i.e. 75 kg per hectare (half of the recommended dose) in the form of urea, full dose of phosphate (60 kg / ha) and potash (40 kg/ha) in the form of SSP and MOP, respectively were applied uniformly as basal dose. Remaining part of nitrogen i.e. 75 kg / ha (half dose) in the form of urea was top-dressed at first irrigation i.e. 21 days after sowing. The crop was irrigated four times  ( first one at CRI stage, second one at jointing, third at flowering and fourth at soft dough stage of the crop) based on soil moister content. The farmers usually adopt broadcasting of seed, however in present study, an attempt  to convince them about line sowing was carried out, but studied respondents denied to follow the given suggestion due to labour problem (Meena et al., 2016).Usual farmer exercise vary from demonstrated plot in term of date of sowing, fertilizer application and number of irrigation and few other agronomic practices i.e. weed control etc. (Table 1). Enhanced skill involvement with suitable variety, revealed that economic (grain) yield of  HD 2967 (39.75 q/ha) was quit good enough compared to traditional variety of UP 262  and Sonalika (25.33 q/ha). Use of good cultivar resulted 56.91 % grain yield which is significantly superior to the grain yield of UP 262 and Sonalika (Table 2). Stover yield was quite prominent in case of HD 2967 (57.79 q/ha) and showed better performance over the farmer cultivars (39.98 q/ha) (Table 2). Further, improved variety registered 30.81 % more straw yield over the traditional variety of farmers. Benefit: cost ratio exposed that farmer outflow towards the husbandry of wheat was Rs. 35,100 /ha compared to new variety in demonstration plot of Rs. 45,600/ha. This high cost was chiefly due to better variety, cost of inputs, irrigation and other post-harvest management (Table 3).  Higher B : C ratio observed with FLD plot  (1.80) and was very much acceptable by the local growers. Similar kind of observation reported by Meena et al (2016).With the above outcome, FLD were carried out in proper and scientific manner on farmer’s field to show the value of a new change, and convincing agricultural community about potentialities of better invention technologies of wheat for further adoption (Joshi et al.,2014 ). Response receives from different farmer’s revealed that farmer were very much benefitted with the FLD and their response were quite good and positive. This corroborate with the earlier work of Mishra et al. (2009). The farmers became familiar with novel cultivars of wheat and came to recognize more about improved wheat production through these programmes. Farmers from FLDs field trials, were happy because better varieties did better yield  and  fetch more economic  returns than the check cultivar. Agro-ecological restraints exposed that few of stern disease and weeds were observed. Adjacent farmers’ reaction was positive about the demonstrated FLD. With the above study, we came to conclusion that, wheat FLDs were perceived by the farmers as effective method of transfer of technology from field to knowledge level of farmer’s.  No serious diseases, neither in demonstration plot nor in check plot except few cases in Jalangi, Murshidabad district were reported during FLD programme. Few notable, observation on termite infestation were reported in few pockets. Further findings of present study revealed that, usually famer lack the knowledge of suitable dose and technique of herbicide use. Aggravated problem of Cyprus rotundus,Chenopodium album, wild rice and Rumexdentatus observed (Table 4).  Under abiotic stress, water shortage and high temperature at maturity was also become severe restraints. With discussion to the farming community, it came to know that lack of information among farmers about recent knowledge and poor contribution of farmer in exposure visits was most restraining factor for enhancing wheat production. Day to day observation of present study revealed that, poor land holding and lack of suitable mechanized technology was one of the most important constraints.   Table 4 Agro - economical, technical constraints /problems limiting wheat yields in the area
S. No. Constraint/Problem MS S NS S.No. Constraint/Problem MS S NS I.  Diseases       V.  Socio-economic       i. Yellow Rust     Ö i Non availability of labour Ö     ii Loose smut     Ö ii Non availability of crop loan Ö     iii Powdery Mildew     Ö iii Higher custom hiring rate of land leveling, field preparation, sowing & harvesting   Ö   iv Karnal Bunt     Ö iv Small land holdings Ö     II.  Insects-Pests       VI.  Inputs       i Aphid       i High cost of inputs   Ö   ii Termite   Ö   ii Poor quality seeds Ö     iii Stem borer   Ö   iii Non-availability of  seed of newly released variety Ö     iv Leaf folder       iv Poor soil fertility (NPK)     Ö III.  Weed Infestation       v Non-availability of Nitrogen/ Phosphorus fertilizer at desired time     Ö i Resistance against herbicide       vi Poor quality herbicides/pesticides  
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