This study was carried out to identify the most efficient and suitable marketing channels of mango in some selected areas of Bangladesh by using primary data collected randomly from 90 farmers and 55 traders. Out of 55 traders, 15 were Bairals, 15 were Beparis. 9 Aratdar (local), 6 Aratdar (urban), 10 Retailers (both local and urban). According to the volume of mango handled and longevity or participation of the intermediaries in the channel, five major channels were identified as dominant in the study areas. The channel Farmer Bairal-BepariAratdar (Dhaka)-Retailer (Dhaka)-Consumer ranked first. The results showed that channel V, Farmer-Retailer Consumer, possesses the highest marketing efficiency followed by channel IV, III, and II. The performance indicators revealed that the channel I and channel II were not relatively efficient in the mango producing regions. Unstable price of mango was the first rank problem in the study area. Establishment of mango processing plant in the intensive growing areas may be the remedy of the problem, which will ensure fair prices for the farmer.
The aphid incidence and its correlation with environmental factors were studied. Mustard variety "Sampad" was used as test crop. Aphid incidence varied significantly at various parts of mustard plant and time of the day. The highest number of aphid was observed in the vegetative parts of the mustard plant in the morning. High cloudiness, relative humidity and dew point favoured the aphid population and slight rain fall quickly declined the aphid population. Among the different environmental factors maximum temperature, dew point and sun shine hours were positively correlated with aphid population and minimum temperature, relative humidity and wind speed were negatively correlated with aphid population.
The present study has been conducted to examine the differences in input use, costs and returns of the borrower and non-borrower rice farmers. One hundred samples from four villages under Tiishal Upazila of Mymensingh district were selected for the study. The study reveals that borrower farmers used more inputs and attained more returns through higher yield than their counterparts. The yields of rice per hectare were 5260.80 kg and 4177.34 kg for the borrower and non-borrower farmers, respectively. The gross returns and net returns were Tk. 41699.03 and Tk. 4475.64, respectively, for the non-borrower farmers and Tk. 51589.53. and Tk. 8821.68, respectively, for borrower farmers. The undiscounted BCRs were 1.73 and 1.12 in case of non-borrower farmers and 1.74 and 1.21 for the borrower ones. The study further reveals that credit could be judged as a vital player to increase higher yield through utilization of necessary production inputs.
Study has been conducted to establish a suitable culture technique for Tubificid worm, Tubifex tubifex using different culture media. Cowdung, Rawfish and vegetables were evaluated as culture medium. Each medium was supplied as supplementary food at the rate of 250 mg/cm2 per week for 145 days. Water temperature, pH and ammonia of the rearing media ranged from 27.1-31.670C, 5.76-7.35 and 0.5 - <2.5 mg/l respectively. Among the three media, the worms grew well in size in the cowdung medium whereas rawfish showed a moderate growth of worms with remarkable number of new generation of worms. There was no significant growth of worms in the vegetables. The collection of Tubifex was quite difficult but highest amount was in cow dung (8.192 mg/g), moderate in rawfish medium (4.14 mg/g) and lowest in the vegetables (2.43 mg/g). Cowdung medium showed the maximum growth in this study period which is more viable, easy and economical.Bangladesh J. Zool. 42(1): 117-122, 2014
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