Nepal produces large quantity of mandarin (Citrus reticulata Blanco) annually but faces big losses due to improper postharvest treatments. The experiment was carried out during 2012-2013 with the objective of assessing the effect of different postharvest treatments on quality and shelf life of mandarin. The postharvest treatments were: wax emulsion at 10%, bavistin at 0.1%, wax at 10% with bavistin at 0.1%, calcium chloride at 1%, Jeevatu at 5% along with untreated fruits as a control. The experiment was conducted for four weeks of storage at ambient condition in Nepal Agricultural Research Council, Khumaltar, Kathmandu. Wax in combination with bavistin was found as the most effective in reducing the physiological loss in weight, whereas bavistin proved to reduce decay loss up to four weeks of storage. The fruits treated with wax alone and with combination of bavistin retained maximum firmness, juice percentage, vitamin C and palatability rating during the storage. The minimum total soluble solid and maximum titrable acidity were recorded in the fruits treated with wax plus bavistin. The present findings indicate that mandarin can be stored up to four weeks when treated with wax as well as wax with bavistin in the condition with 14˚C-18˚C temperature and 45%-73% relative humidity.
Mandarin (Citrus reticulata Blanco) is a promising fruit crop gaining popularity for its human nutrition and economic importance in Nepal. The qualitative losses during pre-harvest stage hinder the productivity and subsequently shorten the on-tree storability. An experiment was conducted to assess the effect of gibberellic acid on quality and shelf life of the mandarin fruit. GA3 at 10, 20, and 30 ppm as against of control were evaluated. Observations on fruit weight (g), fruit firmness (kg/cm 2 ), rind colour (1 -5 index), juice recovery (%), TSS/acid ratio, PLW (%), decay loss (%), and ascorbic acid (mg/100 ml) were recorded at three harvesting dates i.e. 20 Nov, 5 Dec, and 20 Dec and storage condition. It has been revealed that the fruits treated with GA3 at 20 ppm retained higher fruit weight (128.6 g), more firmness (3.54 kg/cm 2 ), better juice recovery (57.75%), and greater TSS/acid ratio (21.24) at the end of study (20 December). The PLW was found less with GA3 at 30 ppm in both ambient (5.17%) and cellar (6.69%) condition as against untreated fruits (9.52% and 11.76%). Similarly, the decay loss was minimum in the fruits treated with GA3 at 30 ppm both with ambient (1.02%) and cellar condition (8.21%) as against control with ambient (5.54%) and cellar (21.58%).
2016) Effect of Altitude and Maturity Stages on Quality Attributes of Mandarin (Citrus reticulata Blanco). American Journal of Plant Sciences, 7, 958-966. http://dx. AbstractMandarin (Citrus reticulata Blanco) is a premier fruit crop which ranks in first position of the total fruit industry in Nepal. Studies were conducted to assess the maturity indices and quality parameters of mandarin at three altitudes i.e. 1300 m·asl, 1000 m·asl, and 700 m·asl with six maturity stages i.e. 11 Oct, 21 Oct, 31 Oct, 10 Nov, 20 Nov, and 30 Nov. The most important and reliable judging criteria of fruit maturity in mandarin i.e. fruit weight, external fruit colour, firmness, TSS, acidity, and TSS/Acid ratio, and vitamin C were experimented. The experiment results revealed that 1000 m·asl location was showed the highest fruit weight (104.9 g) and juice percentage (55.23) followed by 1300 m·asl altitude (99.5 g and 53.75% respectively) at 20 th of November. The maturity advanced at lower altitude with 50 percent yellow orange rind colour, 10.98 TSS/acid ratio and 4 kg/cm 2 firmness from 10
The objective of this study was to assess the production and economics of potato in Achham district, Nepal. Sampling was conducted among the total of 90 registered farmers by simple random sampling method. The respondents were categorized into small and large scale farm holders based on the mean of the land holding under potato cultivation. The data were analyzed using SPSS, Stata and Microsoft excel. Cobb Douglas production function was used to find out the technological relationship between inputs used and output produced and to estimate and analyze the return to scale. The result of sociodemographic characters showed that the average household size, dependency ratio and area under potato cultivation was 7.53, 1.05 and 0.081 ha respectively. About 58% of respondents were growing potato in summer season. Human labor was the major input followed by seed, manure and bullock labor in both large and small farms. The production per household (kg), productivity (mt/ha) and price of yield (NRs. /kg) were 937.17, 12.287 and 30.33 respectively and there was significant difference in production (kg) per household between small scale farms (408.70) and large scale farms (1729.86). The total average cost, gross revenue and gross margin per hectare were estimated as NRs. 256,285.293, NRs. 373384.449 and NRs. 117099.156 respectively. The findings showed significant difference of variable cost between small and large scale farm which was due to the significant difference in use of inputs i.e. human and bullock labor mainly. Despite of adoption of improved potato production practices in most farms the average benefit cost ratio was 1.47. From the analysis of Cobb Douglas production function the inputs; human labor, seed and manure had positive relationship with income while bullock labor use had negative relation with the total income. The return to scale value was computed to be 1.033 indicating increasing return to scale in potato production in Achham district. Therefore, the findings suggest that, the production and income can be maximized if existing problems of irrigation, insect-pests, storage and marketing are solved and the inputs are made available in time and used properly. Keywords: Potato, Production, Cost, Economics, Production function
Mandarin (Citrus reticulata Blanco) is a premier fruit crop expanding rapidly in the hilly areas of Nepal. Most of the mandarin growers in Nepal are using conventional harvesting method which is responsible for deteriorating the fruit quality and shortening the postharvest shelf life. Thus, this experiment was conducted to evaluate the effect of different harvesting methods on quality and shelf-life of mandarin during storage under the Cellar condition (11±2°C and 85-90% RH). For this, mandarin fruits harvested by different methods i.e. hitting by sticks, direct pulling, twisting and pulling, and clipping were stored for 90 days and fortnight interval reading of different quality parameters were carried out. The experimental results revealed that fruits harvested by clipper with small pedicel intact recorded the minimum PLW (3.15%), decay loss (8.33%), and TSS (10.57° Brix) and retained the higher fruit firmness (3.30 kg/cm 2 ), maximum juice recovery percentage (49.69), TA (0.85%) and vitamin C (25.50 mg/100 ml) during the storage under Cellar condition. The study concluded that fruits harvesting with clipper can be stored safely up to three months under the Cellar condition.
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