• Korean Journal of Organic Agriculture
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• v.23 no.4
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• pp.703-713
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• 2015

A Linear Approximated Inverse Almost Ideal Demand System, suggested by Eales and Unnevehr, is estimated with monthly data set of Korean fruits consumption. LA/IAIDS consists of 6 demand equations which correspond to domestically produced Hanrabong, overwintering mandarin, strawberry, melon and tomato with imported orange. The results indicate that price and scale flexibilities are negative, as expected. And the significance is that a 10% increase in imported orange quantity is associated with 5.5% declines in the price of Korean Hanrabong while the price of other fruits is minimally affected. In addition, the estimate of scale flexibility of Hanrabong (-2.96) is much smaller than any other fruit. Hanrabong farmer might be in the face of deficit operation as a consequence of the substitution effect if orange would be imported in accordance with the Korea-U.S. free trade agreement.

• Journal of Bio-Environment Control
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• v.7 no.3
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• pp.219-225
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• 1998

This study was carried out to determine the optimum nodes of pinching and fruit setting in muskmelon cultured by deep flow technique. A fruit was set either at 7~8th, 11~12th, or 15~16th nodes, and main shoot was pinched either at 22nd or 27th node. Distance between rows was set the same at 100cm, while the distance between plant in the row was set at 25, 35, 45, or 55cm. In treatments with the same node of fruit setting, fruit quality was enhanced and mean fruit weight increased on 22nd node compared to 27th node. terms of fruit quality as affected by node of fruit setting, larger fruits with lower soluble solid concentrations were produced as fruits were set at higher nodes. In terms of planting density, larger fruits with higher concentrations of soluble solid were produced in the 100cm$\times$45cm and 100cm$\times$55cm treatments compared to 100cm$\times$25cm or 100cm$\times$35cm treatment. Total fruit yields decreased as the planting density decreased. However, percent marketable fruits produced was the greatest in the 100cm$\times$45cm treatment, followed in descending order 100cm$\times$25cm, 100cm$\times$35cm, and 100cm$\times$55cm treatments.

• Journal of Sericultural and Entomological Science
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• v.40 no.1
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• pp.1-7
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• 1998

The morphological and chemical characteristics of leaves and fruits were observed in the three mulberry varieties, including Daeryugppong(Morus Lhou(Ser.) koidz), Kugsang 20(Morus Lhou(Ser.) koidz) and Cataneo(Morus alba L.). The leaf development in spring was earliest in Cataneo and latest in Kugsang. Content of total nitrogen and Mg in leaf was the highest in Cataneo while that of P2O5, K and Ca in Daeryukppong. Flowers started to bloom from May 8 and in full bloom around May 15. Mature fruits began to set from June 10 to 15 and lasted by July 10 in Cataneo. Average fruit weight was heaviest in Kugsang 20(3.52 g/fruit), while lowest in Daeryukppong(1.61 g/fruit). In fruits, glucose and fructose were the major sugars. Citric acid was the most abundant organic acid in three varieties with its average content from 0.8 to 0.14%. The major pigment in fruit was anthocyanin and its content varied among varieties. The stability of anthocyanin was evaluated under various pH, temperature, and sugar concentrations. Rutin was the major flavonol glycoside present in fruits and its content varied from 0.92 to 3.36 mg/gDW. Other flavonol glycosides such as isoquercitrin and quercitrin were also detected in fruit.

• Agribusiness and Information Management
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• v.6 no.1
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• pp.1-11
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• 2014

The purpose of this study is to develop the growth prediction model that can predict growth and development information influencing on the production of citrus fruits. The growth model was developed to predict the floral leaf ratio, number of fruit sets, fruit width, and overweight fruits depending on the main period of growth and development by considering the weather factors because the fruit production is influenced by weather depending on the growth and development period. To predict the outdoor-grown citrus fruit production, the investigation result for the standard farms is used as the basic data; in this study, we also understood that the influence of weather factors on the citrus fruit production based on the data from 2004 to 2013 of the outdoor-grown citrus fruit observation report in which the standard farms were targeted by the Agricultural Research Service and suggested the growth and development information prediction model with the weather information as an independent variable to build the observation model. The growth and development model for outdoor-grown citrus fruits was assumed by using the Ordinary Least Square method (OLS), and the developed growth prediction model can make a prediction in advance with the weather factors prior to the observation investigation for the citrus fruit production. To predict the growth and development information of the production of citrus fruits having a great ripple effect as a representative crop in Jeju agriculture, the prediction result regarding the production applying the weather factors depending on growth and development period could be applied usefully.

• Food Science and Preservation
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• v.15 no.4
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• pp.593-597
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• 2008

This study was performed for obtaining optimal extraction conditions to produce peach liqueur containing chitosan. Alcohol content of unsliced fruits was the largest recording 30% after extracting for 8 weeks and those of fruits sliced into four pieces were high recording around 28% after extracting for $6{\sim}8$ weeks. Sugar content was $11{\sim}13^{\circ}Brix$, total acidity was around 0.2% and pH was about 4.8. While soluble solids content was around 2.8% in unsliced fruits with a little change of the content, those of fruits sliced into four pieces were ranged from 2.8% to 3.1% and showing a tendency that longer extraction time increased the content. Brownness of unsliced fruits and fruits sliced into four pieces were $0.33{\sim}0.54$ and $0.56{\sim}0.73$ respectively. Total phenol content showed a similar tendency with brownness and the total phenol content of sliced fruits was higher than that of unsliced fruits by only around 0.2 mg%. When peach liqueur was made by extracting unsliced fruits massively by following conditions set above, methanol content grew with longer extraction time but the difference was not significant and the content was detected to be extremely small recording about 50 ppb. Among organic acids, oxalic, malic and citric acids were found, and fructose, glucose, sucrose and maltose were detected as free sugars. In conclusion, extracting unsliced fruits for 8 weeks as extraction conditions showed an excellent quality in overall for peach liqueur containing chitosan.

• Journal of Bio-Environment Control
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• v.21 no.4
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• pp.379-384
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• 2012

Bitter gourd (Momordica charantia L.) has long been used for food and medicinal plant in Korea, China and Japan. This study aimed at evaluating productivity, and vitamin-C and charantin contents in bitter gourd (Momordica charantia L.) accessions. The contents of charantin of these two accessions were analyzed using HPLC with the UV-diode array detection. The highest fruit yield was observed in accessions, 'BG1' and 'BG7.' The vitamin-C contents of fruits in these two high-yield bitter gourd accessions, 'BG1' and 'BG7,' depended on days after fruit set and were highest in 24 days and 17 days after fruit set, respectively. The charantin contents of the two accessions were different according to the number of days after fruit set. The charantin content of 'BG1' was highest in fruits harvested at 24 days and followed by 15 days after fruit set. The charantin content of 'BG7' was highest in fruits harvested at 13 days and followed by 16 and 19 days after fruit set. The charantin contents of 13 M. charantia accessions with relatively high yield potential were analyzed and three accessions, 104615, K169995 and NS454, were selected based on their relatively high yield and charantin content. These accessions will be used for breeding program and processed foods.

• Journal of Bio-Environment Control
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• v.20 no.2
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• pp.156-161
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• 2011

This experiment was performed in order to define the characteristic and quality of the fruits set on primary and secondary shoots in 'Heukgoosul' grape. The numbers of flower clusters per shoot were 1.1 and 0.6 in primary shoots and secondary shoots, respectively. The fruits of primary shoot showed 12.1 g of higher berry weight than 8.9 g of the fruits set on secondary shoots. Fructose and glucose contents were significantly higher in the fruits of secondary shoots during veraison, but the levels gradually decreased, reaching a similar level with those of primary shoot at the harvest stage. The acid content decreased rapidly from day 50 after full bloom in both primary and secondary shoots, but the rate of decrease slowed down from day 70 after full bloom in secondary shoots. Berries of secondary shoots showed rapid increase of skin coloration during veraison and reached a high degree of coloration within a short period when compared with those of primary shoots.

• The Journal of the Convergence on Culture Technology
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• v.10 no.6
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• pp.849-853
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• 2024

This study was conducted from May 11 to June 20, 2024 to compare the growth of dwarf tomato according to light sources (White LED, Red + Blue LED) to select a light source suitable for urban agriculture. White LED (WH) and Red + Blue LED (RB) have differences in wavelength and total light intensity. Not only growth factors but also the number of fruits set and sugar content were significantly higher in WH than in RB. These results are thought to have been affected by the intensities of blue and red wavelengths, but they were determined to be influenced by the sum of all wavelength intensities (= total light intensity). Therefore, it is thought to be better to use WH with various wavelengths and high total light intensity for cultivation of tomato at home.

• Journal of Plant Biotechnology
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• v.30 no.4
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• pp.347-352
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• 2003

This work was undertaken to study the effect of stigmatic and cut-style pollination on self seed set in Lilium longiflorum and L. ${\times}$ formolongi, and their crosses as the female parent with other cultivars/genotypes. Stigmatic pollination of L. longiflorum cv. Gelria and Lorina resulted in cent per cent fruit set with mean number of seeds/fruit of 189 and 70, respectively. However, cut-style pollination resulted in 87％ and 40％ fruit set in Gelria and Lorina, respectively. The corresponding mean number of seeds/fruit was 53 and 20. In L. ${\times}$ formolongi, stigmatic pollination set 80％ fruits with 736 seeds/fruit. On the other hand, cut-style pollination resulted in 47％ fruit set with 81 seeds/fruit. The intraspecific stigmatic pollination of L. longiflorum cv. Gelria and Lorina with other cultivars formed 60％ fruits with a mean number of 18 seeds/fruit. However, only 20％ fruit set with mean number of seeds/fruit of 7 was recorded when cut-style pollination of L. longiflorum cultivar were pollinated with other cultivars/genotypes. In the intraspecific pollination of L. ${\times}$ formolongi cv. Raizan with Novia, fruit set resulting from stigmatic and cut-style pollination was 75％ and 50％, respectively with the corresponding mean number of seeds/fruit of 579 and 98. It was concluded that self as well as intraspecific seed set in the two species of Lilium gets considerably reduced as a result of cut-style pollination.

• Korean Journal of Plant Taxonomy
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• v.45 no.4
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• pp.353-361
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• 2015

Spatio-temporal variation in fruit set in orchids would affect long-term population viability and will influence genetic diversity over many generations. The aim of this study was to examine the breeding system of the nectariferous terrestrial orchid Epipactis thunbergii, to specifically determine levels of fruit set in terms of time and space under natural conditions. We examined pollination under natural conditions and conducted hand pollination experiments during a 2-year survey in four populations located along 1.5 km of coastal line in Jinguiri (rual village) [Jeollanam-do (province), southern Korea]. We found that, over a 2-year period, levels of percentage of fruit set were similar within patches of the four populations. By contrast, we detected significant differences in the percentage of fruit set among patches. We also found that plants with larger inflorescence size produced significantly more fruits than plants with fewer flowers. Over a 2-year period, the percentage of fruit set for E. thunbergii was similar but low (14.1%) compared to that averaged for eighty-four rewarding species (37.1%). However, an increase in fruit set was achieved by hand-pollinations: artificial self-pollination (90.5-95.2%), artificial geitonogamy (94.7-95.0%), and cross-pollination (artificial xenogamy, 91.3-91.4%). No emasculated flowers produced fruits and no automatic pollination was found in E. thunbergii. Our findings suggest that E. thunbergii is a self-compatible terrestrial orchid that depends on pollinators (insects) to achieve fruit set in natural habitats, and that local environmental conditions were similar over a period of 2 years in the study area. Our results also highlight the cryptic variation of fruit production in time, but more pronounced variability in space.