• KOREAN JOURNAL OF CROP SCIENCE
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• v.39 no.5
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• pp.420-425
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• 1994

Soybean seeds deteriorate even before harvest, especially under high temperature and high relative humidity conditions. This study was conducted to determine the effect of harvest date on seed quality in early maturing soybean cultivars. Soybean cultivars used in the experiment were Damyang-native, having small seed with yellow color, and Yuhsuzumi, having large seed with green color. The length of physiological maturity to grain harvest was 24 days in Yuhsuzumi and 8 days in Damyang-native. The moisture contents of seed were 25.3 % in Yuhsuzumi and 14.5 % in Damyang-native cultivar when pod reached its mature pod color. The seed color of Yuhsuzumi started to turn yellow, and its germination rate was greatly decreased when harvest was delayed after maturity, However, Damyang-native cultivars produced seed of high quality regardless of delayed harvest.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.41 no.3
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• pp.257-265
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• 1996

To obtain the basic informations necessary to develop the production technology of vegetable soybean seeds, this study was conducted at the National Crop Experiment Station, RDA, Suwon, Korea in 1993. Seeds of three vegetable soybean varieties, 'Mikawashima', 'Hwaeomputkong', and 'Seokryangputkong' produced at Pyeongchang, a highland in Korea and introduced from Japan were planted on April 20 in the field. The emergence rate among varieties was significanlty different. Emergence rate of seeds produced at Pyeongchang was higher by 7% than that of the seeds from Japan. Rate of pod infection by Phamapsis spp., brown spot by Septaria glycines, soybean mosaic virus(SMV), and downy mildew by Peronospora manshurica in the field was not different between locations. The growth characteristics, yield components, and green pod and grain yields were not different between locations. Therefore, it was proved that the production of vegetable soybean seeds with the better quality and higher emergence is possible in highland, Korea. possible in highland, Korea.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.12
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• pp.31-36
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• 1972

These studies were carried out to find out the proper plant spacing and the optimum amount of nitrogen for maximum yield, on the occasion of early planting with creen vegetable (soybean for cook with rice) at the low temperature in early spring. The plant spacing were applied in 5 levels (50cm$\times$5cm, 50cm$\times$10cm, 40cm$\times$10cm, 30cm$\times$10cm and 30cm$\times$20cm) and the amount of nitrogen were applied in 4 levels (non, standard, twice and triple-amount), The triple super phosphate and potassium chloride were applied only in standard amount. The promotion of flowering was practised by the short-day treatment for 10 days (11 hr. a day). The variety examined was the early maturing one, HOKKAI # 1. and the results are as follow. 1. The plant spacing for maximum yield by the promotion of branch, pod and garin per a plant recognized the fact that there were 2 levels (50cm$\times$10cm and 30cm$\times$20cm planting method) and the maximum yield by the promotion of pod and grain per area showed the fact that there were 2 levels (50cm$\times$5cm and 30cm$\times$10cm planting method) in narrow planting method. 2. The optimum amount of nitrogen applied for maximum yield of pod and grain per area recognized w hat was sufficient as standard amount.

• Journal of Bio-Environment Control
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• v.16 no.3
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• pp.186-193
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• 2007

Effects of deficit irrigation by different soil moisture-based water potential on the reduction of green shoulder fruits in fresh tomato were investigated. Deficit irrigation with -30 kPa treatment significantly reduced green shoulder fruit by 53.7% compared to the -15 kPa treatment. The total concentrations of potassium in levels of whole fruit was not different between normal red fruit (NRF) and green shoulder fruit (GSF). However, the concentrations of potassium in distal part of GSF lower than that of a basal part of GSF Total soluble sugar contents in NRF and GSF were increased during the maturation periods. Contents of starch in NRF and distal part of GSF were decreased during the maturation periods. However, contents of starch in basal part of GSF was not change during the maturation periods. Activity of sucrose phosphate synthase was higher in NRF than that of GSF. Activity of acid invertase in NRF and GSF decreased rapidly during the maturation periods. Activity of acid invertase was significantly different in distal and basal part of GSF. Total activities of peroxidase and alcohol dehydrogenase in NRF were higher than that of GSF.

• Korean Journal of Plant Resources
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• v.18 no.3
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• pp.424-432
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• 2005

Newly introduced two lines of apios (Apios americana Medikus, red-vine and green-vine) were grown in Jeju island, to clarify their growth and production characteristics as well as to develope as a new edible crops in Korea. Both lines bloomed but did not develop to pod and seed. The red-viny line showed the habit of more early growth and maturity compared with green-viny line. Fresh tuber yields per 10a harvested in late November ranged from about 500kg to 800kg as according to the lines and cultural condition. Fresh tuber yield of red-viny line was relatively greater than that of green-viny line, mainly due to their higher tuber number per plant. Among the planting dates(April 1, April 16 and May 1) of seed tubes, highest tuber yield was obtained on May 16 planting. And the stacking cultivation culture was better than non-stacking cultivation in respect of tuber yield and disease avoidance. These results indicate that apios can produce in Jeju island, and in order to extend its cultivation to farmers it will be needed to develope some cultivars with high yields as well as labor-saving cultivation methods.

• Korean Journal of Breeding Science
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• v.40 no.4
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• pp.507-511
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• 2008

A new mungbean cultivar "Sohyeon" (Vigna radiata (L.) Wilczek) was bred from the cross between "Suwon28" and "KM94004" at the Jeollanamdo Agricultural Research & Extension Services (JARES) in 2006. "Sohyeon" has erect type, heart shape leaflet, green hypocotyl, black and straight pod when matured, and dull green seed surface. This new cultivar shows 42 g per a thousand seed weight. And sprout yield was up to 9% more than that of comparison cultivar "Owool". It contains 12.0, 12.4 mg/g of vitexin and isovitexin, respectively, which was shown about 38, 31% more than comparison cultivar. It shows resistance to mungbean mottle virus, cercospora leaf spot, and powdery mildew in the normal cultivate condition. The average yield of this cultivar shows 1.62 ton/ha, which was 7% more than comparison cultivar.

• Korean Journal of Breeding Science
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• v.49 no.3
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• pp.230-234
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• 2017

A mungbean variety 'Suhyeon' (Vigna radiata (L.) Wilczek) was derived from the cross between 'Jeonnam14' and 'IT208777' at the Jeollanamdo Agricultural Research and Extension Services (JARES) in 2010. 'Suhyeon' has erect growth habit, heart leaflet, green hypocotyl, black and straight pod when matured, and dull green seed surface. The stem length of 'Suhyeon' was 66 cm, which was 5 cm less than check variety 'Owool'. The pods number per plant of 'Suhyeon' was 24, which was 5 more than check variety. The sprout yield ratio of 'Suhyeon' was 8.67 times, which was 16% more than check variety. The contents of starch, protein and fatty acid of seed were 62.7, 27.3, 1.89%, respectively. The average yield of 'Suhyeon' was 1.74 ton/㏊, which increased 8% more than that of check variety. (Variety registration number: 5107)

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.18 no.12
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• pp.104-110
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• 2019

A nanosatellite designed by the Korea Microgravity Science Laboratory (KMSL) is currently under development. The KMSL nanosatellite is designed to perform two different scientific missions in space. To successfully complete missions, a variety of tests must be conducted to verify the performance of the designed satellite before launch. As part of the qualification test campaign, the KMSL nanosatellite underwent high level vibrational tests (to comply with Falcon 9 qualification level) to demonstrate the integrity of the system. The purpose of this study is to demonstrate that the primary structure and all electronic and mechanical components can withstand the vibrations and the loads experienced during the launch period. To this end, the KMSL nanosatellite was exposed to static and dynamic loads and various types of vibrations that are inevitably produced during the space vehicle launch period. The vibration test results clearly demonstrated that all avionics and mechanical components can withstand the vibrations and the loads applied to the KMSL nanosatellite's body through a Pico-satellite Orbital Deployer (POD).

• KSBB Journal
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• v.5 no.1
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• pp.43-47
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• 1990

It was determined optimal Culture conditions and suitable growth regulators for seed germination, growth of callus, and protoplasts derived from cultured and mesophyll cells in Gremastra appendiculata. Induction of fusion between protoplasts of cultured and mesophyll cells was examined. The best conditions of seed germination and growth of callus were achieved on Hyponex medium contained plant growth regulators(2mg/l 2, 4-D, lmg/l Kinetin). Viability and regeneration of cell wall in protoplasts was determined with fluorescence microscope. Also, fused protoplasts were achieved by using PEG solution between protoplasts of cultured and mesophyll cells.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.58 no.1
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• pp.1-7
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• 2013

The purpose of this study was to provide basic information for breeding cowpeas (Vigna unguiculata L.) by investigating the crop characteristics of 245 accessions of cowpea collected in Korea and abroad. All specimens flowered within 41 to 50 days (51.5%) or 51 to 60 days (43.7%) of sowing and matured 21 to 30 days (53.9%) or 31 to 40 days (23.7%) from flowering. Thus, the total time from sowing to maturity was either 71 to 80 days (26.9%) or 81 to 90 days (23.4%) for all specimens. The accessions were classified into indeterminate type (72.7%), intermediate type (25.7%) and determinate type (1.6%) based on growth; prostrate type (78.8%) and erect type (21.2%) based on plant type; heart shape (98.4%) and lanceolate (1.6%) based on leaflet shape; and purple (85.2%), white (13.6%) and light green (1.2%) based on corolla color. The accessions were classified into brown (54.7%) and yellowish brown (37.6%) based on color at pod maturity; and downward (90.6%), middle (5.7%) and standing upright (3.7%) based on pod setting position. Seed coat color varied as 25.3% were brown, 23.3% were black, and 20.8% were white. Seed shape also varied as 66.9% were egg-shaped, 24.9% were rectangular and 8.2% were kidney-shaped. Pod lengths ranged from 10.1-20.0 cm and from 20.1-30.0 cm in 89.0% and 8.6% of specimens, respectively. There were 12.1-15.0, 9.1-12.0, and 15.1-18.0 seeds per pod in 62.0%, 25.7% and 9.1% of specimens, respectively. The weight of one hundred seeds ranged from 15.1-20.0 g (37.6%) and 10.1-15.0 g (28.6%). Seed yields per plant were 100.1-200.0 g (52.7%), less than 100 g (22.9%), and 200.1-300.0 g (15.9%). The starch content in the seeds of the seven selected resources ranged from 44.1 to 57.0% while the protein content ranged from 23.3 to 27.5% with significant differences. The sucrose content ranged from 1.46 to 2.03%, also with significant differences.