• Title/Summary/Keyword: daeseo

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Comparison of the Chemical Properties of Soil and the Main Components of the Southern Ecotype Garlic Cultivar Cultivated in the Volcanic or Nonvolcanic Ash Soil of Jeju Island (제주의 화산회토양 및 비화산회토양에서 재배한 난지형 마늘의 주요성분과 토양의 화학적 특성 비교)

  • Kim, Ju-Sung;Ra, Jong Hwan
    • Horticultural Science & Technology
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    • v.34 no.4
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    • pp.549-556
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    • 2016
  • In this study, we analyzed and compared the constituents of Southern ecotype garlic cultivars, Namdo and Daeseo garlic, cultivated in volcanic and non-volcanic ash soil in Jeju Island and compared the soil properties in these regions. The volcanic ash soil in which Namdo garlic grew had higher electrical conductivity and more available sulfur, whereas the volcanic ash soil in which Daeseo garlic was cultivated had a higher amount of organic matter and total nitrogen. Also, non-volcanic ash soil in which Namdo garlic was cultivated had higher levels of available phosphorous. Namdo garlic cultivated in volcanic ash soil had high levels of total soluble solids and a high allicin content and Daeseo garlic exhibited a higher reducing sugar content. Furthermore, amongst the macroelements found in garlic grown on Jeju Island, potassium was highest, followed by sulfur, magnesium, calcium, and sodium. Iron was the most abundant micronutrient, followed by zinc, manganese, and copper. These results will be of interest to farmers aiming to cultivate high-quality garlic.

Occurrence of Garlic Rust in Southern Regions of Korea (남부지방 마늘 녹병의 발생 현황)

  • Lee, Dong-Hyun;Hur, Jae-Seoun;Koh, Young-Jin
    • Research in Plant Disease
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    • v.9 no.3
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    • pp.121-124
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    • 2003
  • Occurrence of rust on 2 representative garlic cultivars Daeseo and N므애 in major cultivating regions of Goheung-gun, Jeonnam and Namhae-gun, Gyeongnam was investigated during 1998-1999. Rust disease severities of garlic ranging from 1.2 to 85.8 were quite different according to the investigating years and cultivars. Relatively high rust severities of garlic were observed in 1998 compared with 1999. This might be due to remarkably frequent rainfalls and high humidities during the growing seasons of garlic in 1998. Rust occurred severely on cultivar Daeseo but not on cultivar Namdo. This shows quite different susceptibility or resistance to rust among the cultivars of garlic. Increase of rust severities resulted in remarkable decrease in yields of garlic. It is assumed that rust might cause serious damages in the cultivation of garlic.

Phase Modulation Optical Delay Line for Ultrafast OCT Application (초고속 OCT응용을 위한 위상변조 광지연단)

  • Hwang Daeseo;Lee Young-Woo
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.9 no.4
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    • pp.861-864
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    • 2005
  • In this paper, we system the system design and numerical analysis of the ultrafast optical delay line using by optical phase modulator. The numerical analysis carried out with 1310nm, lops laser and electro-optic phase modulator. As the results of numerical analysis, we show a scanning rate of 0.5 GHz and a delay range of 19.0ps. Compare with mechanical delay line, the optical delay line has a high scanning speed and a high repetition rate.