• Journal of Bio-Environment Control
• /
• v.13 no.2
• /
• pp.120-123
• /
• 2004

This study was conducted to investigate the effect of brushing on overgrowth inhibition, growth, yield and starch content in spring-grown potato in the netted house. The plant growth of aerial parts was inhibited with growth stage and brushing duration. Especially, The number of lateral branches decreased greatly with brushing duration. The stem length and stem diameter were not different significantly between brushing and non-brushing on May 6. But the stem length was long in later growth stage but short in longer brushing duration. Chlorophyll content by SPAD increased with growth stage regardless of non-brushing duration and ranged from 30 to 36 mg/$\textrm{cm}^2$. The fresh and dry weight of aerial part and tuber were heavy in longer brushing duration. Starch content was higher in brushing treatment as compared to non-brushing and increased with brushing duration.

• Korean Journal of Plant Resources
• /
• v.16 no.2
• /
• pp.130-133
• /
• 2003

This study was conducted to investigate the effect of activated charcoal on growth and yield of taro in different degree of activated charcoal concentration. The results obtained are summarized as follows. Stem length was shown the longest in activated charcoal of 10-20％, but shorter in control. Also stem diameter was shown the thickest in activated charcoal of 10-20%, but thinner in control. Length of main root and thickness of main root were good in activated charcoal of 10-20%. Quality and yield of Bupleurum fatcatum was the highest in activated charcoal of 10-20%. Therefore, optimum consistency of activated charcoal was 10-20%.

• Korean Journal of Soil Science and Fertilizer
• /
• v.15 no.3
• /
• pp.156-161
• /
• 1982

In ginseng fields, soil organic matter content showed significant positive correlation with soil moisture content and root yield. Soil moisture content showed significant positive correlation with root yield, stem diameter and stem length but significant negative correlation with relative missing plant rate, defoliation and alternalia bright infection. For more than 2 Kg yield per Kan under present cultivation technique, soil moisture appeared to be greater than 17% and organic matter 2%. Many fields (58%) were below this requirement and belong to sand loam and loam soils.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.32 no.3
• /
• pp.353-356
• /
• 1987

To find out the effect of 2.4-D on growth response and fruit quality of strawberry, by leaf treatment (spray) of 120l/10a of 2.4-D(amine salt 40%) 10 ppm solution at flowering stage of 1st cluster, the experiment was carried out in the P-E film covered green-house. The strawberry plant showed the epinastic growing response with long petiole and petide and increased the evolution of ethylene from leaves and fruits after 2.4-D spraying. Therefore, the peak of picking time was accerated about 15 days according to the higher amount of ethylene evolution from strawberry plants, and the yield of fruit increased about 18% by improving the average weight of a fruit.

• Korean Journal of Optics and Photonics
• /
• v.20 no.4
• /
• pp.236-240
• /
• 2009

LED modules, based on MCPCB with a hard barrier oxide layer and an improved thermal dissipation property, are presented. Reflecting cups were also formed on the surface of the MCPCB such that optical coupling between neighboring chips was minimized for improving the photon absorption loss. LED chips were directly attached on the MCPCB by using the COB (Chip On Board) scheme. The LED modules showed significantly enhanced light outputs, compared to the LED modules based on conventional MCPCBs.

• Korean Journal of Plant Resources
• /
• v.15 no.1
• /
• pp.57-61
• /
• 2002

This study was conducted to investigate the effect of activated charcoal on growth and yield of medicinal plants in different degree of activated charcoal concentration. The results obtained are summarized as follows. Stem length was shown the longest in activated charcoal of 20%, but shorter in control. Also stem diameter was shown the thickest in activated charcoal of 20%, but thinner in control. Length and thickness of main root and thickness of main root were good in activated charcoal of 20%. Quality and yield of medicinal plants were the highest in activated charcoal of 20%. Therefore, optimum consistency of activated charcoal was 20%.

• Korean Journal of Plant Resources
• /
• v.15 no.1
• /
• pp.62-66
• /
• 2002

To investigate the critical seeding date for Daeyeupdlkkae in the middle area of Korea, we seeded from 30 April to 20 July with 20-day intervals on the experimental field in Chungbuk-Do agricultural research and extension service. As seeding date was delayed, days to emergence were shortened, flowering and maturing date were delayed, but maturing period was not significantly affected by seeding date. Delayed seed date resulted in decreased stem length, culm diameter, number of branches per plant and number of nodes on the main stem. Cluster length and 1,000 grain weight increased but number of cluster per plant and number of seed capsules per cluster decreased with delayed seeding. Seeding date up to 10 June showed no effected on grain yield, but 30 June and 20 July decreased 10% and 38%, respectively.

• Korean Journal of Plant Resources
• /
• v.10 no.4
• /
• pp.418-421
• /
• 1997

This research was performed to understand physiological and ecological characterisities and to de stable production by the way of the establishment of cultivation in elephant food. The results of the investigation of developmental characterisitics, leaf area, photosynthetic ability, chloroplast content for collective varieties are as follows. In the ecological characterisrics for five varieties of elephant food collected from domestic and foreign countries, appearance days for Japanese collective varieties was 60 days, which was two days earlier than domestic collective variety, Jechon collective variety. In appearance rate, Japanese collective variety was 90%, which was higher than Kumsan collective variety, 85%. In the development and yield of the ground portion, Japanese variety was the highest during all developmental period follwed by Chinese and Jechon collective varieties. The larger leaf area, the higher photosynthesis was found. In the amount of chlorophyll content, the higher intercepting light rate, the higher chlorophyll amount was found, which was 30, 50, 70% higher amount than non intercepting light rate.

• Journal of Korean Ophthalmic Optics Society
• /
• v.11 no.1
• /
• pp.1-5
• /
• 2006

In this study, we researched the near addition of presbyopia by the amplitude accommodation method for 40~65ages. The major findings was as follows: 1. The add power was ranged from +0.50Dptr to +3.50Dptr. 2. Add power, +1.50Dptr${\geq}$Add power${\geq}$0.50Dptr was measured in 40~44ages. 3. Add power, +2.00Dptr${\geq}$Add power${\geq}$1.00Dptr was measured in 45~50ages. 4. Add power, +3.00Dptr${\geq}$Add power${\geq}$1.50Dptr was measured in 51~55ages. 5. Add power, +3.50Dptr${\geq}$Add power${\geq}$2.50Dptr was measured in 56~65ages. 6. They put on their glasses for near purpose in 75%.

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2003.04a
• /
• pp.74-78
• /
• 2003

작물은 환경의 영향, 특히 기상조건과는 밀접한 관계가 있으며, 많은 학자들이 기상과 작물의 생육에 대한 연구결과를 보고하였다. (Kwon 등, 1989, 1993, 1994, cho등, 1979, 1984, Lee,등, 1982, Park등, 1975 ; Won등, 1983). 본 실험에서는 여수 지역의 고추수량과 기상과의 관계에 대한 기초 자료뿐만 아니라 1991년부터 2000년 까지의 기상 환경과 고추의 수량관계를 분석한 결과는 다음과 같다. 1. 월별 기상요인중 5월의 평균기온이 25.0%로 가장 높았고, 최고기온이 7.1%, 최저기온이 8.8%로 각각 높았으며, 8월의 평균기온이 6.6%, 최고기온이 6,2%, 최저기온이 6,9%로 각각 비교적으로 낮아서 변이가 적었다. 2. 생육 및 수량형질의 변이 계수에서 수량은 13.57%로 매우 높아 품종고유의 유전특성의 지배를 적게 받는 반면, 경장은 9.55%로 높아서 어느정도 환경요인에 영향을 받는 것으로 나타났다. 3. 기상요인과 수량 및 수량구성형질 간에서는 5월의 최고기온과 초장, 과장, 과경, 수량간에는 정의상관으로 유의성이 높았으며, 고추의 개화수정기간인 8월의 강수량과 초장, 과장, 수량간에는 부의 상관으로 유의성이 나타나 초기생육기인 5월의 높은기온과 개화기간인 8월의 적은 강수량이 높은 수량을 올릴수 있었다. 4. 수량과 수량형질 간에는 모두 정의상관으로 높게 유의성을 나타내었었다.