• Landscaping Tree
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• s.126
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• pp.51-56
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• 2012

수목의 건전한 생육과 좋은 수형을 위해서는 어릴 때부터 적절한 전정을 하는 것이 중요하다. 처음 1~2년 동안의 생장시기에는 모든 수목의 전정 방법이 거의 같지만 2년차 겨울부터는 수목 형태에 따른 차별화된 전정이 필요하다. 좋은 수형을 위해서는 이미 수형이 정돈된 어린 나무를 구입하여 이용해도 편리하나 아직 수형이 잡혀 있지 않은 경우에도 적절한 전정을 한다면 원하는 수형으로 가꾸어 나갈 수 있다. 수목을 고르거나 어떻게 전정할지를 결정하기 전에 먼저 원하는 수형과 부지의 한계를 고려해야 한다. 또한 수목이 성장했을 때의 최대 높이와 너비를 반드시 확인하는 것이 중요하다. 다음은 어린나무의 성장단계별 전정과 관목 및 생울타리 전정기술을 요약한 것이다.

• Journal of The Korean Society of Grassland and Forage Science
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• v.22 no.4
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• pp.297-302
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• 2002

This study was carried out to compare the agronomic characteristics, forage yield, and quality of four sorghum $\times$ sudangrass hybrids at Yonam College of Agriculture Experimental Livestock Farm, Sunghwan in 2001. The four recommended hybrids used in this study were ‘SXl7’ and ‘877F’(heading type), and ‘TE Evergreen’ and ‘Turbo 9’(headless type). sugar content or heading hybrids(SX17 and 877F) were higher then that of headless hybrids(TE Evergreen and Turbo 9). SX17 had resistance to lodging, while all hybrids had resistance to foliar disease and insect. Dry matter(DM) and total digestible nutrients (TDN) yields of heading hybrids were higher then those of headless hybrids. Among sudangrass hybrids, DM and TDN yields of 877F were the highest(21,007 and 12,276kg/ha). The crude protein of Turbo 9(10.5%) was higher than other hybrids. Neutral detergent fiber(NDF) content of headless hybrids were higher than that of heading hybrids, while acid detergent fiber(ADF) and acid detergent lignin(ADL) contents of headless hybrids were lower than those of heading hybrids. Calculated TDN of headless hybrids were higher than that at heading hybrids. Cellulase digestible of organic matter of dry matter (CDOMD) of headless hybrids also were higher then that of heading hybrids. Results of this experiment indicates that heading hybrid was better than headless hybrid in the agronomic characteristics and forage yield of sorghum $\times$ sudangrass. However heading hybrid was lower than leafless hybrid in quality of sorghum $\times$ sudangrass.

• Journal of the Korean Institute of Landscape Architecture
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• v.16 no.2
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• pp.1-7
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• 1988

Predicting treeform should be very important, eventhough it is difficult, step for landscape designers. This study was carried out to develop a method to classify the treeforms of landscape plants by numerical data. Twenty five treeforms are selected to be compared with 41 Zelkova serrata MAKINO, 26 Pinus strobus L., and 44 Magnolia denudata DESROUX. Statistical judgement was made by using X$^2$-Test. The results are summerized as follows. 1. Zelkova serrata was classified as B3 or C3. This species showed a tendency of changing from A type to B or C type, and the CL/CH ratio(canopy length/canopy height) is thought to be increased as aged. 2. pinus strobus was classified as D4-D5 and the CL/CH ratio tends to be increased as aged. 3. Magnolia denudata was classified as D4 and the change by aging was not observed clearly.

• Journal of Bio-Environment Control
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• v.25 no.3
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• pp.206-211
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• 2016

Modified T trellis (MT) and Wakeman trellis (WT) were widely used Korean vineyard because they had an advantage for spur pruning type cultivar such as Campbell Early. In this experiment, we compared labor time and intensity for bunch management between MT and WT trellis systems in 'Campbell Early' grapes. As a result, berry thinning was required 17.3 hours (10a) on the WT trellis but was required 12.3 hours (10a) on the MT trellis. In like manner, bagging was required 10.1 hours (10a) on the WT trellis but was required 8.2 hours (10a) on the MT trellis. On the other hand, labor intensity measured on berry thinning and bagging practices using REBA (Rapid Entire Body Assessment) index, then WT trellis was scored 13.0, but MT trellis was scored 8.6. Meanwhile, MT trellis reduced vigorous growing of internodes length and width on grapevine shoots. Consequently, MT trellis is more convenience trellis for working ergonomically in Korea vineyard.

• Journal of the Speleological Society of Korea
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• no.87
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• pp.1-7
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• 2008

Jeju-do is an oval-shape volcanic island spanning 73km east to west and 31km north to south. The 1,950meter high, Mt. Halla is the centerpiece of unique landscape of Jeju Island, Sloping gently downward toward the coastline. The most of lava tree-molds are appeared at the below of 300m on Mt. Halla. There are many lava tree-molds in Weullim-ri, Hallim-eup. Vertical tree-molds, recumbent tree-molds are distributed widely in Hallim-eup area. By the observation of shape and structure, lava tree-molds can be classified into, recumbent tree-molds and capture tree-molds, fragmental tree-molds, compounded tree-molds, vertical tree-molds.

• Proceedings of the Korean Society of Grassland Science Conference
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• 1999.06a
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• pp.100-100
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• 1999

본 시험은 수단그라스계 잡종의 라운드배일 사일리지 조제 가능성에 대한 기초자료를 확보하기 위하여 실시하였다. 공시품종은 출수형인 G83F 및 GW9110G, 그리고 비출수형인 TE-Evergreen을 이용하였고 사일리지 조제전 1일간 예견한 후 라운드베일 사일리지로 조제 한 후 2개월간 보관하였다. 건물 함량은 비출수형인 TE-Evergreen에서 27.7%로 가장 낮았으며 출수형인 G83F 및 GW9110G의 건물 함량은 각각 37.1 및 33.8%로 높았다.(중략)

• Korean Journal of Plant Resources
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• v.30 no.5
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• pp.565-570
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• 2017

In a plumcot 'Harmony' cultivar, which is an interspecific hybrid between plum and apricot, canopy occupation and productivity according to tree training system, Y shape with no trellis (YNT) and Y-palmette with trellis (YPT), were compared. According to the survey results for 5 years of planting, tree growth was similar in two training systems. However, canopy occupation and fruit yield of YPT were significantly higher than those of YNT. The fruit weight and sugar content were not significantly different between two systems. The fruit drop rate tended to be lower in YPT than in YNT. From the above results, it is expected that the YPT type will contribute to the increase of canopy occupation and fruit yield and reducing the fruit drop rate compared to the YNT.

• Journal of The Korean Society of Grassland and Forage Science
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• v.32 no.3
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• pp.293-300
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• 2012

This experiment was carried out to compare the agronomic characteristics, forage yield and quality of sorghum ${\times}$ sudangrass hybrid at two locations (Sungju and Cheonan) in 2009. The experiment was a randomized complete block design with three replications. The eight recommended hybrids used in this experiment were 'Sordan 79', 'SX17', 'Honey chew', 'Honey grazer', 'G7', 'Jumbo', 'Green star' and 'GT56' hybrids. The heading of four hybrids were headed at both region, Sungju and Cheonan. There are no big differences in general agronomic characteristics among hybrids, but brix scale of heading and BMR (brown mid rib) types were higher than those of other hybrids. Dry matter (DM) and plant height of heading type hybrids were higher than those of headless types. The fresh, DM and TDN (total digestible nutrients) yields of heading type hybrids were also higher than those of headless types, and BMR types were lower than others. The crude protein and crude ash contents of headless hybrids were higher than those of heading hybrids, while its non-fiber carbohydrate (NFC) content showed the opposite results. The acid detergent fiber (ADF) and NFC contents of BMR types were lower than others. The results of this experiment indicates that heading hybrids were more higher than headless hybrids in the agronomics and forage yield of sorghum ${\times}$ sudangrass. However heading types were lower headless types in quality of sorghum ${\times}$ sudangrass. And BMR hybrids were also high quality of sorghum ${\times}$ sudangrass hybrid because of higher brix content and lower ADF content among tested hybrids.

• Nuclear industry
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• v.8 no.4 s.62
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• pp.76-78
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• 1988

스펙트럼천이 신형전환로 (이하 신형전환로)는 표준 가압수형원자로의 로심과 로심주변을 변형한 원자로이다. 신형전환로와 기존 가압수형원자로와의 다른 점은 핵연료집합체설계와 원자로내부구조인데, 신형전환로 로심은 기존의 가압수형원자로와 유사한 구조의 핵연료집합체로 구성되어 있으나 주요한 차이는 사각형이 아니라 육각형으로 되어 있다는 점이다.

• 전기의세계
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• v.16 no.2
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• pp.25-32
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• 1967

현재 기술적및 경제적으로 입증된 동력로로는 미국에서 연구개발된 비등수형 원자로(BWR)와 가압수형 원자로(PWR), 그리고 카나다에서 개발된 중수감속 비등경 수냉각로(CANDU-BLW)등 사종을 들 수 있다. 1970년대 중기에는 한국에서도 최초의 원자력발전소가 가동될 전망이므로 상기 제종의 기술성, 경제성, 안정성등을 조사연구해야 될 것이다. 우선 지면관계로 가장 우리의 흥미를 끄는 PWR에 대하여 그 기술적 개발현황과 앞으로의 전망에 관하여 분석 검토코저 한다.