• Korean journal of applied entomology
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• v.56 no.4
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• pp.427-434
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• 2017

The susceptibility of Dermanyssus gallinae adults, collected from poultry farms in 5 regions, to 11 acaricides was investigated. When bifenthrin and formic acid with pyridaben were diluted 100 times, bifenthrin showed 100% acaricidal activity; however, formic acid with pyridaben showed less than 20% acaricidal activity for poultry farms in 3 regions (Gyeongju, Chilgok, and Geumsan) except Yeoncheon and Anseong. The carbamate compound, carbaryl showed 100% acaricidal activity in most of the regions, except Gyeongju. A phosphorus compound, dichlorvos showed 100% activity in most of the regions, yet 66.7% acaricidal activity in Yeoncheon. The susceptibility of D. gallinae from poultry farms in Yeoncheon and Anseong to most acaricides was high; however, in the other farms, the susceptibility of D. gallinae varied depending on the acaricide. Clothianidin, thiamethoxam, fenitrothion, and formic acid with pyridaben showed differences in acaricidal activity among regions. Therefore, farmers should concentrate during the selection of these acaricides. However, carbaryl, cartap hydrochloride, dichlorvos, and bifenthrin showed high activity against D. gallinae collected from poultry farms in five regions. Therefore, these acaricides could be used in most of these regions. To control D. gallinae effectively, the alternation of acaricides is necessary, and indiscriminate pesticide use should be avoided. Therefore, this study can serve as a basis for controlling D. gallinae.

• Korean Journal of Heritage: History & Science
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• v.45 no.1
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• pp.102-121
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• 2012

The purpose of this study is to verify homoteneity of soil and earthenwares and identify firing temperature of earthenwares excavated from Yeoncheon Hapsuri: two earthenwares of the New Stone Age(YCP-1, YCP-2); two of the Bronze Age(YCP-3, YCP-4); and four of the Three States Age(YCP-4~8). The comparative analysis of soil (YCRM) and the earthenwares displays that soil geochemical patterns were similar to YCP-1, YCP-3, YCP-5, YCP-6, YCP-7 and YCP-8. On the other hand, YCP-2 and YCP-4 did not show the similarity to the one of soil because they had been enriched with MgO by contained talc and chlorite. Based on the absorption rate, specific gravity, structural characteristics and XRD analysis, firing temperature has been estimated: for YCP-7 and YCP-8 was $870^{\circ}C$ or over; for YCP-2 and YCP-4 $800^{\circ}C$ or below; and for YCP-1, YCP-3, YCP-5 and YCP-6 between 800 and $870^{\circ}C$. Mineralogical analysis displays that the geochemical pattern of the soil is coincide with the one around Yeoncheon Hapsuri site, which also shows similarity to the one of earthenwares. Such result persuades that the excavated earthenwares were produced with the soils within the precinct of the archaeological sites.

• Journal of Practical Agriculture & Fisheries Research
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• v.7 no.1
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• pp.64-73
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• 2005

This study was done to determine the regional adaptability of Dioscorea opposita in Korea. Suwon, Chunchon, Kangneung, Yonchon and Taean had soil pH of 6.62, 5.65, 5.9, 5.9 and 5.82, respectively, being at more unfavorable conditions than a standard soil condition for yam with pH 6.2. The amounts of organic matter in Suwon, Chunchon, Taean, and Yonchon were 1.96%, 4.51%, 3.76%, 1.89% and 1.12%, respectively, being at more favorable conditions than a standard organic matter in soil for yam with 2.0~3.0%. As the results from cultivating of large plantings in different regions, Suwon showed the largest the tuber dry weight of 135g. In comparison of general component between round yam and short yam in the area of Kangneung, protein of round yam(3.30%) was higher than that of short yam(1.40%). Dryness in round yam(36.5%) was lower than that of short yam(28.9%), indicating a higher dry weight ratio of round yam. In tuber extracts analysis, saponins content was respectively 23.7mg/g in round yam and 10.4mg/g in short yam.

• Korean Journal of Heritage: History & Science
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• v.56 no.4
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• pp.270-286
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• 2023

This article is about the conservation and use cases of Horogoru, a Goguryeo site located in Wondang-ri, Jangnam-myeon, Yeoncheon-gun in Gyoenggi Province. After Horogoru was excavated, it was decided to build a park around it as a way to prevent damage, and also to plant sunflowers to symbolize the sun. Naming the park 'Tong-il Balagi Park', which refers to the wish for unification, local residents and other related organizations jointly opened the site. Afterwards, they looked for ways to utilize the location and park, and chose to hold the 'Tong-il Balagi Festival'. The festival is an event held under the leadership of local residents, which has the effect of promoting both conservation and cultural property, as well as generating economic benefits. In other words, the Yeoncheon-gun, Jangnam-myeon Tong-il Balagi Festival can be said to be an exemplary example of successfully overcoming various disadvantages associated with the border area near the ceasefire line through local residents' own utilization of cultural property.

• 농업기술회보
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• v.43 no.2 s.503
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• pp.31-36
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• 2006

열의 있는 전국 190명의 선도농가 겨울농민대학 수료/부산 기장군 김석희 대표 2006겨울농민대학 21명 추천/괴산군지회,의정부·양주시지회, 연천군지회 지방농 민대학 열어 조직 활성화 발판마련/고양일산 김보연 대표회우 벽제농협조합장 이임식 가져/흑염소 세미나 개최/대전·충남연합회 이문섭 회장 뇌출혈로 입원

• KOREAN POULTRY JOURNAL
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• v.54 no.10
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• pp.112-115
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• 2022

현재 농촌의 고령화, 코로나-19로 인한 외국 인력 감소 등으로 농장 운영에 인력의 문제가 커지고 있다. 인력 자율화를 위해 스마트 축사에 대한 수요와 지원사업이 커지는 가운데 양계산업에도 자동화시스템, 스마트 축사에 대한 관심이 계속되고 있다. 이에 본지는 자동화 시스템을 넘어선 ICT 사업으로 최적의 사양관리로 경쟁력을 강화하고 있는 경기 연천군의 팜메이존의 진용일 대표를 만났다.

• Korean Journal of Environment and Ecology
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• v.14 no.4
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• pp.296-302
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• 2001

계룡산국립공원 연천봉고개(해발 700m)를 중심으로 남향사면인 시원사~원천봉고개와 북향사면인 갑사~연천봉고개를 대상으로 사면방향과 해발고에 따른 교목층과 아교목층의 산림구조를 조사분석하였다. 남향사면은 북향사면에 비하여 교목측의 밀도는 높은 반면 평균흉고직경은 작았다. 특수한 지형인 주능선부에 위치하는 정부를 제외하며, 해발고가 높아짐에 따라 교목층과 아교목층 전체의 평균흉고직경과 흉고단면적인 남향사면에서는 감소하는 경향을 보였다. 북향사면은 남향사면에 비하여 교목층과 아교목층 전체의 동다양도와 균재고가 높았다. 남향사면에서 해발고가 높아짐에 따라 중요치가 증가하는 수종은 느티나무, 졸참나무, 까지박달, 신갈나무등이었으며, 중요치가 감소하는 수종은 굴참나무, 서어나무, 때죽나무 등이었다. 북향사면의 경우 해발고가 높아짐에 따라 중요치가 증가하는 수종은 까치박달, 쪽동백나무 등이며, 중요치가 감소하는 수종은 때죽나무, 졸참나무 등이었다. Cluster 분석결과 남향사면중, 하부의 굴참나무-낙엽활엽수군집지, 남향사면 상부와 북향사면상, 중의 신갈나무-낙엽활엽수군집, 북향사면 하부와 정부의 신갈나무-소나무군집 등 3개 군집으로 구분되었다. 굴참나무, 산벚나무, 밤나무 등 3개 수종간에는 유의적인 정의 상관이 있었으며, 유의적인 정의 상관을 보인 굴참나무, 산벚나무, 밤나무 등 3개 수종은 당당풍과 유의적인 부의 상관이 있었다.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.04a
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• pp.31-31
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• 2019

서부 민통지역은 육군 제 1사단, 육군 제 25사단, 육군 제 28사단 관할지역에 걸쳐있다. 경기도 파주시 민통지역은 육군 제1사단 관할지역으로 장단면, 군내면, 진동면을 포함한다. 연천군 반정리는 육군 제 25사단 관할 지역 내에 있다. 본 조사에서는 장단면 일대와 군내면 정자리 덕진산성, 진동면 동파리 일월봉, 임진강변, 수내천, 세월천을 중심으로 세 개 면과 연천군 장남면 반정리의 식물상을 조사하여, 서부 민통지역의 주요 식물들의 분포를 자세히 파악하고자 하였다. 2012년 4월부터 2018년 10월까지 조사를 통해 463점의 표본을 확보하였고, 총 96과 307속 415종, 3아종, 45변종 6품종의 469분류군이 확인되었다. 조사 시기 중 멸종위기종은 발견되지 않았으며, 우리나라 특산식물로는 고려엉겅퀴, 벌개미취, 키버들 등 7분류군이 확인 되었다. 식물구계학적 특정종으로는 Ⅴ등급 통발을 비롯, IV등급 8종, III등급 11종, II등급 11종, I등급 16종이 발견되었다. 서부 민통지역에서 확인된 외래 및 귀화식물은 단풍잎돼지풀을 포함한 35분류군으로 전체 식물의 7.5%에 해당한다. 최근 무분별한 개발로 인한 민통지역 자연자원의 보전대책 수립도 요구된다.

• Journal of the Korea Organic Resources Recycling Association
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• v.12 no.4
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• pp.105-111
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• 2004

When the clitellate tiger worms(Eisenia fetida) were fed with paper mill sludge, sewage sludge of agricultural-urban area and sewage sludge of agricultural area, number of cocoons produced by individual clitellate earthworm for 104 days were 11.8, 8.6 and 3.5, respectively. However, clitellate earthworms that had been fed with sewage sludge of agricultural-urban area for 52 days or fed with sewage sludge of agricultural area for 95 days could not produce cocoons, whereas the earthworms that were fed with paper mill sludge kept producing cocoons through the investigating period. The hatchability of cocoons produced by the clitellate tiger worms(Eisenia fetida) fed with sewage sludge of agricultural-urban region, sewage sludge of agricultural region and paper mill sludge were 42.8%, 38.3% and 39.2%, respectively. And hatching periods of cocoons were 33.8~36.0 days, which were not affected by the kinds of sludges. However, the cocoons produced by clitellate earthworms which had been fed with sewage sludge for about 1.5 months could not hatch at all. Death rates of second generation hatched from cocoons produced by tiger worms(Eisenia fetida) which had been fed with the sewage sludge from agricultural-urban region and the sewage sludge from agricultural region reached to 100% and 90% at 60 days after hatching, respectively, whereas death rate of second generation fed with paper mill sludge reached to 16%.

• Economic and Environmental Geology
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• v.55 no.6
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• pp.633-648
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• 2022

Gravity data were analyzed to identify the cause of clustered seismicity that occurred intensively in Yeoncheon, located in the central part of the Korean Peninsula. Our analysis suggests that the En echelon faults developed in the northwest-southeast direction. In addition, in the eastern part of the Dongducheon Fault, it was interpreted that high-density lower bedrock intermittently lifts close to the surface due to vertical tectonic movement accompanied by a flower structure. The fracture zone of the Dongducheon Fault is estimated that the width is about 200 m, the depth is at least 5 km, and the density is about 15% lower than the adjacent rocks. It is analyzed that the shallow earthquakes that occurred within 5 km depth was concentrated along the low-density En echelon fault fracture zone developed between the high-density rocks intruding close to the surface. Therefore, the earthquakes can be interpreted as the result that the north-south stress caused by the dextral tectonic movement of the Dongducheon Fault activated the En echelon fault in the northwest-southeast direction.