• 한국유기농업학회지
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• 제20권4호
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• pp.607-618
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• 2012

Dasineura oxycoccana는 미국, 캐나다, 유럽 등에 분포하는 해충으로, 블루베리에 발생할 경우 신초와 꽃눈을 가해하여 막대한 피해를 유발하는 주요 문제 해충이다. 국내에서는 2010년 경기도 화성시 블루베리 재배지에서 유사증상이 발견되어 피해조사 및 정밀동정을 실시한 결과 D. oxycoccana에 의한 피해로 확인되어 블루베리혹파리로 명명하였고 검역관리해충으로 지정되었다. 2011년 전국적인 조사 결과 대부분 블루베리 재배지역에서 블루베리혹파리 발생 및 피해가 확인되었다. 시설 비가림 재배 농가에서 건조한 펄라이트나 친환경 부산물인 왕겨 등을 이용하여 블루베리혹파리 유충 및 번데기 증식에 불리한 물리적 환경조건을 조성함으로써 블루베리혹파리 발생 및 그에 의한 신초 피해를 감소시킬 수 있어서 블루베리혹파리의 친환경 방제 수단으로 활용 가치가 높았다.

• Agribusiness and Information Management
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• 제8권1호
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• pp.1-10
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• 2016

Information and communication technologies (ICTs) have always mattered in agriculture too. In day-to-day practices of agriculture and allied sectors, the farmers often share their information. Changing weather patterns, soil conditions, pests and diseases always throw challenges to small and marginal farmers. So, the farmer needs up-dated information to cope with and even benefit from these changes. In the developing countries like India, where agriculture still plays a crucial role (over 58% of the rural households depend on agriculture as their livelihood) and the rising population from 1027 million to 1419 million during 2001-16 (a total rise of 38 percent or 1.3 percent per year) pose a lot of pressure on land and other resources to meet the food security needs on one hand and to meet the challenges of globalization on the other. Understanding and addressing these challenges are very crucial, in which ICT can play a major role. With the booming mobile, wireless, and Internet industries, ICT has found a foothold even in poor marginal and smallholder farms and in their activities. The survey conducted among the 120 farmers in Srikakulam district in India revealed that, ICT has revolutionized the agriculture in the modern days. Production and marketing information is accessed by 91% of the sample farmers through mobile in 2015, where it was only 5% in 2005. The extent of use of mobile phones by the farmers varied with the decision to be taken by them like Harvesting, packing, and storing (94%), Selling Decision (91%), Seed purchase (89%), Application of fertilizers and pesticides (88%) and Land preparation and planting (84%), other package of practices (77%). The farmers further opined that, 'Voice' was the dominating source of communication (96%) compared to Short Message Service (SMS) (only 27%) and Internet access (10%), as majority are illiterate. The use of camera (71%), Bluetooth (33%), Radio (61%) TV (41%) are the other means of sharing the information. In this context of importance of ICTs in Indian agriculture, greater attention justifies about the applications of ICT's to alleviate poverty and promote economic growth of the farming population.

• 농촌계획
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• 제8권1호
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• pp.3-14
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• 2002

Changes of chemical properties by times of the reclaimed tidal land soils and soil surface water, underground infiltration water with precipitation-runoff on natural meteological condition in the unripened tidal reclaimed paddy fields were investigated. This study was carried out to use environment-friendly farm land in the reclaimed tidal lands. The soils used in this study were saline-alkaline soils with the high $Na^+$ and $Mg^{++}$ content. As the results of investigation outflow loading of nutriments through outflow water in the unripened tidal reclaimed paddy fields by precipitation during the survey period, nutriments equivalent to T-N $1{\sim}2\;kg\;10a^{ -1}$ and T-P $0.01{\sim}0.02\;kg\;10a^{-1}$ from in the unripened tidal lands were discharged. Besides, the results of comparison losses of cation through outflow water showed $Na^+>\;K^+>\;Mg^{++}\;>\;Ca^{++}$, and the highest appeared water discharge of $Na^+$. In case of saemangeum reclaimed tidal land soils water discharge of cations showed $Ca^{++}$ 1.3 kg $10a^{-1}$, $Mg^{++}$ 1.6 kg $10a^{-1}$, $Na^+$ 17.7 kg $10a^{-1}$, and $K^+$ 3.2 kg $10a^{-1}$ respectively. On the other hand, in case of koheung reclaimed tidal lands soils water discharge of cations showed $Ca^{++}$ 18.1 kg $10a^{-1}$, $Mg^{++}$ 31.2 kg $10a^{-1}$, $Na^+$ 320.8 kg $10a^{-1}$ and $K^+$ 51.2 kg $10a^{-1}$ respectively.

• 한국측량학회지
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• 제32권spc4_2호
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• pp.421-430
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• 2014

항공영상, 위성영상 및 초분광영상은 농업, 산림, 수계 해안, 지질, 토지피복 지도 작성 등에 널리 이용되고 있지만, 지적분야에서 이들의 활용은 거의 나타나지 않고 있다. 한편 해외에서는 항공 위성영상의 지적도와 중첩이나 지목의 등록 및 갱신과 관련된 연구 사례들이 보고되고 있다. 이에 본 연구에서는 초분광영상을 지적 분야 적용성 검토결과, 기존 지목 오류 조사를 위한 현장 공간정보 취득 수단으로 활용될 수 있을 것으로 판단되며 향후 다목적 지적 구현 시 지적정보와 융합할 수 있는 농업, 토양, 그리고 식생 등의 속성정보 취득에 기여할 것으로 사료된다.

• 한국지반환경공학회 논문집
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• 제13권10호
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• pp.85-94
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• 2012

최근의 건설공사는 개발사업의 증가와 국토의 효율적 개발에 의해 인접시설물과의 충분한 이격거리를 확보하지 못하고 공사를 진행하는 경우가 점차 증가하고 있다. 본 연구에서는 초고층빌딩 개발을 위한 지반 굴착공사와 철도시설 공사가 비슷한 시기에 수행된 지역에서 발생한 인접 철도시설물의 피해사례를 소개하고, 지층 특성과의 상호작용을 고려한 효율적인 보수 보강이 시행된 사례를 소개하고자 한다. 이를 위해 철도시설물 시공 시와 초고층빌딩 시공을 위한 굴착 공사 시 각종 현장조사 및 시험들이 수행되었으며, 이를 토대로 철도시설물과 선로의 침하 원인 분석이 시행되었다. 추가적으로 지반의 공극 충진을 통한 지반보강과 철도구조물의 침하복원을 위해 마이크로 시멘트를 적용한 보강 그라우팅 공법이 수행되었다.

• 한국환경교육학회지:환경교육
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• 제11권2호
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• pp.69-82
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• 1998

This study was performed to investigate the trends in Environmental Education Research of Korea. In this study, the papers in $\ulcorner$Hwankyungkyoyuk$\lrcorner$ (Journal of the Korean Society for Environmental Education) and $\ulcorner$Journal of the Korean Association for Research in Science Education$\lrcorner$ from the initial number to the latest number were investigated. The category of analysis in this study were the number of papers, research area, method, character, the major targets of Environmental Education, the major targets of research, the purpose of Environmental Education, and the contents of environment. The results of this study are as follows: 1. The number of papers in $\ulcorner$Hwankyungkyoyuk$\lrcorner$ were 178 and in $\ulcorner$Journal of the Korean Association for Research in Science Education$\lrcorner$ were 406(10 of them were related in environmental education) 2. The research areas of the papers were Environmental Education(52.4%), Social Environmental Education(19%), Environmental Science(8.5%), Science Education(7.9%), and Social Education(3.2%). 3. The major parts of the method of the papers were literature review(31.7%), survey research(21.2%), and descriptive study(20.3%). 4. More than half of the character of the papers were research on the actual condition(35.4%) and consciousness (17.9%), 5. The major targets of Environmental Education of the papers were secondary school students(33.9%) and elementary school students(18.8%). 6. The major targets of researches of the papers were secondary school students(33.8%), teachers(30.0％), the general public(20.0％), and elementary school students(18.8%). 7. The purpose of Environmental Education of the papers were Values and Attitudes(31.2%), Behaviors and Participations(29.6%), Knowledges and Informations(27.2%), and Skills(12%). 8. The contents of Environment of the papers were waste(27.7%), water quality(15.2%), the whole environment(12.5%), air quality(9.8%), natural environment(5.4%), soil(4.4%), energy(4.4%), and so on. The results indicated that the Environmental Education research of Korea were needed to be reinforced in the field of qualitative research method, teaching and learning strategy, the development of learninyg meterals, and teacher education.

• Safety and Health at Work
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• 제6권1호
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• pp.18-24
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• 2015

Background: In 2006, three farmers died at the bottom of an agricultural shallow well where the atmosphere contained only 6% oxygen. This study aimed to document the variability of levels of oxygen and selected hazardous gases in the atmosphere of wells, and to identify ambient conditions associated with the low-oxygen situation. Methods: A cross-sectional survey, conducted in June 2007 and July 2007, measured the levels of oxygen, carbon monoxide, hydrogen sulfide, and explosive gas (percentage of lower explosive limit) at different depths of the atmosphere inside 253 wells in Kamphaengphet and Phitsanulok provinces. Ambient conditions and well use by farmers were recorded. Carbon dioxide was measured in a subset of wells. Variables independently associated with low-oxygen condition (<19.5%) were identified using multivariate logistic regression. Results: One in five agricultural shallow wells had a low-oxygen status, with oxygen concentration decreasing with increasing depth within the well. The deepest-depth oxygen reading ranged from 0.0% to 20.9%. Low levels of other hazardous gases were detected in a small number of wells. The low-oxygen status was independently associated with the depth of the atmosphere column to the water surface [odds ratio (OR) = 13.5 for 8-11 m vs. <6 m], depth of water (OR = 0.17 for 3-<8 m vs. 0-1 m), well cover (OR = 3.95), time elapsed since the last rainfall (OR = 7.44 for >2 days vs. <1 day), and location of well in sandy soil (OR = 3.72). Among 11 wells tested, carbon dioxide was detected in high concentration (>25,000 ppm) in seven wells with a low oxygen level. Conclusion: Oxygen concentrations in the wells vary widely even within a small area and decrease with increasing depth.

• 자연과학논문집
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• 제8권1호
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• pp.87-92
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• 1995

대전시 신대동 일반 폐기물 매립지역 주변토양의 Cu, Pb와 Zn 함량은 대부분이 우리나라 토양내의 평균 함량보다는 높은 것으로 나타났으나 농작물을 통하여 인류 및 동물에 해를 끼칠 수 있는 정도는 아닌 것으로 나타났다. 지하수의 경우 Cu, Pb와 Zn이 검출되지는 않았고, F, CI, $NO_2$, $NO_3$ 및 $SO_4$함량도 음용수 수질기준보다 낮은 것으로 나타났다. 그러나 매립지 인근 D지역에서의 지하수의 pH가 5.58로 나타나 음용수로는 부적합 것으로 판명되었다. 전기 비저항 탐사를 행한 결과 토양오염이 진행된 지역에 함수층이 존재하고 있었으며 침출수의 배출에 의한 오염체의 이동에 의해 전기 비저항값이 더욱 낮게 나타났다. Gradiometer를 이용한 자력탐사 결과 전기비저항값이 낮은 오염지역에서 자력치와 그 미분값의 이상치가 나타났으며, 그 지점 지하수의 원소함량이 다른지역보다 높았다.

• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2008년도 공동학술대회
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• pp.37-40
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• 2008

준설해사를 이용하여 성토된 방조제 제체 매질에서 채취한 시료에 대하여 전기비저항을 실측하였으며, 소형루프 전자탐사의 1차원 역산 자료를 비교 분석한 결과 높은 상관성이 나타남을 확인하였다. 이러한 소형루프 전자탐사결과를 콘관입시험 결과와 비교하여, 비저항값과 콘저항치와의 상관성을 분석하였다. 분석 결과 준설해사로 성토된 방조제의 경우 1 ohm-m 이하의 비저항값이 나타나는 구간과 콘저항치가 50 $kgf/cm^2$ 이하로 매우 낮은 값을 나타내는 구간이 일치하는 것으로 나타났다. 따라서 향후 준설해사로 성토된 방조제의 경우 정기적인 비저항 모니터링의 결과를 활용한 유지 관리 업무에 활용이 가능한 것으로 나타났다.

• 농업과학연구
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• 제45권2호
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• pp.177-184
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• 2018

The frost heave process from repeated freezing and thawing actions in winter on forest road cut-slopes is important for forest road maintenance and management. This study investigated the damages of the forest heave process on forest road cut-slopes by measuring the changes in the road-cut surface elevation and sediment production and by conducting vegetation surveys which were aimed at providing information for forest road maintenance plans. The temperature and humidity differences were determined between the north and south cut-slopes. T-test showed that the north slope had a lower temperature and humidity than that of the south slope. Field observations also confirmed frozen soils on the north slopes, indicating that the north slopes are susceptible to frost heave. Sediment was converted to dry weight per unit area ($g/m^2$). T-test showed that the north slope produced more sediment than that of the south slope. The study confirmed that more frost heave occurred on the north cut-slopes than on the south cut-slopes. Vegetation surveys were conducted on five cut-slope plots. Considering the dominant species found above the cut-slopes, vegetations in all the plots are expected to succeed to pine and oak in the future. The dominant species appearing on the cut-slopes of the study area were exotic species because the elapsed time of the site was only 2 - 4 years.