• Plant Disease and Agriculture
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• v.2 no.1
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• pp.50-60
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• 1996

최근에 농업기술의 발달로 작물의 재배환경과 재배기술 또한 날로 개선되어 가고 있으나 농촌 인력의 부족과 재배자의 고령화로 인한 토양 비배 관리의 소홀, 화학 비료의 과다 및 편중 사용, 토양 산도 변화에 따른 작물의 영양 흡수 불균형으로 인한 생리적 장해의 발생과 하우스 재배면적의 증가로 인한 연작장해의 발생이 심각한 문제로 대두되고 있다. 본 강좌에서는 지난 호의$\mathbb{\ulcorner}$영양생리 장해의 발생현황과 발생조건$\mathbb{\lrcorner}$에 이어 작물재배시에 발생하는 각종$\mathbb{\ulcorner}$영양생리 장해의 진단$\mathbb{\lrcorner}$방법을 소개한다.

• Plant Disease and Agriculture
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• v.2 no.2
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• pp.23-29
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• 1996

최근에 농업기술의 발달로 작물의 재배환경과 재배기술 또한 날로 개선되어 가고 있으나 농촌인력의 부족과 재배자의 고령화로 인한 토양 비배 관리의 소홀, 화학 비료의 과다 및 편중 사용, 토양산도 변화에 따른 작물의 영양 흡수 불균형으로 인한 각종 생리적 장해의 발생과 하우스 재배면적의 증가로 인한 연작장해의 발생이 심각한 문제로 대두되고 있다. 본 강좌에서는 $\mathbb{\ulcorner}$영양생리 장해의 발생현황과 발생조건$\mathbb{\lrcorner}$과 $\mathbb{\ulcorner}$영양생리 장해의 진단$\mathbb{\lrcorner}$에 이어 작물 재배시에 발생하는 각종 $\mathbb{\ulcorner}$영양생리 장해의 대책$\mathbb{\lrcorner}$을 소개한다.

• Korean Journal of Soil Science and Fertilizer
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• v.18 no.2
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• pp.177-188
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• 1985

To clarify the characteristics and genesis of clayey terrace soils in Yeongnam area, macro-morphological features and soil profile development indexes were investigated with the sequential soils in Yeongcheon (inland region) and in Yeongil (coastal region). The results are summarized as follows; 1. According to the physiogaphy and landuse, the terrace soils were discernible to well drained yellowish red (5 YR) profile of higher terrace (Bancheon series), moderately well drained reddish yellow (7.5 YR) profile of middle terraces (Upyeong and Hwadong series), and lower terraces (Deogpyeong and Geugrag series) which were moderately well to imperfectly drained by paddy-fication. 2. The roundness and sphericity of the gravels contained in the terrace deposits were ranged around 0.543-0.546 and 0.723-0.722, respectively. The rounded to well rounded gravels were resemble to typical alluvial origins. 3. The amount of clay minerals formed in the soil horizons per 100g of parent materials were 50.8-30.7g while the rates of the clay leached were 30.1-7.4%, and the higher terrace had the more leaching rates. 4. The index of profile development of the terrace soils ranged from 37.95 to 22.01 and the index were positively correlated with relative elevations of the soils. The rates of clay leaching were positively correlated with the ratios of clay in the illuvial horizons to elluvial horizons. 5. A similarity was observed among cumulative grain size curves of the terrace soils, but the patterns of recalculated silt free cumulative grain size curve of terrace deposits in Upyeong soils in Yeongil area were abruptly different from down layer that suggest the soil to have bisequum profile.

• Journal of Wetlands Research
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• v.12 no.1
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• pp.1-14
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• 2010

Changes in wetland soil properties of two constructed wetlands after their constructions were compared to those of a natural wetland to determine if they could be used for the evaluation of the success of constructed wetlands and the assessment of their functions. One natural wetland as a reference wetland and two constructed wetlands(treatment wetland and experimental wetland) with different contaminant inflow characteristics were selected for this study. Major physicochemical properties of wetland soil such as soil texture, water content, pH, CEC(cation exchange capacity), organic matter content, total nitrogen, and available phosphorus were monitored to investigate the effects of inundation and accumulation of organic matters and nutrients on the wetland soil development. There was a clear difference in soil texture between the natural wetland and the constructed ones, with the high sand content in the constructed wetlands as compared to the high clay content in the natural one. Gradual increases of silt and clay contents over time were observed in the constructed wetlands. The soil of the natural wetland was higher in water content and organic matter but lower in pH than those of the constructed wetlands. The pH of the constructed wetlands reached near neutral ranges after initial increase. CEC and nutrient concentrations of the constructed wetlands seemed to be affected mainly by outside inflows of organic matter and contaminants. Concentrations of organic matter and nutrients decreased over time in the experimental wetland where surface and deep soils with different characteristics were mixed during its construction, suggesting that changes in soil properties during wetland constructions may affect the development of wetland soils or wetland biogeochemistry. This study showed that changes in physicochemical properties of soils in constructed wetlands could be used to assess the success of constructed wetlands and their functions, and also the importance of reference wetlands for the appropriate assessment.

• Korean Journal of Soil Science and Fertilizer
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• v.44 no.6
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• pp.1272-1278
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• 2011

This study was conducted to reclassify Cheongweon series based on the second edition of Soil Taxonomy and to discuss the formation of Cheongweon series distributed on broad continental alluvial plains. Morphological properties of typifying pedon of Cheongweon series were investigated and physico-chemical properties were analyzed according to Soil survey laboratory methods manual. The typifying pedon of Cheongweon series has dark grayish brown (2.5Y 4/2) silt loam Ap horizon (0~18 cm), dark grayish brown (2.5Y 4/2) silt loam BA horizon (18~30 cm), dark yellowish brown (10YR 4/6) silty clay loam Bt1 horizon (30~60 cm), strong brown (7.5YR 4/6) silty clay loam Bt2 horizon (60~91 cm), brown (10YR 4/4) silt loam BC horizon (91~104 cm), and mottled (7.5YR 4/6, and 7.5YR 5/2) silt loam C horizon (104~160 cm). The typifying pedon has an argillic horizon from a depth of 30 to 91 cm and a base saturation (sum of cations) of 35% or more at 125 cm below the upper boundary of the argillic horizon. It can be classified as Alfisol, not as Incceptisol. It has udic soil moisture regime, and can be classified as Udalf. Also that meets the requirements of Hapluadalf. It has anthraquic condition, and keys out as Anthraquic Hapludalf. That has fine silty textural family, and has mesic soil temperature regime. Therefore Cheongweon series can be classified as fine silty, mixed, mesic family of Anthraquic Hapludalfs, not as fine silty, mixed, mesic family of Fluvaquentic Epiaquepts.

• Proceedings of the Mineralogical Society of Korea Conference
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• 1996.10a
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• pp.53-60
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• 1996

일본 토양의 유황 함량은 변이 폭이 매우 크다. 화산회에서 발달된 갈색삼림토양은 유황이 풍부한데 특히 북해도, 동북 및 기타 화산지역에서 그러하다. 일본에서 주요 쌀 생산지인 저평탄지대 역시 유황 함량이 높다 따라서 이 지역에서의 유황부족 현상은 발생되지 않는다 그러나 이러한 지역에서도 집약재배가 이루어지면서 토양에서 유황의 적정 수준을 지키기 위하여 유황 시용을 권장하고 있다. 반대로 남서부의 적황색토 지대의 해안선의 모래땅 및 일부 충적토양에서는 유황 함량이 매우 낮아 이 지역에서의 작물생산은 함유황비료를 시용 하지 않는 한 유황부족으로 영향을 받게 된다. 대기로부터 $SO_2$가스의 공급에도 불구하고 지난 20년간 유황공급은 꾸준히 감소되어 왔으며 함유황비료 사용이 극도로 감소함에 따라 작물생산에서 유황의 중요한 역할을 농업관리 실행계획에 포함시킬 필요가 있다.

• Journal of the Speleological Society of Korea
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• no.62
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• pp.1-9
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• 2004

The main purpose of this paper is to clarify the relationship between the development of the Uro cave and the characteristics of the landform development. The mountain systems of the study area are north-western part. central part and south-eastern part. The third order streams are developed, and the bifurcation ratios are 7.0 and 4.0. The drainage density and the networks of the streams are not well developed in this area. The rocks of this area are sedimentary rocks, metamorphic rocks and Igneous rocks. The soils are lithosol, and red-brownish soils.

• Journal of the Speleological Society of Korea
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• no.88
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• pp.51-62
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• 2008

동굴내부의 지형변형은 동굴내의 외인적인 요인과 내인적인 요인에 의하여 발달된다. 외인적인 요인으로서 기후변동에 의한 기온의 변화와 침출수의 증감 및 외부 이입물질 등을 들 수 있으며, 내인적인 요인으로서는 암석의 공극율, 지질환경, 단층 및 습곡면의 형상, 절리 및 균열면의 유무, 동굴지천의 구배 및 유속, 층리간의 이종의 암석게재 여부 등을 들 수 있다. 동굴 시스템은 수문 물리화학적 요소에 의해 형성되며 외부 기준면 통제에 의해서 암석학, 구조학, 기후학, 생물학, 토양학 등과 밀접한 상태에서 의존적인 발달 과정을 가진다. 동혈 내부의 침식은 유수의 입력 경우 유출과정에서 형성되며, 또한 유수의 비 입력 경우유출 및 액체용액의 분출에 의해서 형성된다. 다수의 동굴학자들은 동굴은 계절마다 침수되거나 빨리 흐르는 홍수에 의한 폭우에 의해 epiphreatic 상태에서 간헐적으로 포화되는 과정을 거치며 선택적으로 발달한다고 주장하고 있다. 혼합지대 동굴의 가장 좋은 예는 현재의 카르스트 지역에서 나타나는 것이 아니라 과거 제4기의 200만년전 동안보다 해수면이 더 안정적이었던 때에 이루어진 고 카르스트(Paleo Karst)에서 발견되고 있다.

• Journal of the Korean earth science society
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• v.25 no.8
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• pp.764-773
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• 2004

The soil in wildfire area Sacheon-myeon, Gangneung, Gangweon Province, Korea, were investigated to clarify pattern of the soils. The soils were classified into 5 types on the basis of vegetation, types of organic matter. thickness of soil horizons, and completeness of soil profile. Each type showed different erosion pattern and Landsat ETM image. Coverage of plant leaves, litter, root, ash and other organic matter was an important component that affected soil color and reflectance of Landsat image (digital number). Although the NDVI (Normalized Distribution Vegetation Index) method in the wildfire area did not show much difference in soil types, the applied supervised classification method showed characteristic pattern of Landsat ETM image of soil types. This study showed that the applied supervised Landsat TM image classification in wildfire area is an effective way to estimate the distribution of erosion pattern of soil in wildfire area.

• Korean Journal of Soil Science and Fertilizer
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• v.4 no.1
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• pp.67-73
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• 1971

This paper has been made for the soil micro-morphological study of Sirye series. The results are summarized as follows: 1. By high biological activity, soil materials are mixed. Pedotubules and Fecal pellets pedological features are formed by this activity. 2. There are no strong illuviation cutans. The formation of dirty cutans (new cutans) are due to sedimentation in furrow. 3. The relatively thick crystallization of goethite in plane voids are formed. 4. The lower parts of this soils are influenced by hydromorphology. 5. B3 horizon may be buried A horizon, containing the fragments of upper horizons.