• 한국토양비료학회지
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• 제47권6호
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• pp.412-417
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• 2014

Soil properties and yields of red been were investigated to establish soil suitability of Korean adzuki bean at 166 farms in Korea. The soil morphological and physical properties were investigated by 1:5,000 scale average yield of 2~3 years. The impact factors to the adzuki bean yields and soil properties were selected based on standard error of each factor. The yields of adzuki bean showed the greatest values when the morphology was alluvial plains, the drainage was well or moderately well, the slope was 2~7%, the texture was fine loamy, the gravel content was less than 15% and the available soil depth was more than 100 cm. Contribution factors of soil properties to the yields were 0.18 of morphology, 0.18 of drainage level, 0.23 of slope, 0.20 of texture, 0.11 of gravel content and 0.10 of available soil depth, respectively. Soil suitability levels were set as the best suitable land if score was greater than 90, suitable land if score ranged from 89 to 85, the possible land if the score ranged from 79 to 84 and low productive land if score was less than 78. According to the criteria 37.5% of the production area was the best suitable land, 29.4% was suitable land, 22.3% was possible land and 10.8% was low productive land. The best and suitable lands were total of 66.9% in Gyeongju, Gyeosangbuk-do.

• 한국토양비료학회지
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• 제46권6호
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• pp.542-548
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• 2013

Soil properties and yields of liriopis platyphylla were investigated to establish soil suitability of Korean liriopis platyphylla at 116 farms in Korea. Morphological and physical properties of the soils were investigated along with the average yield of 2~3 years. The impact factors of soil properties to the yield of liriopis platyphylla were selected based on standard error of each factor. The yields of liriopis platyphylla showed the greatest values when the morphology was alluvial plains, when the drainage was well or moderately well, when the slope was 0-2%, the texture was coarse loamy, when the gravel content was less than 15% and when the available soil depth was more than 100 cm. Contribution factors of soil properties to the yields were 0.15 by morphology, 0.15 by drainage level, 0.13 by slope, 0.18 by texture, 0.16 by gravel content and 0.23 by available soil depth, respectively. Soil suitability classes were set as follows; the best suitable land if score was greater than 92, suitable land if score ranged from 91 to 86, the possible land if the score ranged from 85 to 83, and low productive land if score was less than 82. According to the criteria, 17.8% of the production area was the best suitable land, 43.1% was suitable land, 17.3% was possible land, and 21.8% was low productive land. The sum of both the best and suitable lands were 60.9% of the farm area of Miryang in Gyeongsangnam-do.

• 한국토양비료학회지
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• 제47권4호
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• pp.242-248
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• 2014

We have five soil series of pan soils in South Korea out of 391 series: Gangreung, Bugog, Yeongog, Jangweon, and Pogog. Productivity decreases in pan soils as pan horizons impede percolation and capillary rise of water and interrupt root extension. This study was performed to investigate pedogenic processes of pan soils mainly located in footslope and river terrace by analyzing physicochemical properties and soil micro-morphology. Korean pan soils belong to Alfisols, Ultisols, or Inceptisols and have udic or aquic soil moisture regime, mesic temperature regime, and mixed mineral substances. Texture of pan horizons selected for the present study was mainly silty clay loam with clay contents ranging from 26.3 to 45.3%. Bulk density of the pan horizons ranged from 1.4 to $2.1Mg\;m^{-3}$ and their soil structure were subangular or angular structure. In terms of micro-morphological structure, Bt horizon of Gangreung series was formed as platy and striated b-fabric structure possibly affected by uplift of coastal terrace following clay sedimentation by flood. Jangweon series showed micro-morphology of massive structure and crystallic b-fabric as macropores between coarse debris established by debris fall in slope were filled with silt-sized particles. The Bt horizons having massive structure and striated b-fabric in Yeongog, Pogog, and Bugog series implies that those horizons experienced horizontal mass flow after clay accumulation.

• Mycobiology
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• 제49권1호
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• pp.15-23
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• 2021

Two fungal strains (KNU-JJ-1827 and KNU-JJ-1829) belonging to the class Dothideomycetes were discovered from Jeju Island, Korea during this investigation of soil microfungi. Strain KNU-JJ-1827 showed fewer conidial septations, larger conidiogenous cells, and smaller conidia compared to the previously identified closest species of Didymocyrtis. Strain KNU-JJ-1829 revealed the similar characteristics of the nearest certain species of the genus Parathyridaria with the production of conidiogenous cells and conidia, because no asexual morphs were detected from the closest type strain Parathyridaria rosae. The novelty of the strains was also confirmed by analyzing molecular data using internal transcribed spacer regions and 28S rDNA. The molecular phylogeny also strongly support the detailed description and illustration for each proposed species as Didymocyrtis septata sp. nov. (KNU-JJ-1827) and Parathyridaria ellipsoidea sp. nov. (KNU-JJ-1829) isolated from soil in Korea.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 임시총회 및 추계학술발표회
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• pp.219-222
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• 2004

Removal characteristics of Mn and Co was studied from the contaminated solutions via surface reaction with various calcium carbonate (calcite). Synthetic calcium carbonates which has different surface morphology as well as surface areas were prepared by a spontaneous precipitation method and used. Mn and Co removal behavior by the different solid surface demonstrate characteristic sorption behaviors depend on the type of calcite used, such as surface area or surface morphology. Calcium carbonate crystals (mostly calcite) which exhibit complicated surface morphology (c-type) shows strong sorption affinity for Mn and Co removal via sorption than on the a-type or b-type calcite crystals of less complicated surfaces. The applicability of two kinetic models, the pseudo-first-order kinetic equation and the Elovich kinetic model was examined on these sorption behavior. Elovich kinetic model was found more suitable to explain the very early stage adsorption kinetics, while the pseudo-first-order kinetic equation was successfully fitted for the adsorption kinetics after 50 hours.

• 한국토양비료학회지
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• 제43권5호
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• pp.696-704
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• 2010

산채류 주산단지인 강원 평창, 홍천, 횡성, 양구 등 4개 지역 53농가포장을 중심으로 실시한 세부정밀토양 조사 결과에 의해 밝혀진 토성, 배수등급, 유효토심, 지형, 경사, 자갈함량, 해발 등의 토양특성과 산채류 수량을 통하여 작물재배적지기준 설정방법인 최대저해인자법과 다변량분석법의 두 가지 방법을 비교분석하였다. 산채류재배지의 수량과 토양의 형태 및 물리적특성을 비교하여 보면 토성 (미사)식양질, 유효토심은 >100 cm, 경사는 2~15%, 지형은 곡간 및 선상지, 해발 500 m이상인 토양에서 수량이 가장 높았다. 토양특성과 산채류 수량에 미치는 기여도산출결과 경사 0.30, 해발 0.22, 지형 0.13, 배수등급 0.09 등 순으로 나타났다. 강원도 홍천군을 대상으로 최대저해인자법을 이용하여 산채류재배적지기준을 적용한 결과 최적지 0.2%, 적지 15.0%, 가능지 16.7% 그리고 저위생산지 68.0%로 나타났다. 그러나, 다변량분석법을 이용하여 산채류재배적지기준을 적용한 결과 최적지 35.1%, 적지 30.7%, 가능지 10.3%, 저위생산지 23.9%로 나타나 두 방법간에 많은 차이가 있었다. 따라서, 작물재배적지기준을 설정할 때 분석방법을 충분히 고려하여 기준을 설정할 필요가 있고, 앞으로 작물재배적지기준설정시 다변량 분석에 의한 방법을 적극 활용하는 것이 좋을 것으로 판단된다.

• 환경생물
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• 제33권2호
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• pp.215-222
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• 2015

During our investigation of ciliates from Korea, four ciliates were isolated from the non-flood Petri dish culture of soil. They were cultured under laboratory condition and studied using standard methods morphologically, including living observations, protargol impregnations, and morphometrics. The four species are Metopus hasei Sondheim, 1929, Urosomoida agiliformis Foissner, 1982, Oxytricha proximata Shibuya, 1930, and Cladotricha sp. in Nie${\ss}$en (1984) respectively.

• Mycobiology
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• 제41권4호
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• pp.256-259
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• 2013

Three isolates of Penicillium pimiteouiense were recovered from sandy beach soil samples in Penang Island, Peninsular Malaysia. All the isolates were identified based on morphological characteristics and phylogenetic analysis of internal transcribed spacer regions and ${\beta}$-tubulin gene. This is a first record of P. pimiteouiense in Malaysia.

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.335.3-336
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• 2002

To find ${\alpha}$-Glucosidase Inhibitors produced by Actinomycetes, 20 soil samples were tested and 53 Actimycetes were isolated. One of 53 Actinomycetes (strain PM718) showed very potent inhibitory activity in vitro. The morphological and physiological characteristics of strain PM 718 were investigated. The spore morphology. spore chain morphology and spore surface were observed by scanning electron microscope. The inhibitory activity of strain PM718 in vivo has been studied in mice made hyperglycemia by Streptozotocin treatment. The strain PM718 showed signficant reduction of blood glucose level(more than 30%) in mice loaded with maltose.

• Archives of Pharmacal Research
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• 제10권2호
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• pp.103-109
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• 1987

To find microorganisms producing esterase inhibitors, microbes were isolated from soil samples that were collected at different locations in Korea and screened for inhibitory activities. One of the inhibitor-producing strains was named strain DMC-498. This strain was found to be a new species of the genus Streptomyces by comparison with the characteristics of morphology and metabolisms of the other species of the genus.