• Journal of Korea Soil Environment Society
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• v.3 no.2
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• pp.127-145
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• 1998

Unlike water or air quality standards that have been established by legislation using potential human health impact as the primary criterion, soil quality depends on the soils primary function and its relevant environmental factors, which is much more site- and soil specific. A properly characterized soil quality assessment system should serve as an indicator of the soil capacity to produce safe and nutritious food, to enhance human and animal health, and to overcome degrative processes. For our proposed example, a high quality soil with regard to maintaining an adequate soil productivity as a food production resources must accommodate soil and water properties, food chain, sustainability and utilization, environment, and profitability, that (i) facilitate water transfer and absorption, (ii) sustain plant growth, (iii) resist physical degradation of soil, (iv) produce a safe food resources, (v) cost-effective agricultural management. Possible soil quality indicators are identified at several levels within the framework for each of these functions. Each indicator is assigned a priority or weight that reflects its relative importance using a multi-objective approach based on principles of systems to be considered. To do this, individual scoring system is differentiated by the several levels from low to very high category or point scoring ranging from 0 to 10, And then weights are multiplied and products are summed to provide an overall soil quality rating based on several physical and chemical indicators. Tlne framework and procedure in developing the soil quality assessment are determined by using information collected from an alternative and conventional farm practices in the regions. The use of an expanded framework for assessing effects of other processes, management practices, or policy issues on soil quality is also considered. To develop one possible form for a soil quality index, we should permit coupling the soil characteristics with assessment system based on soil properties and incoming and resident chemicals. The purpose of this paper is to discuss approaches to defining and assessing soil quality and to suggest the factors to be considered.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.02a
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• pp.486-493
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• 2002

본 연구에서는 정밀시비를 위한 전자지도 작성 시스템을 개발하고, 질소 시비량 지도를 작성하였다. 개발된 토양 유기물 함량 계측 센서는 0.07%~7.96%가지의 토양 유기물 함량을 $R^2$= 0.85, SEP=0.72, bias=-0.13으로 계측할 수 있었으며, 작성된 시비량 지도를 이용한 시비는 58.7%의 정확성을 보였다. 시비량 지도에 의한 정밀시비는 획일적인 시비의 정밀시비 30.5%에 비해 91%의 정확성 향상을 보였다. 그러나 개발된 센서의 오차로 인하여 유기물 함량 등급 분류 간격이나 격자 간격 면에서 세분화된 지도는 작성할 수 없었다. 좀 더 정확하고 세분화된 시비량 지도 작성을 위해서는 오차 범위가 작은 정밀한 센서의 개발이 요구된다. 또한 토양 유기물 센서뿐만 아니라 다른 토양 상태를 계측할 수 있는 센서들이 개발된다면 다양하고 정확한 시비량 지도를 작성할 수 있을 것으로 판단된다. 작성된 전자 지도는 농작업의 의사결정에 도움을 주며, 빠른 처방이 가능할 것이다.

• Journal of The Korean Society of Grassland and Forage Science
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• v.5 no.2
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• pp.93-99
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• 1985

All soil characteristics for 10,077ha of establishable grassland in 1984 were statistically summarized. Soils could be classified into 5 of Order, 7 Suborder, 11 Great group, 28 Subgroup, and 105 Series by the new comprehensive classification system. Distribution rate of farm houses managed the extent magnitude of 3.0ha was 70.8% and its total extent was 35.9%. Extent rate of uncultivated method was 71.3%. These soils were distributed with regard to hilly land and mountain foot slope at, 82.0, and to 0-30% slope at 66.9%. Soil texture was light such as sandy loam to loam at 85.0%, available soil depth more than 20cm at 97.8%, and gravel content less than 35% at 98.4%. Soil would be distributed in 67.3 of first class, 29.7 second class, and 3.0% third class for suitability. Mean values of pH, available $P_2O_5$, OM, Ca, Mg and K for topsoil were 5.6, 31ppm, 3.2%, 2.23me/100gr, 1.05me/100gr, and 0.37me/100gr, respectively.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2002.09a
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• pp.89-91
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• 2002

본 연구는 소수성 유기물로 오염된 지하수를 복원할경우, 식품등급의계면활성제와 NaOH 또는 NaCl 의 효과를 연구하기 위하여 주상실험을 실시하였다. 실험결과 게면활성제와 NaOH의 혼합 사용이 가장 효과적이었으며, $Na^{+}$의 counter-ion 효과보다는 OH-의 pH효과가 더욱 중요한 인자가 됨이 밝혀졌다.

• Proceedings of the Korean Society of Grassland Science Conference
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• 1999.06a
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• pp.80-80
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• 1999

본 연구는 목초지 및 야초지에 자생하는 주요초종에 대해 생태적 반응(생태가)를 부여하여 식생구성에 의한 초지의 토양 환경생태를 평가하는데 기여코자 하였다. 각 초종에 대한 생태가는 수분가 1-12, 토양반응가 및 질소가를 각각 1-9 등급으로 구분하였으며 먼저 우리나라의 초지 및 산지초지에서 발생빈도가 높은 141 초종에 대해서 생태가를 부여하였다.(중략)

• Magazine of the Korean Society of Agricultural Engineers
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• v.53 no.1
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• pp.27-40
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• 2011

토양정보는 식량생산, 지속적인 토지이용 계획, 종다양성 평가에 사용되는 기본적인 자료이다. 우리나라 토양조사의 역사, 다양한 축척의 토양도 구축과 토양검정, 토양도와 토양검정 자료의 특성, 농업환경변동 모니터링을 통한 일반농경지 및 취약농경지 토양, 토양정보의 전산화에 따른 토양데이터베이스와 토양정보시스템 소개, 구축된 토양정보의 활용과 향후 방향에 대해 논하였다. 40여년 동안 수행되었던 국책 토양조사사업 결과 두 종류의 토양 데이터베이스가 구축되었는데, 다양한 축척의 토양도(1:250,000, 1:50,000, 1:25,000, 1:5,000)를 GIS DB로 전산화한 수치토양도 DB와 필지 단위로 조사된 화학성 위주의 토양분석 성적을 구축한 토양비옥도 DB이다. 흙토람(http://soil.rda.go.kr)에 서 제공하는 토양전자지도는 총 111종으로 토성, 경사, 지형, 모재, 배수등급, 자갈함량, 유효토심 등 토양 GIS 주제도 50종, 사과, 배, 마늘, 수박 등 작물 재배적지 61종이고, 82종의 토양통계 정보를 제공하고 있다. 최근 에는 친환경농업육성법 시행령에 따른 경작형태 및 오염원별 농경지 토양의 이화학성 및 농업용수 수질 조사 자료를 GIS DB로 구축하여 공간적인 분포와 시계열적인 변화를 분석하는 자료로 활용하고 있다. 농업환경변동 정보는 농업환경자원 인벤토리를 기반으로 일반농경지의 화학성과 농업용수의 수질, 토양 미생물 등의 공간적인 분포와 시간적인 변화 정보를 전문가 그룹에 제공하고 있다. 앞으로는 자연자원의 분포와 변동 정보를 바탕으로 보다 일반적이고 알기 쉽게 가공하여 일반인들에게 농업환경과 자연자원 보전의 중요성을 이해시키는 정보로 제공할 예정이다. 기존의 토양정보와 농업환경정보를 통합하여 컨텐츠를 보다 내실있게 하고 정보 수요자별로 손쉽게 목적에 맞는 접근을 할 수 있는 시스템을 만들어 사용자의 편의성을 강화시키는 방향으로 이끌어 가고자 한다.

• Journal of Soil and Groundwater Environment
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• v.13 no.3
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• pp.37-44
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• 2008

Soil ecology has important roles in global ecosystems. However, soil ecological quality information is being ignored when assessing ecological impact of construction actions. And methods for classifying and assessing soil ecological quality have been very little established in comparison to those for animal and plant ecosystems. In this study, it was examined whether soil ecological quality information has influence on determining an eco-friendly route for a road construction project. For this, sensitivity analysis was systematically performed by varying the relative significance (weights) of soil ecological quality information among natural environmental and ecological factors. When the weight of soil ecological quality was greater than just 14%, the soil ecological quality information significantly influenced the determination of the eco-friendly routes for a specific road construction project. This demonstrates that soil ecological quality information has to be considered for more reliable environmental impact assessment, and also supports the validity of use of soil ecological quality information and its mapping technique in planning and siting of eco-friendly construction projects.

• Korean journal of applied entomology
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• v.52 no.4
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• pp.327-333
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• 2013

Plant parasitic nematodes were isolated from 274 soil samples collected from soybean fields in Korea. Nematode importance rating in soybean is proposed based on this study and by reviewing other reports. Soybean cyst nematode, Heterodera glycines is the most important nematode species and rated as $1^{st}$ because it detected from 38%(range 25-51%) of soil samples with high density except Jeju province. Root-knot nematode, Meloidogyne spp. is rated $2^{nd}$ and is more widely distributed in southern provinces, Gyeongnam, Jeonnam, and Jeju province (detection rate ranged 16-44%). Pratylenchus is rated $3^{rd}$ and is more frequently detected from northern provinces such as Gyeonggi and Gangwon (detection rate ranged 10-13%). Helicotylenchus is rated $4^{th}$ and is particularly important in Jeju province (detection rate is 62% and numbers averaged 571 nematodes/$300cm^3$ soil), which is the main production area for sprouting soybean in Korea. Tylenchorhynchus, Paratylenchus, Criconema, Criconemoide, Mesocriconema, Ogma, Xiphinema, Paratrichodorus, and Trichodorus occur in low frequency and density, thus they are rated to $5^{th}$. We propose to delete following nematode genus from the list of soybean parasitic nematode in Korea because their parasitism on soybean is unconfirmed or negligible; Tylenchus, Aphelenchus, Aphelenchoides, Ditylenchus, Hirschmanniella immamuri, Basiria graminophila, Psilenchus, and Pseudhalenchus. Therefore, we revised 30 species in 16 genera as soybean parasitic nematodes in Korea. Importance rating is $1^{st}$ Heterodera glycines, $2^{nd}$ Meloidogyne spp., $3^{rd}$ Pratylenchus spp. and $4^{th}$ Helicotylenchus spp. especially in Jeju province.

• The Korean Journal of Ecology
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• v.22 no.1
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• pp.21-29
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• 1999

This study was carried out to clarify the syntaxonomy of the pine forest in Youngdong region by the phytosociological methods. As a result of the investigation of 62 quadrats, Pinus densiflora forest was classified into four subassociations: Typical subassociation, Quercus mongolica subassociation, Rhododendron mucronulatum subassociation, Rhus chinensis subassociation. Many differences in ecological characteristics such as species composition, stratum structure, vegetation coverage and of diameter at breast height(DBH) of class distribution were found among the communities. Soil properties of the pine forest on the study area was relatively poor compared with other pine forests, especially, soil pH was strongly acidic with 4.87. Soil conditions among the subassociations appeared different. Future succession of pine forest by the similarity index of communities was proposed. Estimated degree of green naturality for Typical subassociation and Q. mongolica subassociation correspond to 7th grade, and R. mucronulatum subassociation, 8-1st grade, and R. chinensis subassociation, 8-2nd grade.

• Korean Journal of Soil Science and Fertilizer
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• v.42 no.2
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• pp.88-97
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• 2009

This study was conducted to obtain the basic information to increase the practical use of soil survey data through the subdividing of lava shapes with soil sequences due to different elevations in Jeju. The numbers of soil series of lava topography had occupied many of whole soil series in Jeju. When its topography subdivide, it give more detailed soil information. The obtained results are as follows; The lava topography to subdivide lava topography were studied with 38 soil series according to elevation in Jeju. Division of elevation are less than 50m, 50m to 200m, and 200m to 400m and more than 400m. Name the depending on elevation, less than 50m is called lower part of lava, 50m to 200m is called middle part of lava, and 200m to 400m and more than 400m are called upper part of lava. The characteristics of lava subdivide are as follows; soil family texture of lower part of lava is fine silty to clayey, drainage classes are various, average of available soil depth is 75.3cm, average of gravely contents are 11.6%, average of slopeness is 7.2%, limiting factor are various and soil order are various. soil family texture of middle part of lava is fine silty to coarse silty, drainage classes are well to very well, average of available soil depth is 65.9cm, average of gravely contents are 14.7%, average of slopeness is 11.3%, limiting factor are ashy and soil order are Andisols and Inceptisols. Soil family texture of upper part of lave is fine silty, drainage classes are well, average of available soil depth is 72.8cm, average of gravely contents are 16.0%, average of slopeness is 14.9%, limiting factor are ashy and skeletal, and order are Andisols.