• 한국환경농학회지
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• 제41권2호
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• pp.101-107
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• 2022

BACKGROUND: Soil amendment was necessary applied for the sand that had been used to root zone of green ground in golf course because of its low water retention power and cation exchangeable capacity. This study was conducted to evaluate the effect of the mixed ratio of peat moss and coconut coir as soil amendment materials on the soil physicochemical properties applied to rootzone based on sand. METHODS AND RESULTS: The soil amendments were blended at 0, 3, 5, 7 and 10% by soil volume. The pH in the peat moss treatment was lower than that of control (0% soil amendment), and pH and electrical conductivity (EC) in the coconut coir were higher. The blending ratio of peat moss was negatively correlated with pH of rootzone soil (p<0.01), and that of coconut coir positively with EC (p<0.01). As compared with control, capillary porosity, the physical factors such as air-filled porosity, total porosity, and hydraulic conductivity of rootzone soil were increased by applying peat moss and coconut coir. For correlation coefficients between percentage of soil amendments and soil physical factors, peat moss and coconut coir were positively correlated with porosity and hydraulic conductivity (p<0.01). CONCLUSION(S): These results indicated that the application of peat moss and coconut coir affected on the change of physicochemical properties of rootzone soil, and improved soil porosity and hydraulic conductivity.

• 한국초지조사료학회지
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• 제11권1호
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• pp.22-29
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• 1991

This study was experimented to obtain the basic information on the changeable aspect and improvement of soil fertility in newly-reclaimed sloped land. Silage corn was cultivated under the six different treatments for 4 years. The relation between the amount or ratio of annual changes of soil physico-chemical properties and yield of silage corn were analyzed. Soil bulk density was decreased in 3rd year at topsoil, but that decreased in 4th year at subsoil. Soil organic matter also decreased in 2nd year at topsoil, and decreased continuously at subsoil. Bulk density and hardness of soil depths showed significant negative simple correlation with dry matter yield and cation exchange capacity showed positive. Correlation coefficient of chemical properties with dry matter yield were low. The range of annual changes of moisture percent, hardness and organic matter were wider than the other properties. The significantly different of physical properties were higher than the chemical properties, and those of topsoil were higher than subsoil. According to multiple regression between yield and physico-chemical properties of subsoil, bulk density and cation exchange capacity were in the greatest contribution at the variations, but bulk density was greatest at the ratios.

• 한국산림과학회지
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• 제83권4호
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• pp.473-479
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• 1994

본 연구는 임지의 수저류능력을 토양공극 구분에 의한 실제 이용가능수량으로 평가하여 지속적인 수자원의 확보를 위한 기초자료를 제공할 목적으로 수행하였으며, 그 결과는 다음과 같다. 1. 조공극은 임지>임간나지>초지의 순으로 높았고, 토심이 깊을수록 전공극, 조공극, 이용가능수량은 감소하는 반면, 세공극은 점차 증가하는 것으로 나타났다. 2. 토양의 공극과 이학적 특성은 지피상태별로 표층(0~20cm)에서 고도의 유의차를 보이는 반면, 토심 20~40cm와 토심 40~60cm에서는 큰 차이가 없었다. 한편, 동일 시험구에서 표층(0~20cm)과 토심 20~40cm와는 큰 차이를 보이나 토심 20~40cm와 토심 40~60cm와는 큰 차이가 없었다. 3. 전 시험구에서 이용가능수량은 조공극과 고도의 상관관계를 나타냈다. 4. 조공극량과 토심을 이용하여 나타낸 이용가능수량으로 각 지피상태별 수저류량 추정모델을 산출할 수 있었다.

• Advances in environmental research
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• 제4권3호
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• pp.183-196
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• 2015

Migration of leachate generated through embankment of construction waste soil (CWS) in low-lying areas was studied through physical and chemical analysis. A leachate solution containing soluble cations from CWS was found to have a pH above 9.0. To determine the distribution coefficients in the alkali solution, column and migration tests were conducted in the laboratory. The physical and chemical properties of CWS satisfied environmental soil criteria; however, the pH was high. The effective diffusion coefficients for CWS ions fell within the range of $0.725-3.3{\times}10^{-6}cm^2/s$. Properties of pore water and the amount of undissolved gas in pore water influenced advection-diffusion behavior. Contaminants migrating from CWS exhibited time-dependent concentration profiles and an advective component of transport. Thus, the transport equations for CWS contaminant concentrations satisfied the differential equations in accordance with Fick's 2nd law. Therefore, the migration of the contaminant plume when the landfilling CWS reaches water table can be predicted based on pH using the effective diffusion coefficient determined in a laboratory test.

• 아시안잔디학회지
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• 제5권2호
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• pp.81-86
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• 1991

The sludge, a waste of brewery industries, was examined for potentials as a natural organic fertilizer (or soil conditioner) for lawn. Trial products were measured for changes of physical, chemical properties in laboratory and seed germination and seedling growth in green house were also tested. The results are as the following:1The sludge from distilled liquor brewery contained high quantity of organic matter which had proper physical and chemical properties for lawn fertilizer (natural organic fertilizer, soil conditioner, top-dressing mix) . It showed good characteristics in handling and capabilities to be developed as commercial products for golf courses. 2.Sludge from beer company needs proper treatment to improve physical properties for futher degradiation. It is because aggregation of the sludge particles prevented microbial activities and changing to soluble form. 3.Green carbon can be used as carbon source for organic fertilizer production using brewery sludge, but it should not contain wood extract which inhibit seed germination and seedling growth.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.1194-1196
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• 2003

Variations in soil physical and chemical properties can affect agricultural productivity and the environmental implications of crop production. These variations are present and may be important at regional, field, and sub-field (precision agriculture) scales. Because traditional measurements are time-consuming and expensive, reflectance-based estimates of soil properties such as texture, organic matter content, water content, and nutrient status are attractive. Soil properties have been related to reflectance measured with laboratory, in-field, airborne, and satellite sensors. Both multispectral and hyperspectral instruments have been used, with both natural and artificial illumination. Varying levels of accuracy have been obtained, with the best results (r > 0.95) using hyperspectral reflectance data to estimate soil organic matter and water content.

• 한국토양비료학회지
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• 제43권1호
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• pp.105-112
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• 2010

벼 유기농업은 한국에서 빠르게 확산되고 있다. 유기재배에서 벼 생육은 토양 물리적 특성과 토양 미생물의 기능에 크게 의존한다. 본 연구는 무경운 답에서 유기농업을 위하여 토양 물리성과 미생물 생체량에 미치는 녹비작물의 효과를 검토하였다. 시험구는 무경운, 무경운+볏짚, 무경운+호밀, 무경운+자운영 그리고 경운구를 3반복으로 죽곡통에서 2005년 5월에서 2006년 10월까지 수행하였다. 경운구는 2005년과 2006년 모두 토양 가밀도가 가장 높은 반면 공극률은 가장 낮았다. 무경운+호밀 처리구는 공극률이 가장 높았으며 무경운 처리구의 표토 관입저항은 경운구 보다 낮았다. 담수 전 2005년과 2006년 토양 미생물 생체량 탄소 함량은 무경운+자운영 처리구가 477 mg $kg^{-1}$ 및485 mg $kg^{-1}$으로 가장 높았고 무경운+호밀 처리구는 413 mg $kg^{-1}$ 및 484 mg $kg^{-1}$였으며 경운 처리구는 363 mg $kg^{-1}$ 및 445 mg $kg^{-1}$을 나타냈다. 시기적으로 토양 미생물 생체량 탄소 함량은 유수형성기에 낮아지는 경향이었다. 연구결과 녹비작물을 시용한 무경운 재배기술은 경운에 비해 토양 공극률과 토양 미생물 생체량 탄소 함량을 크게 개선하였다.

• Geomechanics and Engineering
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• 제10권6호
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• pp.727-736
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• 2016

Excessive rainfall can cause runoff flows over the soil surface and as a consequence some amount of water will infiltrate into the soil. From a hydrologic modeling perspective it is necessary to estimate infiltration rate in order to calculate the actual runoff discharge. There are many parameters that can affect the infiltration rate such as soil texture, moisture and compaction. However, the most common equations used in hydrological calculations for estimating the infiltration rate do not consider the soil properties directly and estimate infiltration rate without any soil properties expressions. The purpose of this research was to investigate the relations between infiltration rate and soil texture, moisture and compaction. To achieve this purpose an experimental study was performed to show the effect of soil properties and their relations on infiltration rate by using non-linear regression.

• 한국토양비료학회지
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• 제47권5호
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• pp.340-344
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• 2014

Compost and gypsum can be used to ameliorate soil physicochemical properties in reclaimed tidal lands as an organic and inorganic amendment, respectively. To evaluate effects of compost and gypsum on soil water movement and retention as a soil physical property, we measured the soil's saturated hydraulic conductivity and field capacity after treating the soil collected in a reclaimed tidal land with compost and gypsum. Saturated hydraulic conductivity of soil increased when compost was applied at the conventional application rate of $30Mg\;ha^{-1}$. However, the further application of compost insignificantly (P > 0.05) increased saturated hydraulic conductivity. On the other hand, additional gypsum application significantly increased soil saturated hydraulic conductivity while it decreased soil field capacity, implying the possible effect of gypsum on flocculating soil colloidal particles. The results in this study suggested that compost and gypsum can be used to improve hydrological properties of reclaimed tidal lands through increasing soil water retention and movement, respectively.

• 한국지반환경공학회 논문집
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• 제9권4호
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• pp.37-45
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• 2008

우리나라 서, 남해안은 정규압밀 또는 약간 과압밀된 연약 점성토층이 널리 분포하고 있다. 이러한 연약지반의 효율적이고 경제적인 설계와 시공을 위해서는 사전에 공학적 특성을 상세히 파악하는 것이 중요하다. 본 연구에서는 한반도 남해안 해성점토에 대하여 자연함수비, 비중, 전체단위중량, 초기간극비, 액성한계, 소성한계, 활성도의 물리적 특성을 파악하고 토질정수간의 상관성을 규명하였다. 분석을 위하여 비교적 신뢰성이 크다고 볼 수 있는 대형 항만공사용 최근자료를 수집하여 이용하였다. 상관관계분석에서 선형회귀분석과 비선형회귀분석을 통하여 최적의 값을 도출하였다. 본 분석에 사용된 통계 소프트웨어는 SPSS(Version10.0)을 이용하였다. 분석결과 토질정수 사이의 선형및 비선형 회귀분석결과 함수비와 초기간극비의 상관성이 가장 큰 것으로 나타났으며 선형 및 누승형 회귀분석에서 동일한 결정계수를 나타내 주고 있다. 기타 다른 정수사이의 상관성은 누승식 및 지수승식 형태의 비선형 회귀분석이 선형회귀분석보다 양호한 상관성을 보여주고 있다.