• Journal of Korean Society of Forest Science
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• v.46 no.1
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• pp.10-20
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• 1980

This experiment was carried out to investigate the effects of physico-chemical properties of soil on the growth of Chamaecyparis obtusa and to apply the results to such rational forest management as yield forecast and selection of suitable species for a given forest stand. The soil properties observed in this experiment were soil pH, exchangeable pH organic matter, total nitrogen, available $P_2O_5$, cation exchange capacity, exchangeable $H^+$, total base and base saturation. Diameter at breast height (DBH), height and volume growth of C. obtusa were observed at 78 sampling sites. Data were processed into the following series for the analysis of multivariates : inner correlation matrix, multiple correlation coefficients, regression coefficients and partial correlation coefficients. The results are summerized as follows : 1. Multiple correlation coefficients between soil properties and DBH of C. obtusa were .364 for 20-year trees, resulting less efficient for estimating the growth of C. obtusa. However, total base, soil pH and base saturation were considerable characters for better estimation. 2. More efficient multiple correlation coefficients were observed between soil properties and height growth than those between soil properties and DBH, showing .443 for 20-year trees and factors affecting the height growth were similar to those of DBH. 3. Extremely low values of multiple correlation coefficients were estimated between physico-chemical properties of soil and volume growth of C. obtusa resulting low efficient estimation. However, total base contributed highly to volume growth of C. obtusa. Accordingly the most contributable factor for estimating the growth of C. obtusa were total base, soil pH and base saturation. Consequently, these results can be effective for selecting of the reforesting site, and less effective for estimating the growth of C. obtusa.

• Korean Journal of Soil Science and Fertilizer
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• v.6 no.4
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• pp.227-230
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• 1973

To elucidate the effect of the organic carbon compounds included in a separate from glutamic acid fermentation residue (G. A. F. R) on the improvement of the physico-chemical properties of soil, on a soil low in organic matter content, treated with G. A. F. R and compost, observations on the total organic matter, humic acid, fulvic acid, C. E. C. and the development of aggregates were made. From the results of the investigations it was concluded that, the organic carbon compound in the tested G. A. R. F. is more effective than compost in increasing the total organic matter, humic acid, fulvic acid and C. E. C. of soil and in enhancing the development of soil aggregates.

• Korean Journal of Soil Science and Fertilizer
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• v.8 no.1
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• pp.19-23
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• 1975

In order to find out the effect of long-term annual additions of organic matter on the physico-chemical properties of paddy soil, the soil with and without compost application has been analysed. 1. There was no significant difference in the particle size distribution between compost and uncompost treatment, however, hydraulic conductivity, sedimention volume were remarkedly increased in compost. 2. Bulk density and soil strength were decreased in organic matter additions, but porosity increased. 3. Relative to Atterberg Limits, liquid limit, plastic limit, and elastic index were increased in compost. 4. Aggregate size distribution was slightly increased in additions of organic matter. 5. Regarding to chemical properties, pH, organic matter content, C.E.C. and extractable cation were increased in organic matter additions.

• Journal of Korea Soil Environment Society
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• v.3 no.3
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• pp.3-10
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• 1998

Acid/Base buffer capacity of soil is very important in prediction of contaminant transport for its direct impact on pH change of the system composed of soil-contaminant-water, In this research, diffuse double layer theory as well as two layer electrostatic adsorption model are applied to develop a theoretical model of buffer capacity of soil. Model application procedures are presented as well. Buffer capacity of Georgia kaolinite and Milwhite kaolinite was measured by acid-base titration. Model prediction and experimental results are compared.

• Korean Journal of Soil Science and Fertilizer
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• v.7 no.4
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• pp.227-234
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• 1974

A survey on the vinyl house soils was conducted to investigate the salt accumulation status and it's effects on the deterioration of soil aggregates. The survey was made for the vinyl house soils in Suwon, Yesan, and Kimhae areas where vegetables are extensively grown under a vinyl house. Physical and chemical properties of the soils at the inside and outside of the vinyl house were compared to continuous vegetable cropping. Electrical conductivity of the soil solution (Y) in vinyl house was closely related to the number of cropping years (X), and the relations are given by the following regression equations: $Y=0.54X{\times}1.44$ ($r=0.580^*$) for loamy textured soils and $Y=0.58X{\times}2.61$ ($r=0.524^*$) for clayey textured soils. Electrical conductivity of the soils, where vegetable cropping in winter and rice in summer were rotated, was lower than that given by the regression equations. Analyses for extractable cations, the concentration of calcium, sodium and potassium was high in the inside vinyl house soils compared to the outside. Soil aggregates larger than 1mm in diameter were greatly deteriorated, while the content of the soil aggregates smaller than 0.5mm in diameter remained unchanged. Aggregate stability of the soil was negatively correlated to the accumulation rate of extractable sodium ($r=-0.681^{**}$), potassium ($r=-0.528^*$) and the amount of daily irrigated water (r=-0.477), while positively correlated to the content of organic matter ($r=-0.692^{**}$) and calcium (r=0.391).

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1988.05a
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• pp.45-46
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• 1988

• Proceedings of the Korean Environmental Sciences Society Conference
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• 1997.10a
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• pp.152-153
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• 1997

• Magazine of the Korean Society of Agricultural Engineers
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• v.29 no.2
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• pp.74-81
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• 1987

지표에서 토양속으로 흐르는 물의 침수를을 동심원관형침수계를 사용하여 측정하였다. 내부관과 외부관을 비교함으로서 침투율 측정시 침투계 바깥쪽으로 흐르는 수평방향으로 흐름을 예상할수 있으며 서로 다른 초기함수조건에서 침투율을 측정, 비교함으로써 초기함수 상태의 침투율에 대한 영향을 고찰하였다. 측정치를 분석한 결과 예상한 대로 바깥쪽으로 흐르는 수평방향의 토양수분으로 인하여 외부관에서의 침투율이 내부관에서 보다 평균90% 컸으며, 또 초기 함수량이 작은 경우가 큰 경우보다 침투율이 켰다. 침수가 끝난 후 재분배시의 토양 수분 흐름은 수리지표를 검사함으로써 추정하였다.수평 및 수직방향의 수리지표는 다단 텐시오미터(multiple-depth tensiometer)를 사용하여 토양속의 공극수압을 측정하여 계산하였다 수리지표를 검사한 결과 재분배시 수평방향의 토양수분 흐름은 일정한 방향이 아니라 경우에 따라서 원관 침투계의 중심쪽으로 또는 바깥쪽으로 흘렀다. 이느 토양의 물리적 성질이 장소에 따라서 균일하지 않았음에 기인한 것이라 판단된다. 재분배시 수평 및 수직방향의 평균수리지표의 비율을 검사한 결과 시간이 경과할수록 비율이 감소 되었으며 또 깊이가 깊어질수록 감소하였다.이는 즉 시간이 지날수록 깊이가 깊어질수록 토양수분 흐름의 수평방향 성분이 감소한다는 것을 나타낸다.

• The Microorganisms and Industry
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• v.16 no.3
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• pp.48-55
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• 1990

Land treatment를 이용한 폐수와 폐기물의 성공적이며 안전한 처리는 토양에서의 적절한 생물학적, 물리적, 화학적 반응들이 일어날때 이루어지며 이를 위해서는 처리해야할 폐기물과 토양의 성질에 따라 적절한 공정의 설계가 따라야할 것이다. Land treatment는 다른 물리화학적 처분방법에 비해 약간 느리고 불완전하다 할지라도 비용이 저렴하고 또한 landfill이나 deepwell injection등 토양을 이용한 다른 처분방법에 비해 지하수나 인근지역의 오염, 가스발생 등의 문제점이 훨씬 적다. 토지의 반복적인 처리장 부지로서의 사용 후에는 경우에 따라서는 농작물이나 가축사육용 초지로 이용할 수 있고 농경지로 이용 못할 경우에는 공원이나 건축용부지, 체육시설 등으로 이용이 가능하므로 우리나라에서도 정유, 식품공장 등지에서 폐기물의 처리및 처분방법으로 시도해 보는 것이 바람직하다고 생각된다.

• Journal of the Korea Organic Resources Recycling Association
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• v.2 no.2
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• pp.77-88
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• 1994

This experiment was carried out to investigate the effect of sewage sludge compost amended soils on the growth and accumulation patterns of heavy metals in plant parts of Orchardgrass seedlings, changes in physical properties and chemical composition, and heavy metal residue in soils. Mixture ratios of sewage sludge compost and soil(loam) were 100:0, 80:20, 60:40, 40:60, 20:80 and 0:100(control), respectively. The results obtained were as follows; 1. The physical properties and chemical compostion of soils were improved by increase in mixture ratios of sewage sludge compost. 2. The biological yield of Orchardgrass seedlings was increased with mixture ratios of sewage sludge compost. 3. The dry weight of shoot(SH) was increased with both of yield components(NT and WT) and biological yield of Orchardgrass seedlings. 4. The total nitrogen concentrations(TN) of plants was increased with quadratically up to the biological yield of 100% mixture ratio of sewage sludge compost. 5. Lead(Pb) concentration of soil in over the 60% mixture ratios of sewage sludge compost were in excess of limiting level(50ppm) of organic fertilizers.