Classification of Marl Soils

Jung, Chul-Min; Jung, Sochan; Bobet, Antonio

doi:10.5703/1288284314286

Cited by 3 publications

(4 citation statements)

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“…The use of AGF as a soil supporting system is gradually increasing in underground engineering applications. However, there are still many unknowns, especially in frozen marl soil [35].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Mechanical Behavior of Frozen Soils - A Case Study of Tabriz Subway

Esmaeili‐Falak

Katebi

2017

Period. Polytech. Civil Eng.

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The mechanical properties of frozen ground are key parameters in design and implementation of artificial ground freezing (AGF) in underground projects. Soil samples were obtained from the urban underground railway project site in Tabriz, Iran. The specimens were classified as SP and CL according to the USCS. The specimens were remolded in accordance with the site conditions. Over 120 triaxial compression tests were conducted on the frozen samples at different temperatures, confining pressures and strain rates. The results show that the frozen SP and CL soils exhibit strain-softening and strain-hardening behaviour, respectively. In all cases, Young's modulus increases with decreasing temperature and increasing strain rate and confining pressure. Also, the shear strength increases with decreasing temperature and increasing strain rate. In all tests, the Young's modulus and shear strength of the SP soil are greater than the CL soil. Based on the results of this research, the application of artificial ground freezing was recommended for coarse-grained and non-cohesive soils like SP in the Tabriz underground railway project.

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“…The use of AGF as a soil supporting system is gradually increasing in underground engineering applications. However, there are still many unknowns, especially in frozen marl soil [35].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Mechanical Behavior of Frozen Soils - A Case Study of Tabriz Subway

Esmaeili‐Falak

Katebi

2017

Period. Polytech. Civil Eng.

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“…Since bulk density was not measured in the monitoring program, we used the Korean soil database to derive an estimate of the bulk density. The national soil survey data, which was collected in the early 1970s, were also used to represent the average SOC content in 1970 [ Jung et al , 2000]. The survey data is represented by a soil map for the whole country at a scale of 1:25,000 describing 380 soil series.…”

Section: Methodsmentioning

confidence: 99%

“…The soil data presented in this study are not public domain; they belong to the Rural Development Administration (RDA) South Korea and the Indonesian Center for Agricultural Land Resources Research and Development (ICALRD) respectively. The South Korean national soil database (1970 data) can be obtained from the publication by Jung et al [2000]. The South Korean monitoring data is managed by RDA.…”

Section: Acknowledgmentsmentioning

confidence: 99%

Continuous rice cropping has been sequestering carbon in soils in Java and South Korea for the past 30 years

Minasny

McBratney

Hong

et al. 2012

Global Biogeochemical Cycles

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The soil system represents the dominant terrestrial reservoir of carbon in the biosphere. Deforestation, poor land management, and excessive cropping lead to a decrease in soil carbon stocks, but intensive cropping can reverse this trend. We discuss long‐term soil organic carbon data from two major rice‐growing areas: Java (Indonesia) and South Korea. Soil organic carbon content in the top 15 cm for both countries has increased in recent decades. In South Korea, the top 15 cm of soils store about 31 Tg (1012 g) of carbon (C) with a sequestration rate of 0.3 Tg C per year. In Java, the agricultural topsoils accumulated more than 1.7 Tg C per year over the period 1990–2010. We attribute the increase in measured SOC mainly to increases in above‐ and below‐ ground biomass due to fertilization. Good agronomic practices can maintain and increase soil carbon, which ensures soil security to produce food and fiber.

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“…마늘 인편 을 가을철에 파종하여 발근 후 노지에서 월동을 시키 는데 이는 마늘의 분구와 인편형성에 저온요구도를 충 족시킬 필요가 있기 때문이다 (Bandara et al, 2000). (Jung et al, 2000). 생태형이 다른 마늘은 휴면타파 요구도가 다르고 재배 시의 온도 여건에 따라 출현 특성이 다르 다고 알려져 있다 (Lee, 1974;Park and Lee, 1990).…”

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A Simple Emergence Model of Southern Type Garlic Based on Temperature

Moon¹,

Choi²,

Son³

et al. 2014

Korean Journal of Agricultural and Forest Meteorology

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We developed a simple model to predict emergence time and emergence rate of southern type garlic using the daily mean temperature. Emergence rate of garlic was decreased and emergence time was delayed on higher temperature than optimum temperature of 12.7 o C. In the model, firstly daily emergence rate was calculated using a beta function to input daily mean temperature, then the percentage of garlic emergence was calculated using a nonlinear model with accumulated emergence rate. The model was good to describe the experimental data of growth cabinet. Also it can explain well the experimental data using temperature gradient tunnel, designed for verification of model performance. But there are 5 days of deviation between estimated and measured time of garlic emergence on the field experiment. More research is needed to develop an advanced model considering other factors, such as soil moisture.

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Classification of Marl Soils

Cited by 3 publications

References 1 publication

Experimental Study of the Mechanical Behavior of Frozen Soils - A Case Study of Tabriz Subway

Experimental Study of the Mechanical Behavior of Frozen Soils - A Case Study of Tabriz Subway

Continuous rice cropping has been sequestering carbon in soils in Java and South Korea for the past 30 years

A Simple Emergence Model of Southern Type Garlic Based on Temperature

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