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- Author:
- Juhwan Lee, et al. ; Richard E. Plant; Show all 2 Author
- Source:
- Soil research 2022 v.60 no.7 pp. 755
- ISSN:
- 1838-675X
- Subject:
- autocorrelation; no-tillage; observational studies; research; soil; soil carbon; statistical models
- Abstract:
- ... Context : Unreplicated trials are common in agriculture. However, statistical inferences differ from those of traditional experiments based on small, replicated plots. Aims : To present a method to assess management effects on soil carbon (C) storage from unreplicated, side-by-side field trials. Methods : Two estimates of means with spatially correlated errors are compared using a corrected t -sta ...
- DOI:
- 10.1071/SR21090_CO
- https://doi.org/10.1071/SR21090_CO
- Author:
- Juhwan Lee, et al. ; Richard E. Plant; Show all 2 Author
- Source:
- Soil research 2022 v.60 no.7 pp. 743-754
- ISSN:
- 1838-675X
- Subject:
- autocorrelation; no-tillage; observational studies; research; soil; soil carbon; statistical models
- Abstract:
- ... Context Unreplicated trials are common in agriculture. However, statistical inferences differ from those of traditional experiments based on small, replicated plots. Aims To present a method to assess management effects on soil carbon (C) storage from unreplicated, side-by-side field trials. Methods Two estimates of means with spatially correlated errors are compared using a corrected t -statistic ...
- DOI:
- 10.1071/SR21090
- https://doi.org/10.1071/SR21090
- Author:
- Juhwan Lee, et al. ; Philipp Baumann; Thorsten Behrens; Asim Biswas; Johan Six; Gordon McLachlan; Raphael A. Viscarra Rossel; Show all 7 Authors
- Source:
- European journal of soil science 2022 v.73 no.2 pp. e13220
- ISSN:
- 1351-0754
- Subject:
- air drying; artificial intelligence; available water capacity; field capacity; pedotransfer functions; soil water retention; spectroscopy; volumetric water content; water holding capacity
- Abstract:
- ... We need measurements of soil water retention (SWR) and available water capacity (AWC) to assess and model soil functions, but methods are time‐consuming and expensive. Our aim here was to investigate the modelling of AWC and SWR with visible–near‐infrared spectra (vis–NIR) and the machine‐learning method cubist. We used soils from 54 locations across Australian agricultural regions, from three dep ...
- DOI:
- 10.1111/ejss.13220
- https://doi.org/10.1111/ejss.13220
- Author:
- Juhwan Lee, et al. ; Ka Yeon Ryu; Taesuk Jun; Daeyeon Lee; BongSoo Kim; Du Yeol Ryu; Kyungkon Kim; Show all 7 Authors
- Source:
- ACS applied materials & interfaces 2022 v.14 no.20 pp. 23474-23486
- ISSN:
- 1944-8252
- Subject:
- chlorobenzene; crosslinking; crystal structure; glass transition temperature; polymers
- Abstract:
- ... To commercialize organic solar cells (OSCs), changes in the optimized morphology of the photoactive layer caused by external stimuli that cause degradation must be addressed. This work improves OSC stability by utilizing the cross-linking additive 1,8-dibromooctane (DBO) and a sequential deposition process (XSqD) to fabricate the photoactive layer. The cross-linking additive in the donor polymer ( ...
- DOI:
- 10.1021/acsami.2c03340
- https://doi.org/10.1021/acsami.2c03340
- Author:
- Juhwan Lee, et al. ; Raphael A. Viscarra Rossel; Show all 2 Author
- Source:
- Nutrient cycling in agroecosystems 2020 v.116 no.2 pp. 245-255
- ISSN:
- 1385-1314
- Subject:
- carbon sinks; cattle; farms; grazing; humus; pedotransfer functions; prediction; simulation models; soil; soil map; soil organic carbon; soil surveys; total organic carbon; uncertainty; Australia
- Abstract:
- ... Process-based models of soil organic carbon (C) define soil organic matter by conceptual C pools. In the ROTH C model these pools are represented by the particulate, humus and resistant organic C fractions (POC, HOC, and ROC). Here, we used three different sets of estimates of the C fractions to initialise ROTH C and assessed their effect on the model predictions of the 0–0.3 m C stocks in a 30-ye ...
- DOI:
- 10.1007/s10705-019-10041-0
- https://doi.org/10.1007/s10705-019-10041-0
- Author:
- Juhwan Lee, et al. ; Lu Xu; Raphael A. Viscarra Rossel; Zhichun Wang; Hongyuan Ma; Show all 5 Authors
- Source:
- Soil research 2020 v.58 no.8 pp. 737-747
- ISSN:
- 1838-675X
- Subject:
- cameras; coastal soils; least squares; precision agriculture; research; salt content; soil salinity; soil salinization; soil salts; sustainable development; weather
- Abstract:
- ... Soil salinisation is a global problem that hinders the sustainable development of ecosystems and agricultural production. Remote and proximal sensing technologies have been used to effectively evaluate soil salinity over large scales, but research on digital camera images is still lacking. In this study, we propose to relate the pixel brightness of soil surface digital images to the soil salinity ...
- DOI:
- 10.1071/SR20009
- https://doi.org/10.1071/SR20009
- Author:
- Juhwan Lee, et al. ; Magdalena Necpálová; Johan Six; Show all 3 Authors
- Source:
- Agricultural systems 2020 v.181 pp. 102822
- ISSN:
- 0308-521X
- Subject:
- climate; composts; cover crops; cropland; ecological models; greenhouse gas emissions; greenhouse gases; land use; mineral fertilizers; nitrous oxide; organic production; pollution control; reduced tillage; risk; soil; soil organic carbon; winter; Switzerland
- Abstract:
- ... Little is known about the potential of adopting organic farming at regional scales for mitigating agricultural greenhouse gas (GHG) emissions. We simulated the effect of organic matter addition (manure and compost) on all cropland soils in Switzerland, with reduced tillage and winter cover cropping in combination. The DayCent model was run for the period 1991–2013 by accounting for factors such as ...
- DOI:
- 10.1016/j.agsy.2020.102822
- https://doi.org/10.1016/j.agsy.2020.102822
- Author:
- Juhwan Lee, et al. ; Magdalena Necpálová; Francesca Calitri; Johan Six; Show all 4 Authors
- Source:
- Nutrient cycling in agroecosystems 2020 v.118 no.1 pp. 9-22
- ISSN:
- 1385-1314
- Subject:
- agroecosystems; corn; crop production; ecological models; environmental impact; nitrogen; nitrogen fertilizers; organic fertilizers; organic matter; reduced tillage; soil; soil nutrient balance; total nitrogen; wheat; yields
- Abstract:
- ... Nitrogen (N) management in cropping systems needs adjustments because constraints to crop production are mostly related to high inputs and low recovery of N fertilizers. We used the DAYCENT model to predict regional N inputs, outputs, and balances of Swiss soils under (1) a range of N fertilizer input levels (0–300% of recommended crop-specific rates) and (2) organic fertilization, reduced tillage ...
- DOI:
- 10.1007/s10705-020-10078-6
- https://doi.org/10.1007/s10705-020-10078-6
- Author:
- Juhwan Lee, et al. ; Sang‐Kwon Lee; Kyoung‐Oh Cho; Mia Madel Alfajaro; Dohyeon Yu; Jihye Choi; Show all 6 Authors
- Source:
- Veterinary radiology & ultrasound 2019 v.60 no.5 pp. E48
- ISSN:
- 1058-8183
- Subject:
- Dachshund; bronchi; computed tomography; dogs; females; histology; pneumonia; pulmonary emphysema; radiography; spaying
- Abstract:
- ... A 10‐year‐old female spayed Dachshund was referred with progressive coughing for 1 month. The dog was tentatively diagnosed with right middle lung torsion based on pleural effusion, vesicular emphysema, abruptly ending bronchus in consolidated right middle lung, and no contrast enhancement of the affected lobe on radiography and computed tomography (CT). There was no evidence of torsion upon thora ...
- DOI:
- 10.1111/vru.12565
- https://doi.org/10.1111/vru.12565
- Author:
- Juhwan Lee, et al. ; Thorsten Behrens; Robert A. MacMillan; Raphael A. Viscarra Rossel; Karsten Schmidt; Show all 5 Authors
- Source:
- Geoderma 2019 v.354 pp. 113854
- ISSN:
- 0016-7061
- Subject:
- catenas; data collection; digital elevation models; environmental factors; landscapes; soil texture; topographic slope
- Abstract:
- ... In pedology, spatial context is relevant to soil-landscape systems on at least three different scales: i) the scale of quasi-local processes, which are independent of influence from the direct or wider neighborhood, ii) the scale of short-range processes for example on the local hillslope or catena, and iii) the scale of long-range processes, or teleconnected systems. We can represent the effects ...
- DOI:
- 10.1016/j.geoderma.2019.07.012
- https://doi.org/10.1016/j.geoderma.2019.07.012
- Author:
- Juhwan Lee, et al. ; Yuanyuan Yang; Raphael A. Viscarra Rossel; Shuo Li; Andrew Bissett; Zhou Shi; Thorsten Behrens; Leon Court; Show all 8 Authors
- Source:
- Soil biology & biochemistry 2019 v.129 pp. 29-38
- ISSN:
- 0038-0717
- Subject:
- Acidobacteria; Actinobacteria; absorbance; artificial intelligence; ecosystems; environmental factors; evapotranspiration; models; prediction; soil bacteria; soil minerals; soil nutrients; soil properties; soil water; topography; variance; wavelengths
- Abstract:
- ... Soil bacteria play a critical role in the functioning of ecosystems but are challenging to investigate. We developed state-factor models with machine learning to understand better and to predict the abundance of 10 dominant phyla and bacterial diversities in Australian soils, the latter expressed by the Chao and Shannon indices. In the models, we used proxies for the edaphic, climatic, biotic and ...
- DOI:
- 10.1016/j.soilbio.2018.11.005
- https://doi.org/10.1016/j.soilbio.2018.11.005
- Author:
- Juhwan Lee, et al. ; Cloé Garnache; Pierre R. Mérel; Johan Six; Show all 4 Authors
- Source:
- Journal of Environmental Economics and Management 2017 v.82 no. pp. 39-73
- ISSN:
- 0095-0696
- Subject:
- agri-environmental policy; air pollution control; cost benefit analysis; crop production; emissions factor; greenhouse gas emissions; land use; California
- Abstract:
- ... This paper investigates the social costs of second-best agricultural greenhouse gas (GHG) mitigation policies. Adjustments along the land use and input intensity margins are represented within a regionalized optimization model of California crop production calibrated to economic and agronomic information. Second-best policies relying on spatially aggregated GHG emission factors lead to small abate ...
- Handle:
- 10113/7325837
- DOI:
- 10.1016/j.jeem.2016.10.004
- CHORUS:
- 10.1016/j.jeem.2016.10.004
- https://doi.org/10.1016/j.jeem.2016.10.004
- Author:
- Juhwan Lee, et al. ; Tong June Kim; Yei Hwan Jung; Huilong Zhang; Kwangeun Kim; Zhenqiang Ma; Show all 6 Authors
- Source:
- ACS applied materials & interfaces 2018 v.10 no.9 pp. 8117-8123
- ISSN:
- 1944-8252
- Subject:
- acetone; geometry; lamps; materials science; methodology; transistors; ultrasonics
- Abstract:
- ... Photolithography based on optical mask is widely used in academic research laboratories due to its low cost, simple mechanism, and ability to pattern in micron-sized features on a wafer-scale area. Because the resolution is bound by diffraction limits of the light source, nanoscale patterning using photolithography requires short-wavelength light source combined with sophisticated optical elements ...
- DOI:
- 10.1021/acsami.7b17628
- https://doi.org/10.1021/acsami.7b17628
- Author:
- Juhwan Lee, et al. ; Pierre Mérel; Fujin Yi; Johan Six; Show all 4 Authors
- Source:
- American journal of agricultural economics 2014 v.96 no.1 pp. 67-91
- ISSN:
- 0002-9092
- Subject:
- acreage; agricultural economics; bioeconomic models; crop yield; environmental policy; field crops; irrigation; leaching; nitrates; nitrogen; nonpoint source pollution; pollution control; production functions; supply elasticities; taxes; California
- Abstract:
- ... We develop a programming model of crop production to predict the effects of environmental policies on agriculture and the environment. The model is calibrated against acreages, yields, and exogenous supply elasticities following positive mathematical programming. In addition, crop production functions are calibrated to yield elasticities with respect to nitrogen and irrigation obtained from a biog ...
- DOI:
- 10.1093/ajae/aat053
- https://doi.org/10.1093/ajae/aat053
- Author:
- Juhwan Lee, et al. ; Jian Cao; Johan Six; Yun Yan; Fusuo Zhang; Mingsheng Fan; Show all 6 Authors
- Source:
- European journal of soil biology 2015 v.68 pp. 94-100
- ISSN:
- 1164-5563
- Subject:
- Triticum aestivum; Zea mays; carbon; corn; crop production; cropland; cropping systems; denitrification; enzyme activity; farmers; grain crops; greenhouse gas emissions; greenhouses; irrigation; microbial activity; microbial communities; nitrates; nitrogen; nitrous oxide; production technology; soil depth; soil profiles; tillage; vegetable crops; vegetable growing; vegetables; wheat; China
- Abstract:
- ... In China, considerable cropland previously under grain production has been rapidly converted to greenhouse vegetable production by farmers since 1980s. Vegetable crops generally require higher nitrogen (N) inputs from manure amendments and more frequent tillage and irrigation operations compared to grain crops. Here, we compared potential denitrification-derived N2O emissions across the soil profi ...
- DOI:
- 10.1016/j.ejsobi.2015.03.009
- https://doi.org/10.1016/j.ejsobi.2015.03.009
- Author:
- Juhwan Lee, et al. ; Gabriel Pedroso; Chris van Kessel; Johan Six; Show all 4 Authors
- Source:
- Agriculture, ecosystems & environment 2015 v.212 pp. 64-74
- ISSN:
- 0167-8809
- Subject:
- Mediterranean climate; Panicum virgatum; carbon dioxide; cultivars; energy crops; greenhouse gas emissions; greenhouse gases; irrigation rates; models; nitrogen fertilizers; nitrous oxide; renewable energy sources; soil; soil organic carbon; water stress; Central Valley of California
- Abstract:
- ... The potential of switchgrass (Panicum virgatum L.) to offset large-scale greenhouse gas (GHG) emissions depends on optimizing external inputs when the crop is primarily managed as a sustainable source for renewable energy production. Due to the heterogeneity of climate and soil conditions and the complexity of agriculture, an evaluation of the effect of adopting switchgrass as a new biofuel crop i ...
- DOI:
- 10.1016/j.agee.2015.06.015
- https://doi.org/10.1016/j.agee.2015.06.015
- Author:
- Juhwan Lee, et al. ; Magdalena Necpalova; Colin Skinner; Lucie Büchi; Raphael Wittwer; Andreas Gattinger; Marcel van der Heijden; Paul Mäder; Raphael Charles; Alfred Berner; Jochen Mayer; Johan Six; Show all 12 Authors
- Source:
- Agriculture, ecosystems & environment 2018 v.265 pp. 84-102
- ISSN:
- 0167-8809
- Subject:
- Vicia; animal manures; carbon sequestration; climate change; composting; crop yield; cropping systems; fertilizer application; greenhouse gas emissions; greenhouse gases; long term effects; methane; mineral fertilizers; models; nitrous oxide; no-tillage; organic fertilizers; organic production; oxidation; pollution control; reduced tillage; slurries; soil; Switzerland
- Abstract:
- ... There is an urgent need to identify and evaluate management practices for their biophysical potential to maintain productivity under climate change while mitigating greenhouse gas (GHG) emissions from individual cropping systems under specific pedo-climatic conditions. Here, we examined, through DayCent modeling, the long-term impact of soil management practices and their interactions on soil GHG ...
- DOI:
- 10.1016/j.agee.2018.05.013
- https://doi.org/10.1016/j.agee.2018.05.013
- Author:
- Juhwan Lee, et al. ; Jihye Bong; Zachi I. Attia; Vaibhav R. Vaidya; Yei Hwan Jung; Deepak Padmanabhan; Hyungsoo Kim; Dorothy J. Ladewig; Peter A. Noseworthy; Samuel J. Asirvatham; Dong-Wook Park; Paul A. Friedman; Zhenqiang Ma; Show all 13 Authors
- Source:
- Carbon 2019 v.152 pp. 946-953
- ISSN:
- 0008-6223
- Subject:
- X-radiation; animal models; dogs; electrocardiography; electrodes; graphene; image analysis; monitoring; patients; radiography
- Abstract:
- ... Conventional implantable electrocardiogram monitors are impenetrable to electromagnetic radiation, posing challenges in imaging (i.e. X-rays). In this study, we demonstrate a radiolucent implantable electrocardiogram (ECG) device using graphene sheets and Parylene substrate which allows bypassing of electromagnetic radiation through the implanted device. Evaluated on a canine model, the graphene e ...
- DOI:
- 10.1016/j.carbon.2019.06.069
- https://doi.org/10.1016/j.carbon.2019.06.069
- Author:
- Juhwan Lee, et al. ; Steven De Gryze; Johan Six; Show all 3 Authors
- Source:
- Climatic change 2011 v.109 no.Supplement 1 pp. 335-353
- ISSN:
- 0165-0009
- Subject:
- cotton; tomatoes; carbon dioxide; cultivars; Helianthus annuus; rice; greenhouse gas emissions; field crops; corn; hay; alfalfa; climate change; grain yield; hydrology; climate models; winter wheat; crop rotation; climate; Central Valley of California
- Abstract:
- ... Climate change under various emission scenarios is highly uncertain but is expected to affect agricultural crop production in the 21st century. However, we know very little about future changes in specific cropping systems under climate change in California’s Central Valley. Biogeochemical models are a useful tool to predict yields as it integrates crop growth, nutrient dynamics, hydrology, manage ...
- DOI:
- 10.1007/s10584-011-0305-4
- https://doi.org/10.1007/s10584-011-0305-4
- Author:
- Juhwan Lee, et al. ; Joo-Hee Lee; Hyun Nam; Soyoun Um; Gene Lee; Byoung Moo Seo; Show all 6 Authors
- Source:
- In vitro cellular & developmental biology 2014 v.50 no.5 pp. 399-405
- ISSN:
- 1071-2690
- Subject:
- humans; immunocytochemistry; macrophage colony-stimulating factor; reverse transcriptase polymerase chain reaction; secretion; tooth root; transforming growth factor beta 1; vimentin; zinc finger motif
- Abstract:
- ... Hertwig’s epithelial root sheath/epithelial rests of Malassez (HERS/ERM) have been suggested to play an important role in tooth root formation, particularly in periodontal development. Epithelial mesenchymal transition (EMT) has been suggested to contribute to root development in tooth. However, the mechanism of interaction between HERS/ERM cells and dental mesenchymal cells has not been fully und ...
- DOI:
- 10.1007/s11626-013-9712-3
- PubMed:
- 24258001
- https://doi.org/10.1007/s11626-013-9712-3