Article
Geosciences, Multidisciplinary
Ting Li, Junjie Liang, Xiaoqin Chen, Huoyan Wang, Shirong Zhang, Yulin Pu, Xiaoxun Xu, Hao Li, Jingwen Xu, Xiaobo Wu, Xiaojing Liu
Summary: The study evaluated the complex interactions and relative contributions of environmental variables to soil potassium variations in China agricultural soil using structural equation model (SEM). The results showed that climate was the most important factor controlling soil K variations, followed by topographical conditions, clay mineralogical composition, and key soil properties.
Article
Soil Science
Vincent Geoffroy, Baptiste Dazas, Eric Ferrage, Felisa Berenguer, Celine Boissard, Laurent J. Michot, Folkert van Oort, Emmanuel Tertre, Fabien Hubert
Summary: This article introduces an innovative method based on synchrotron 2D micro X-ray diffraction (2D-mu XRD) to study soil crusts. With this method, it is possible to describe the micromorphological features of soil crusts in great detail and obtain quantitative information about the structural characteristics of clay minerals in soil crusts.
Article
Agronomy
Guang-Zhong Han, Xiao-Ming Cao, Bang-Shuai Han, Fan Yang, Lai-Ming Huang, Yun-Jin Wu
Summary: The effect of long-term rice cultivation on the K-supplying capacity and adsorption characteristics of paddy soils was investigated in Southern China. Results showed that paddy soils had higher water dissolvable K and non-exchangeable K contents, but lower exchangeable K contents compared to original soils. This was caused by the loss of sorbents and the occupation of sorption sites by soil organic matter. It is necessary to apply balanced K fertilizers to maintain soil fertility and crop yield.
ARCHIVES OF AGRONOMY AND SOIL SCIENCE
(2023)
Article
Engineering, Ocean
Moulay Youssef Monsif, Jinyuan Liu, Naresh Gurpersaud
Summary: An experimental study investigated the impact of salinity on the microstructure, phase composition, and shear strength of cement-treated Champlain Sea clay. The presence of sodium chloride salt was found to have a negative effect on the strength development of the clay specimens. An optimum salinity level of 1.33 g/L was identified to achieve the highest shear strength, as confirmed by SEM and X-ray diffraction analysis.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2021)
Article
Agronomy
Eduardo Leonel Bottega, Jose Lucas Safanelli, Mojtaba Zeraatpisheh, Telmo Jorge Carneiro Amado, Daniel Marcal de Queiroz, Zanandra Boff de Oliveira
Summary: This study investigates the use of precision agriculture techniques and soil apparent electrical conductivity to delineate management zones based on key soil attributes. The results show that these management zones can effectively differentiate average values of soil texture and crop yield, providing valuable insights for understanding soil variability and making precise input adjustments.
Article
Engineering, Geological
Claudia Regina Bernardi Baldin, Maiky Yamato Kawanami, Weiner Gustavo Silva Costa, Vitor Reinaldo Bordignon, Cristhyano Cavali da Luz, Ronaldo Luis dos Santos Izzo
Summary: This study assessed the effect of adding rice husk fiber on the mechanical behavior of clayey soil. The results showed that adding 1% and 1.5% fiber significantly increased the compressive strength of the soil, while in the undrained tests, the fiber addition decreased the cohesion and increased the friction angle of the soil.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
News Item
Geosciences, Multidisciplinary
Ji Chen, Yiqi Luo, Robert L. Sinsabaugh
Summary: A field study lasting 4.5 years shows that warming the soil leads to the loss of structurally complex organic carbon at the same rate as bulk organic carbon in subsoil.
Article
Multidisciplinary Sciences
V. Janani, P. T. Ravichandran
Summary: This article focuses on the application of chemical stabilizers in improving the properties of expansive soil. The addition of calcined clay is used to improve the compaction and swelling characteristics of the soil, and the optimal improvement effect is achieved with 8% of calcined clay. This method can reduce soil deformation and increase its shear strength, while also providing some environmental benefits.
Article
Chemistry, Physical
Warda Ashraf, Ishrat Baki Borno, Rakibul I. Khan, Salman Siddique, Muhammad Intesarul Haque, Adhora Tahsin
Summary: By mimicking the cementation of ancient Roman concrete, durable and sustainable seawater concrete can be produced. Seawater acts as an activator in the alkaline environment, accelerating the reaction between calcined clay and portlandite, and forming different reaction products, with phillipsite exhibiting binding and sequestration of chlorides and sulfates.
APPLIED CLAY SCIENCE
(2022)
Article
Construction & Building Technology
Waqas Hassan, Badee Alshameri, Syed Muhammad Jamil, Zain Maqsood, Abbas Haider, Arfan Shahzad
Summary: The use of potassium-rich wood ash (KRWA) as an environmentally friendly alternative to calcium-based materials in treating dispersive clay has shown promising results. This study found that 10% KRWA content is the optimal amount, reducing dispersion and sodium content significantly and improving the workability and load-bearing capacity of the treated clay. The physio-chemical analysis revealed the processes of ion exchange, agglomeration, and flocculation, followed by the formation of cementitious gels. Cost-based analysis also showed that KRWA is a more economical option for highway/road applications.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Geochemistry & Geophysics
Xin-Yuan Zheng, Brian L. Beard, Mason Neuman, Maria F. Fahnestock, Julia G. Bryce, Clark M. Johnson
Summary: Recent discoveries have shown significant variations in stable K isotope ratios among different terrestrial samples, suggesting that K isotopes can be used as a new tracer for the global K cycle. The observation of seawater 841K being 0.6%o higher than the bulk silicate Earth remains unexplained. The role of hydrothermal systems in the ocean, which are both a major K source and sink, is critical to understanding this puzzle. The study found that fluid 841K values in mid-ocean ridge hydrothermal fluids are influenced by water-rock interactions and show small but significant isotope fractionation. These results suggest that MOR hydrothermal systems are not responsible for the heavy 841K value of seawater. The study also highlights the importance of marine sedimentary sinks, such as authigenic clay formation, in the global K cycle. Additionally, applying the findings to published data from ophiolites suggests the possibility of significantly lower seawater 841K values during the Ordovician.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Engineering, Multidisciplinary
Adil A. M. Elhassan, Mohammed Mnzool, Hichem Smaoui, Abir Jendoubi, Bushra M. E. Elnaim, Maged Faihan Alotaibi
Summary: The impact of clay mineralogy on engineering properties, such as strength and stiffness, of road materials is investigated in this study. It is found that kaolinite is more effective than montmorillonite in reducing clay plasticity, and samples with high kaolinite content exhibit higher strength indicators. Additionally, kaolinitic soil samples have a larger constrained modulus than other samples.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Agronomy
Joao Flavio Floriano Borges Gomides, Michele dos Santos Leite, Fabio Steiner, Alan Mario Zuffo, Jorge Gonzalez Aguilera, Rafael Felippe Ratke, Herry Lloclla Gonzales, Wilmer Enrique Vidaurre Garcia, Luis Miguel Serquen Lopez, Carlos Gerano Morales Aranibar, Nataniel Linares Gutierrez, Luis Fortunato Morales-Aranibar
Summary: Soybean genotypes with efficient potassium (K) uptake and utilization in low K soils were identified in a study in Brazil. Some genotypes were found to be efficient in K use and suitable for cultivation in low K soils, while others were responsive to K fertilization and recommended for cultivation in areas with high K fertilizer application. One genotype showed both K-use efficiency and response to K fertilization, making it suitable for cultivation in K-deficient and optimal soils.
Article
Environmental Sciences
James Tsz Fung Wong, Ka Lai Chow, Xun Wen Chen, Charles Wang Wai Ng, Ming Hung Wong
Summary: The study found that compacted biochar-amended clay has a higher water retention capacity compared to clay alone, especially at low soil suction. This composite material can serve as a hydraulic barrier to minimize desiccation-induced cracks and has potential applications in arid regions.
Article
Computer Science, Interdisciplinary Applications
Dulguun Narmandakh, Christoph Butscher, Faramarz Doulati Ardejani, Huichen Yang, Thomas Nagel, Reza Taherdangkoo
Summary: This article presents the use of neural network models to predict the swelling potential of clay soils, including both natural and artificial soils. The models were trained using the Levenberg-Marquardt algorithm and validated with experimental data, showing that the feed-forward neural network trained with this algorithm is the most accurate.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Soil Science
John McL Bennett, Alla Marchuk, Serhiy Marchuk
Article
Agronomy
A. Dang, J. McL. Bennett, A. Marchuk, S. Marchuk, A. J. W. Biggs, S. R. Raine
AGRICULTURAL WATER MANAGEMENT
(2018)
Article
Soil Science
J. McL. Bennett, S. D. Roberton, S. Marchuk, N. P. Woodhouse, D. L. Antille, T. A. Jensen, T. Keller
SOIL & TILLAGE RESEARCH
(2019)
Article
Soil Science
J. McL Bennett, A. Marchuk, S. Marchuk, S. R. Raine
Article
Agricultural Engineering
Leandro Janke, Bernadette Kathleen McCabe, Peter Harris, Andrew Hill, Seonmi Lee, Soeren Weinrich, Serhiy Marchuk, Craig Baillie
BIORESOURCE TECHNOLOGY
(2019)
Article
Environmental Sciences
Torben Grell, Serhiy Marchuk, Ian Williams, Bernadette K. McCabe, Stephan Tait
Summary: Mechanical solid-liquid separation is a promising technology for recovering and recycling carbon, nutrients, and water from dilute livestock manure. It can improve separation efficiency and increase the concentration of organic matter and nutrients in the solid fraction, while reducing methane emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Environmental Sciences
Serhiy Marchuk, Stephan Tait, Payel Sinha, Peter Harris, Diogenes L. Antille, Bernadette K. McCabe
Summary: Soil application of biosolids as an organic fertiliser is a cost-effective way to maintain soil fertility, but concerns over microplastics and organic contaminants have raised scrutiny. This study reviews the contaminants in biosolids, nutrient contents, extractive technologies, and the use of recovered nutrients and biochar for organomineral fertilisers. Challenges and recommendations for future research are provided for safe reuse of biosolids-derived fertilisers.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)