Article
Construction & Building Technology
Yang Song, Qier Wu, Franck Agostini, Frederic Skoczylas, Xavier Bourbon
Summary: The study investigated the concrete shrinkage and creep under variable hydric conditions through a long-term experiment, and found that the final mass and strain of concrete were not deeply modified by introducing a rewetting phase.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Environmental Sciences
Huan-Qin Li, Hu Li, Xin-Yuan Zhou, Ying-Jia Shen, Jian-Qiang Su
Summary: The study investigates the impact of soil moisture and redox potentials on soil microbial community structure and active microbes, revealing that the dynamics of active microbes are influenced by redox potentials. Abundant and rare taxa show differences in response to wetting-drying cycles.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Minxue Guo, Hong Tong, Dongqing Cai, Wei Zhang, Peng Yuan, Yihao Shen, Cheng Peng
Summary: Wetting-drying cycles were found to enhance the bioavailability of Cu in paddy soil treated with CuO nanoparticles, preventing the aging process of Cu and transforming oxidizable Cu to different forms. Additionally, wetting-drying cycles significantly affected the transformation of dissolved organic matter and sulfate, as well as the changes in iron content. Therefore, natural precipitation and artificial irrigation play a crucial role in determining the environmental risks of metal-based nanoparticles.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Soil Science
Meghna Sharma, Neelima Satyam
Summary: MICP is a sustainable and effective biocementation technique that utilizes enzymes produced by microbes. Research indicates that using bacterial mixtures for bioaugmentation can enhance the effectiveness, while the durability aspects such as wetting-drying resistance and ageing require further investigation.
Article
Agronomy
Xiaoyuan Jing, Liuchang Su, Yisen Wang, Miao Yu, Xuguang Xing
Summary: Soil physical properties, including saturated hydraulic conductivity, water holding capacity, bulk density, and water content, are significantly affected by the addition of microplastics (MPs) under wetting-drying cycle conditions. The effects of different MP particle sizes and concentrations on soil physical properties were observed, but were overshadowed by the effects of wetting-drying cycles. The changes in soil physical properties are attributed to the interaction between MPs, soil particles, and frequent wetting-drying cycles.
Article
Engineering, Environmental
Xin Huang, Jianyong Pang
Summary: This study investigated the changes in physical parameters and mechanical strength of sandstone under acidic drying-wetting cycles. Results showed that the acidic solution caused more severe damage to the specimens and led to early destruction, while the slowdown in porosity growth contributed to the gradual decrease in physical parameters.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Engineering, Geological
Jumanah Hajjat, Marcelo Sanchez
Summary: This study introduces a new apparatus to investigate the cracking behavior and tensile-compressive forces in soils during drying-wetting cycles. The device is equipped with a balance, digital camera, image analysis software, and digital image correlation technique. Results show that tensile forces were higher during the first drying compared to subsequent dryings, while compressive forces during wetting were smaller than the tensile forces during drying. The crack networks became denser as cycles progressed, with new cracks growing in the soil after each stage.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2021)
Article
Engineering, Civil
Christopher Walker, Ana Heitor, Barry G. Clarke
Summary: Small strain shear modulus (Gmax) is an important parameter for assessing the performance of compacted soils under transportation infrastructure. Climate patterns and moisture fluctuations affect the small strain properties of compacted soils. This study evaluated the small strain shear behavior of kaolin clay in drying and wetting cycles.
TRANSPORTATION GEOTECHNICS
(2023)
Article
Engineering, Civil
Arvind Kumar Shivanshi, Arvind Kumar Jha, Mohammad Parwez Akhtar
Summary: The impact of wetting-drying cycles on the behavior of lime treated soil exposed to sulphate contamination is investigated. The results show that the strength of lime treated soil is significantly influenced by sulphate concentration, types of sulphate compound, curing periods, and number of wetting-drying cycles. Adverse effects on strength and durability are pronounced at sulphate concentrations higher than 16000 ppm. Experimental results are further elucidated with physicochemical behavior and microanalyses.
TRANSPORTATION GEOTECHNICS
(2023)
Article
Engineering, Geological
Zi Ying, Yu-Jun Cui, Nadia Benahmed, Myriam Duc
Summary: Lime treatment can significantly increase the small strain shear modulus (G(max)) of soil, providing good resistance to wetting-drying cycles. However, the effect can be altered depending on factors such as wetting fluid and soil state. While untreated soil softens and damages during wetting-drying cycles, lime-treated soil maintains its resistance and reversible pore size distributions.
ENGINEERING GEOLOGY
(2021)
Article
Construction & Building Technology
Xiaolu Guo, Guiyan Xiong
Summary: The study on fly ash-steel slag based geopolymer mortar under double-factor coupling environment showed that the compressive and flexural strength gradually increased and stabilized, indicating excellent corrosion resistance. The fiber-reinforced structure played a key role in enhancing the mechanical performance of the mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Environmental
Gui-tao Zhao, Wei-lie Zou, Zhong Han, Dong-xing Wang, Xie-qun Wang
Summary: The research shows that DW and FT cycles have a significant impact on the macrostructure of the clay, affecting water retention capacity and volumetric shrinkage, but have little effect on compression and plastic limits.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Civil
Geetanjali Das, Andry Razakamanantsoa, Gontran Herrier, Dimitri Deneele
Summary: The type of wetting fluid plays an important role in the evolution of lime-treated soil, affecting its physicochemical changes and Unconfined Compressive Strength (UCS) evolution.
TRANSPORTATION GEOTECHNICS
(2022)
Article
Environmental Sciences
Ziwan Wang, Kamel Mohamed Eltohamy, Boyi Liu, Junwei Jin, Xinqiang Liang
Summary: The impact of drying-rewetting cycles on the behavior of differently-sized colloidal phosphorus in agricultural soils is significant. The fine-sized colloidal phosphorus dominates the overall distribution of colloidal phosphorus. Drying-rewetting cycles do not change the distribution of phosphorus size fractions, but they affect the concentration and composition of phosphorus.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Engineering, Geological
Chong Wang, Wansheng Pei, Mingyi Zhang, Yuanming Lai, Jinpeng Dai
Summary: The repeated wetting-drying (WD) cycles result in the widening of pores in sandstone, forming low-density areas and increasing density dispersion, weakening physical and mechanical properties. The P-wave velocity decreases faster than the S-wave velocity, especially in the first 5 cycles. Exponential equations are established to describe the deterioration of mechanical characteristics with the number of WD cycles.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Soil Science
Lin Liu, Yili Lu, Robert Horton, Tusheng Ren
Summary: A new approach is presented in this study to estimate the parameters of the soil water retention curve (SWRC). The new method accurately estimates SWRCs by using measured thermal conductivity-water content curves, soil texture, bulk density, and field capacity water content.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Zhongshan Dai, Yong Zhang, Yujie Wei, Chongfa Cai
Summary: This study investigates the effects of erosion degradation and long-term manure fertilization on soil properties and crop yield in Northeast China. Results show that erosion degradation and manure fertilization have lasting impacts on soil physical structure throughout the soil profile, while their effects on soil nutrient properties are focused in shallow layers. Manure fertilization significantly improves soil functional index (ISI) and maize yield for degraded soils. Erosion degradation has a greater influence on ISI and maize yield than manure fertilization.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Xintong Xu, Ruiyu Bi, Mengxin Song, Yubing Dong, Ying Jiao, Bingxue Wang, Zhengqin Xiong
Summary: The substitution of organic fertilizers for inorganic fertilizers has a significant impact on soil organic carbon (SOC) and can help combat soil degradation and climate change in intensive vegetable production.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Moritz Koza, Roger Funk, Julia Poehlitz, Christopher Conrad, Olga Shibistova, Tobias Meinel, Kanat Akshalov, Gerd Schmidt
Summary: Semi-arid regions in Central Asia are experiencing wind erosion due to steppe conversion and unsustainable farming practices. A study conducted in Kazakhstan used a mobile wind tunnel to assess soil erodibility under real conditions. The results showed significant differences in soil erosion based on initial conditions and mechanical stress, emphasizing the importance of proper soil management to prevent severe events.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Tong Li, Guorui Li, Zhiqiang Lu, Deqiang Zhao, Yuze Li, Ziting Wang, Xiaoxia Wen, Yuncheng Liao
Summary: Conservation agriculture with three management principles is effective in mitigating soil erosion and nutrient loss. This study found that no tillage significantly increased soil extracellular enzyme activities, while legume incorporation only had a significant effect on phosphorus-acquiring enzymes. Crop diversity positively influenced the no tillage-induced increase in enzyme activities.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Zahra Khasi, Mohammad Sadegh Askari, Setareh Amanifar, Kamran Moravej
Summary: This research aims to evaluate the applicability of visual soil evaluation methods for agricultural systems in semi-arid regions and assess the relationship between soil physical quality and crop yield. The results indicate that visual evaluation methods can effectively assess soil conditions, and optimal soil structural quality is crucial for sustainable crop production.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Amin Jannatul Ferdous, Xiaolin Wang, Katie Lewis, John Zak
Summary: Conservative agricultural management strategies can enhance crop productivity by altering soil microbiome, and incorporating legumes into cover crops in semi-arid regions can improve the dynamics of rhizobial communities. There is a strong underlying relationship between soil management and bacterial diversity in the soil.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Haiman Wang, Wankui Ni, Haisong Liu, Kangze Yuan
Summary: This study investigates the structural strength of the Loess-Paleosol Sequence (LPS) and finds that the strength tends to increase with burial depth, with the loess layer weaker than the paleosol layer. The microstructure of the LPS also undergoes significant transformations with increased burial depth, transitioning from an overhead structure to a matrix structure. These findings highlight the importance of climate conditions on the structural strength of the LPS.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Ranabir Chakraborty, V. K. Sharma, Debarup Das, D. R. Biswas, P. Mahapatra, D. K. Shahi, M. Barman, K. A. Chobhe, D. Chakraborty
Summary: This study aimed to evaluate the impact of long-term nutrient management practices on P fractions and P adsorption-desorption behaviour of an acid soil with a soybean-wheat cropping system. The findings revealed that amorphous Fe and Al, which play a significant role in P fixation, increased due to cultivation. The NPK+Lime treatment offered the most balanced approach, improving both crop yield and P uptake while effectively managing P dynamics in the soil. On the contrary, long-term application of NPK+FYM in an acid soil may result in faster P saturation of adsorption sites and increase the chances of leaching and eutrophication. Tailored P fertilization strategies should be developed to better utilize the PFe and PAl fractions and supplementing applied P.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Yuan Li, Ying Li, Qingping Zhang, Gang Xu, Guopeng Liang, Dong-Gill Kim, Carmen Rosa Carmona, Mei Yang, Jianming Xue, Yangzhou Xiang, Bin Yao, Yuying Shen
Summary: Agricultural intensification has led to severe degradation of croplands in China. Converting degraded croplands to grasslands can increase soil organic carbon and nitrogen content, but may decrease soil pH and available phosphorus. The duration of conversion and mean annual precipitation are major factors influencing soil changes.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Xinliang Wu, Sixu Yao, Jinxing Zhou
Summary: The coupling effect of slaking and mechanical breakdown on aggregate stability was evaluated using a new method. This method can partition the unique and shared effects of these two breakdown mechanisms and showed better performance in predicting soil erosion compared to existing methods.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Xinni Ju, Lei Gao, Dongli She, Yuhua Jia, Zhe Pang, Yaji Wang
Summary: This study linked soil pore structures quantified by X-ray computed tomography (CT) scanning and infiltration processes traced using stable hydrogen and oxygen isotopes under different land uses in the red soil region of southern China. The results showed that soil pore characteristics mainly affected soil water transport, while other soil properties played more important roles in soil water retention. CT-based porosity and soil texture were considered crucial indicators in the evaluation of water exchange during infiltration processes.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Hongwei Xu, Qing Qu, Jiaping Yang, Zhen Wang, Minggang Wang, Rentao Liu, Sha Xue
Summary: This study systematically analyzed the effects of drought on terrestrial ecosystem C-N-P stoichiometry on a global scale. The results showed that drought significantly decreased the C:N ratio in soil, enzymes, shoots, and roots. Soil microbes were limited by N, whereas plants were restricted by P under drought stress. Drought intensity and duration were negatively correlated with shoot N:P and vector angle.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Sara L. Bauke, Sabine J. Seidel, Miriam Athmann, Anne E. Berns, Melanie Braun, Martina I. Gocke, Julien Guigue, Timo Kautz, Ingrid Koegel-Knabner, Juliette Ohan, Matthias Rillig, Michael Schloter, Oliver Schmittmann, Stefanie Schulz, David Uhlig, Andrea Schnepf, Wulf Amelung
Summary: Agricultural production in Central Europe is increasingly affected by extreme drought events. This study found that incorporating organic matter, especially biowaste compost, into the subsoil significantly increased root growth and subsequently improved crop nutrient uptake, biomass, and grain yield. The incorporation of green waste compost had less pronounced effects.
SOIL & TILLAGE RESEARCH
(2024)
Article
Soil Science
Xi Chen, Xuesong Wang
Summary: Based on the application of the integrated wind erosion modeling system, this study comprehensively simulated the loss and conservation of nutrients during aeolian dust emissions in the arid and semiarid areas of China. The results showed a decreasing trend in nutrient losses over the past two decades, with the ecosystems playing a crucial role in preventing these losses. The prevention rates of different land cover types were generally high, indicating the effectiveness of conservation measures.
SOIL & TILLAGE RESEARCH
(2024)