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1. New wings on the interaction between conventional subsoiler and paraplow tines with the soil: effects on the draft and the properties of soil

Author:
Askari, Mohammad; Shahgholi, Gholamhossein; Abbaspour-Gilandeh, Yousef
Source:
Archiv für Acker- und Pflanzenbau und Bodenkunde 2019 v.65 no.1 pp. 88-100
ISSN:
1476-3567
Subject:
clay loam soils; disturbed soils; soil aggregation,   etc   ; conservation tillage; subsoilers;     Show all 5 Subjects
Abstract:
... Equipping tines with the wings increases draft and soil loosening. Wing angles affect tine performance, soil aggregation and remained residue. In this research, conventional wing with no bent plus backward and forward bent wings with bend angles of 10 and 20° were attached to both a subsoiler and paraplow tine. The rake angle of all wings was 15°. The effects of tine and wing on draft, soil distur ...
DOI:
10.1080/03650340.2018.1486030

2. Natural language indexing for pedoinformatics

Author:
Furey, John; Davis, Austin; Seiter-Moser, Jennifer
Source:
Geoderma 2019 v.334 pp. 49-54
ISSN:
0016-7061
Subject:
U.S. Soil Taxonomy; World Reference Base for Soil Resources; soil formation,   etc   ; USDA; databases; soil profiles; soil properties; soil surveys;     Show all 8 Subjects
Abstract:
... The multiple schema for the classification of soils rely on differing criteria but the major soil science systems, including the United States Department of Agriculture (USDA) and the international harmonized World Reference Base for Soil Resources soil classification systems, are primarily based on inferred pedogenesis. Largely these classifications are compiled from individual observations of so ...
DOI:
10.1016/j.geoderma.2018.07.050

3. Biochar amendment improves crop production in problem soils: A review

Author:
Yu, Haowei; Zou, Weixin; Chen, Jianjun; Chen, Hao; Yu, Zebin; Huang, Jun; Tang, Haoru; Wei, Xiangying; Gao, Bin
Source:
Journal of environmental management 2019 v.232 pp. 8-21
ISSN:
0301-4797
Subject:
arable soils; soil amendments; soil formation,   etc   ; biochar; carbon; carbon sequestration; crop production; farming systems; plant growth; roots; soil microorganisms; soil pollution; soil productivity; soil quality; soil remediation;     Show all 15 Subjects
Abstract:
... Problem soils are referred to as those with poor physical, chemical, and biological properties that inhibit or prevent plant growth. These poor properties may be a result of soil formation processes but are largely due to inappropriate farming practices or anthropogenic pollution. The world has lost a third of its arable land due to erosion and pollution in the past 40 years. Thus, there is an urg ...
DOI:
10.1016/j.jenvman.2018.10.117

4. Resilience of Red Ferralitic soils in the karst regions of Mayabeque Province, Cuba

Author:
Febles González, José M.; Febles Díaz, J.M.; Sobrinho, Nelson Moura B. Amaral; Tolón‐Becerra, Alfredo; Lastra‐Bravo, Xavier; Botta, Guido F.
Source:
Land degradation & development 2019 v.30 no.1 pp. 109-116
ISSN:
1085-3278
Subject:
soil; soil degradation,   etc   ; ecosystems; karsts; limestone; Cuba;     Show all 6 Subjects
Abstract:
... There is an ongoing global debate on soil degradation, its magnitude and agro‐environmental impact, where long‐term experimentation provides quantitative criteria for its capacity for restauration with rational use and management. In this context, research in the last 30 years has confirmed that the resilience of Red Ferralitic soils in the karst regions of western Cuba is a multifactorial process ...
DOI:
10.1002/ldr.3192

5. Soil organic carbon and soil erosion – Understanding change at the large catchment scale

Author:
Hancock, G.R.; Kunkel, V.; Wells, T.; Martinez, Cristina
Source:
Geoderma 2019 v.343 pp. 60-71
ISSN:
0016-7061
Subject:
soil; soil erosion; soil movement,   etc   ; cesium; landscapes; radionuclides; rain; soil organic carbon; storms; watersheds;     Show all 10 Subjects
Abstract:
... Soil organic carbon (SOC) is a major soil component. However, there is still much to learn regarding its spatial and temporal distribution as well as how SOC moves through the landscape. Of particular interest is how SOC movement is related to soil erosion and deposition. Here we examine the spatial distribution of SOC over two large (562 and 606 km2) catchments in relation to soil erosion and dep ...
DOI:
10.1016/j.geoderma.2019.02.012

6. A theoretical investigation on characteristic frequencies of ground vibrations induced by elevated high speed train

Author:
Shi, Li; Sun, Hong-lei; Pan, Xiao-dong; Geng, Xue-yu; Cai, Yuan-qiang
Source:
Engineering geology 2019 v.252 pp. 14-26
ISSN:
0013-7952
Subject:
soil,   etc   ; cities; railroads; China;     Show all 4 Subjects
Abstract:
... High speed railway is an ever-expanding mega project in China, connecting more and more cities of economy importance. This paper presents a theoretical evaluation on vibrations of saturated ground induced by high speed train operating on an elevated bridge. The simply-supported bridge consisting of a slab railway track resting on multiple spans of box girder is treated using the periodic theory. W ...
DOI:
10.1016/j.enggeo.2019.02.014

7. Diffusivity and sorptivity determination at different soil water contents from horizontal infiltration

Author:
Villarreal, Rafael; Lozano, Luis A.; Melani, Esteban M.; Salazar, María Paz; Otero, María Florencia; Soracco, C. Germán
Source:
Geoderma 2019 v.338 pp. 88-96
ISSN:
0016-7061
Subject:
sandy loam soils; silt loam soils; soil water,   etc   ; diffusivity; hydraulic conductivity; soil water content; Pampas region;     Show all 7 Subjects
Abstract:
... Determination of soil hydraulic properties under non-saturated conditions is crucial in order to describe soil water dynamics in the field. The objectives of this work were: i- to determine soil water diffusivity (D) as a function of soil moisture with a simple lab set-up, based on Whisler et al. (1968) methodology, from soil moisture profiles obtained using capacitive sensors in three contrasting ...
DOI:
10.1016/j.geoderma.2018.11.045

8. Characteristics and simplified model of film slit irrigation

Author:
Li, Yibo; Liu, Ye; Fan, Haiyan; Xing, Xuguang; Wu, Lei; Ma, Xiaoyi
Source:
Archiv für Acker- und Pflanzenbau und Bodenkunde 2019 v.65 no.1 pp. 16-30
ISSN:
1476-3567
Subject:
soil structure; soil texture; soil types,   etc   ; irrigation; irrigation water; models; soil water;     Show all 7 Subjects
Abstract:
... Research on the factors affecting the characteristics of film slit irrigation has not received sufficient attention, although this is a wide-adopted irrigation technology. Infiltration modelling based on fewer factors deserves priority in the field studies. A laboratory theoretical study was conducted to investigate the simulated effects of SWMS-2D (simulating water movement through soil in two-di ...
DOI:
10.1080/03650340.2018.1477254

9. A new digital electromechanical system for measurement of soil bulk density

Author:
Al-Shammary, Ahmed Abed Gatea; Kouzani, Abbas; Saeed, Thamir R.; Rodrigo-Comino, Jesús
Source:
Computers and electronics in agriculture 2019 v.156 pp. 227-242
ISSN:
0168-1699
Subject:
soil density; soil depth; soil quality,   etc   ; automation; bulk density; labor; soil texture;     Show all 7 Subjects
Abstract:
... This research describes the automation of the widely used volumetric cylinder (VC) technique to measure bulk density. The VC technique suffers from several major drawbacks. In particular, it is difficult and time-consuming to use. Furthermore, errors are produced when sampling different soil depths under a range of field conditions. This research introduces the design, implementation, and testing ...
DOI:
10.1016/j.compag.2018.11.015

10. Relationship between land tenure and soil quality: Evidence from China’s soil fertility analysis

Author:
Lyu, Kaiyu; Chen, Kevin; Zhang, Huaizhi
Source:
Land use policy 2019 v.80 pp. 345-361
ISSN:
0264-8377
Subject:
agricultural soils; arable soils; soil fertility,   etc   ; economic incentives; land tenure; leasing; phosphorus; potassium; soil quality; China;     Show all 10 Subjects
Abstract:
... The paper analyzes the causal relationship between farmers’ renting behavior and arable land quality using unique farmland soil quality test data in China. The paper looks into land quality changes in different places at different time and investigates the robustness of the above relationship using Propensity Score Matching method. The paper finds that the phosphorus and potassium content in rente ...
DOI:
10.1016/j.landusepol.2018.09.002

11. Water-stable aggregates and carbon accumulation in barren sandy soil depend on organic amendment method: A three-year field study

Author:
Dai, Hongcui; Chen, Yuanquan; Liu, Kaichang; Li, Zongxin; Qian, Xin; Zang, Huadong; Yang, Xiaolei; Zhao, Yingxing; Shen, Yawen; Li, Zhejin; Sui, Peng
Source:
Journal of cleaner production 2019 v.212 pp. 393-400
ISSN:
0959-6526
Subject:
sandy soils; soil aggregation; soil management,   etc   ; biochar; biogas; field experimentation; microbial biomass; nitrogen; pollution; soil microorganisms; soil organic carbon; soil quality; straw; wastes; water stable soil aggregates; China;     Show all 16 Subjects
Abstract:
... Organic amendment has proven to reduce resource waste and environmental pollution, in addition to increasing soil quality. However, the effect of different organic amendment methods on water-stable aggregates and soil organic carbon (SOC) accumulation is unknown, especially in barren sandy soil. A field experiment with four organic amendment methods, straw (ST, local practice), biogas residue (BR) ...
DOI:
10.1016/j.jclepro.2018.12.013

12. Rapid determination of soil classes in soil profiles using vis–NIR spectroscopy and multiple objectives mixed support vector classification

Author:
Chen, S.; Li, S.; Ma, W.; Ji, W.; Xu, D.; Shi, Z.; Zhang, G.
Source:
European journal of soil science 2019 v.70 no.1 pp. 42-53
ISSN:
1351-0754
Subject:
soil color; soil horizons; soil organic matter,   etc   ; calibration; databases; models; prediction; soil profiles; soil surveys; soil taxonomy; soil texture; spectral analysis; spectroscopy; support vector machines; uncertainty; China;     Show all 16 Subjects
Abstract:
... Visible‐near infrared (vis–NIR) spectroscopy can reveal various soil properties and facilitate soil classification. However, few studies have attempted to classify vertical soil profiles that contain several genetic horizons. Here, we propose the ‘multiple objectives mixed support vector classification’ (MOM–SVC) method to classify soil profiles. A total of 130 soil profiles were collected from ge ...
DOI:
10.1111/ejss.12715

13. Dynamics of pore functions and gas transport parameters in artificially ameliorated soils due to static and cyclic loading

Author:
Zhai, Xiafei; Horn, Rainer
Source:
Geoderma 2019 v.337 pp. 300-310
ISSN:
0016-7061
Subject:
clay loam soils; silt loam soils; soil compaction,   etc   ; aeration; air; diffusivity; permeability; porosity; sand; soil physical properties; soil quality;     Show all 11 Subjects
Abstract:
... Soil compaction is one of the main threats to sustain soil quality in modern agriculture. To improve our understanding concerning the interaction between soil physical properties and stress-strain on pore functions and soil aeration, measurements were performed with three different textures (sand, silt loam, clay loam), two matric potentials (−60 and −300 hPa), three compaction levels (50, 100 and ...
DOI:
10.1016/j.geoderma.2018.09.039

14. Evaluation of a machine to determine maximum bulk density of soils using the vibratory method

Author:
Leonard, Lynessa; Ekwue, Edwin I.; Taylor, Anika; Birch, Robert
Source:
Biosystems engineering 2019 v.178 pp. 109-117
ISSN:
1537-5110
Subject:
clay loam soils; clay soils; sandy soils,   etc   ; buildings; bulk density; equipment; roads; sand fraction; soil compaction; soil density; water content;     Show all 11 Subjects
Abstract:
... Engineering buildings and other structures such as dams and roadways require soil compaction during construction, so as to limit settling of structures after construction. Optimum water content that results in the maximum soil density is normally desired, so that compaction could be done at this water content. This has to be determined by prior laboratory soil tests usually carried out using the s ...
DOI:
10.1016/j.biosystemseng.2018.11.006

15. Evaluation of a novel electromechanical system for measuring soil bulk density

Author:
Al-Shammary, Ahmed A.G.; Kouzani, Abbas Z.; Saeed, Thamir R.; Lahmod, Nabil R.; Mouazen, Abdul M.
Source:
Biosystems engineering 2019 v.179 pp. 140-154
ISSN:
1537-5110
Subject:
clay loam soils; sandy loam soils; silt loam soils,   etc   ; bulk density; dielectric properties; evaporation; information management; microwave drying; silty clay loam soils; silty clay soils; soil density; soil depth; soil texture; soil water; specific energy; technology; water content;     Show all 17 Subjects
Abstract:
... Digital electromechanical system (DES), consisting of automatic sample collection, on-site microwave drying and weighing is a novel technology for soil bulk density measurement. The study investigates the potential use of the DES for in situ measurement of bulk density, and evaluates the thermal efficiency and specific energy consumption during measurement. The experiment was conducted in eight fi ...
DOI:
10.1016/j.biosystemseng.2019.01.007

16. Characteristics of water–heat variation and the transfer relationship in sandy loam under different conditions

Author:
Hou, Renjie; Li, Tianxiao; Fu, Qiang; Liu, Dong; Li, Mo; Zhou, Zhaoqiang; Li, Linqi; Yan, Jiawen
Source:
Geoderma 2019 v.340 pp. 259-268
ISSN:
0016-7061
Subject:
frozen soils; sandy loam soils; soil resources,   etc   ; cold; cold zones; crops; freezing; frost; heat; ice; planting; potential energy; soil temperature; soil water; soil water content; spring; water content;     Show all 17 Subjects
Abstract:
... The soil freezing process affects the distribution of soil water and heat, influencing decisions on the planting of spring crops. To reveal the redistribution characteristics of soil moisture and temperature and their response factors in the unidirectional freezing process, an indoor unidirectional freezing test was carried out. Three levels of initial moisture content (18.84%, 23.43%, 28.78%), th ...
DOI:
10.1016/j.geoderma.2019.01.024

17. Impacts of biochar application on upland agriculture: A review

Author:
Palansooriya, Kumuduni Niroshika; Ok, Yong Sik; Awad, Yasser Mahmoud; Lee, Sang Soo; Sung, Jwa-Kyung; Koutsospyros, Agamemnon; Moon, Deok Hyun
Source:
Journal of environmental management 2019 v.234 pp. 52-64
ISSN:
0301-4797
Subject:
polluted soils; soil erosion; soil organic carbon,   etc   ; alkalinity; best management practices; biochar; crop yield; crops; food security; highlands; salinity; soil pH; soil quality; topsoil; upland soils; water content;     Show all 16 Subjects
Abstract:
... Soil degradation has become an emerging global problem limiting sustainable upland crop production. Soil erosion, soil acidity, low fertility, inorganic/organic contamination, and salinization challenge food security and lead to severe economic constraints. Therefore, a new research agenda to develop cost-beneficial amendments for improving upland soil quality and productivity is urgently required ...
DOI:
10.1016/j.jenvman.2018.12.085

18. Variations in soil δ13C with alpine meadow degradation on the eastern Qinghai–Tibet Plateau

Author:
Zhao, Yunfei; Wang, Xia; Ou, Yansheng; Jia, Haixia; Li, Jia; Shi, Changming; Liu, Yang
Source:
Geoderma 2019 v.338 pp. 178-186
ISSN:
0016-7061
Subject:
soil chemical properties; soil depth; soil organic carbon,   etc   ; alpine meadows; biomass; carbon nitrogen ratio; monitoring; physicochemical properties; regression analysis; soil profiles; soil texture; soil water; stable isotopes; China;     Show all 14 Subjects
Abstract:
... The alpine swampy meadow is a unique meadow type on the eastern Tibetan Plateau and is undergoing degradation. However, little is known about the responses of soil δ13C to alpine meadow degradation. Monitoring the β value, which is the slope of the linear regression relating soil δ13C to the logarithm of soil organic carbon (SOC) content, provides an approach to infer SOC dynamics. In this study, ...
DOI:
10.1016/j.geoderma.2018.12.005

19. Measurements and simulations of rut depth due to single and multiple passes of a military vehicle on different soil types

Author:
Vennik, Kersti; Kukk, Peeter; Krebstein, Kadri; Reintam, Endla; Keller, Thomas
Source:
Soil & tillage research 2019 v.186 pp. 120-127
ISSN:
0167-1987
Subject:
arable soils; grassland soils; peat soils,   etc   ; bulk density; clay; land use; mechanical properties; models; prediction; sand; soil compaction; soil sampling; soil texture; traffic; Estonia;     Show all 15 Subjects
Abstract:
... Accurate prediction of rut depth caused by military vehicles trafficking is crucial for the success of their mission. In addition to the operational aspect of trafficability and mobility, military vehicle traffic can lead to severe degradation of soil functions. The objective of this study was (i) to examine rut depth formation and bulk density changes after one and repeated passages of a military ...
DOI:
10.1016/j.still.2018.10.011

20. Accumulation of organic carbon and its association with macro-aggregates during 100 years of oasis formation

Author:
Li, Chenhua; Li, Yan; Xie, Jiangbo; Liu, Yan; Wang, Yugang; Liu, Xuecan
Source:
Catena 2019 v.172 pp. 770-780
ISSN:
0341-8162
Subject:
desert soils; soil aggregates; soil aggregation,   etc   ; agricultural land; crop residues; microbial biomass; mountains; nitrogen; oases; pH; soil nutrients; soil organic carbon; soil profiles; sustainable agriculture; topsoil; Central Asia;     Show all 16 Subjects
Abstract:
... The maintenance and accumulation of soil organic carbon (SOC) is critical to the agricultural sustainability and environmental stability in oasis-desert belts. The objective of this study was to determine the effects of oasis formation on SOC and aggregate structure, as well as the linkage between them, throughout a 0–200 cm soil profile. The investigation was conducted in five oases at the northe ...
DOI:
10.1016/j.catena.2018.09.044