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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 455 for “"soil properties"”.
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Statistical estimation of soil properties : an application
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1983.
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Maximum likelihood estimation of spatially correlated soil properties
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1985.
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Levee Breach by Overtopping: The Effects of Soil Properties
… design floods. Past studies have shown that soil properties play an important role in the breach development of an overtopped levee. An experimental study has been performed in the Hydraulics Laboratory, University of South Carolina to develop a better understanding on the effect of soil …
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Effects of Mica On Soil Properties For Embankment Construction
… part of the highway construction process, and soils from borrow pits are often used to construct these structures. The soil from these borrow pits is often characterized as needed, on a project by project basis, and is tested for the properties necessary for embankment design. As the upstate of …
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Haptic simulation of naturally occuring textures and soil properties
… realistic haptic (force feedback) simulations of soils and rocks are presented. Mathematical models of the dynamics of a virtual probe mechanically interacting with a virtual object are developed to provide the basis for analysis and simulation. The models then incorporate stochastic inputs in …
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Predicting soil properties using machine learning: a smartphone solution for stakeholders
Soil health is foundational to agricultural productivity, ecosystem sustainability, and climate regulation, yet traditional methods for assessing soil properties are labour-intensive, costly, and limited in spatial resolution. This thesis addresses these limitations by integrating machine learning …
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Tillage and cover cropping effects on soil properties and crop production
… to retain nutrients in the field and improve soil properties, but their adoption within the Midwestern Corn-Belt remains limited. We assessed the effects of integrating five sets of CCs into corn-soybean rotations under no-till and chisel till systems compared with fallow controls on soil …
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Tillage Effects on Soil Properties and Crop Production in Southern Illinois
The Harris et al. (1996) soil quality index (SQI) model was tested and modified according to local and regional conditions by changing the threshold limits and standardized scoring functions (SSF) for soil quality indicators. Soils that had been in 8 years of the NT system had SQI of 0.64 as …
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Long-term effect of crop rotation and tillage on soil properties
… interactive effects of rotation and tillage on soil productivity, and consequently, the long-term effect of these management practices. The objective of this study was to assess the effect of rotation and tillage on soil physical and chemical properties. Continuous corn (Zea mays L.), …
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Relationships of soil test phosphorus with soil properties and phosphorus forms
A comprehensive approach to soil P management in agricultural systems requires a balance between nutritional enhancement of the soil and a reduction in adverse consequences on the environment. Evaluation of forms in which P is present in the soil, dynamics of P transformation across these forms, …
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Effects Of The Soil Properties On The Maximum Dry Density Obtained Fro
… and other structures, the compaction of soils is needed to improve its strength. In 1933 Proctor developed a laboratory compaction test to determine the maximum dry density of compacted soils, which can be used for specifications of field compaction. The Compaction of soils is influenced …
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Soil properties, lime and phosphorus fertiliser management affecting grass production in Ireland
… P fertiliser recommendations do not account for soil type differences, but large differences in fertiliser P responses can exist across differing soil types. The use of this one size fits all P fertiliser recommendation system can result in the depletion or over supply of P fertilisers compared …
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The Influence of Soil Reconstruction Methods on Mineral Sands Mine Soil Properties
… to determine the effect of four different mine soil reconstruction methods on soil properties and associated rowcrop productivity. Treatments compared were 1) Biosolids-No Tillage, 2) Biosolids-Conventional Tillage, 3) Lime+NPK fertilized tailings (Control), and 4) 15-cm Topsoil over lime+P …
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Earthworms in the Urban Environment: Can Population Augmentation Improve Urban Soil Properties?
… functions, and their performance is dependent on soil quality, which is often degraded by human activity. Because earthworms play a key role in soil health, augmenting earthworm populations in urban soils may improve tree performance. However, we know very little about earthworm ecology in highly …
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Diversity of ectomycorrhizal fungi on two reclaimed surface mines differing in soil properties
I analyzed community structure of ectomycorrhizal fungi on white pine (Pinus strobus) on two reclaimed surface mines in eastern Ohio. One site was acidic and metal-stressed, the other was alkaline. Completely different community composition was found on the two sites by PCR/ITS/RFLP analyses of …
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Combining seismic and geotechnical methods to improve the prediction of physical soil properties
… methods having low resolution when assessing the properties of the thin targeting layers of soil as pavement layers. Therefore, this research aim was to evaluate the limitations and reliability of BE procedure in the laboratory and the field. The research had two main stages; laboratory and model …
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The exploitation of acoustic-to-seismic coupling for the determination of soil properties
… one shear S-wave) have been made in artificial soils. The Type-I P and S-wave are predicted to be most sensitive to the macroscopic elastic properties of the frame, whilst the Type II P-wave is predicted to be most sensitive to the hydrodynamic material properties. A loudspeaker source has been …
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