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Quantifying Topsoil Microstructure Dynamics in Agroforestry Riparian Buffers using X-ray Computed Tomography

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Title: Quantifying Topsoil Microstructure Dynamics in Agroforestry Riparian Buffers using X-ray Computed Tomography
Author: Lagounova, Anastassia
Department: School of Environmental Sciences
Program: Environmental Sciences
Advisor: Heck, Richard
Abstract: This study quantified the topsoil microstructure, including the soil matrix and void morphology, under established agroforestry riparian buffers within the Grand River watershed, in Southern Ontario, using X-ray Computed Tomography. Agroforestry systems were selected based on soil texture (loam/clay soils), forest age (mature/young) and forest type (deciduous/coniferous). When comparing age, tree type and soil texture, variations in the spatial distribution of the topsoil microstructure were identified. Results found that the radiodensity distribution of the topsoil under mature agroforestry systems on loam soils had a more heterogenous pattern, compared to soils under young agroforestry systems on clay soils. All attributes of the topsoil structure were found to exhibit temporal differences when comparing the soil structure from mid-spring sampling compared to early summer and late fall sampling, suggesting that processes that occur during winter and post-winter have a dynamic influence on the distribution of the topsoil structure under agroforestry riparian buffers.
URI: https://hdl.handle.net/10214/21290
Date: 2020-09
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