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Dissertations / Theses on the topic 'Soil Site Index'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Klinka, Karel, R. E. (Reid E. ). Carter, and Christine Chourmouzis. "Relationships between coastal Douglas-fir site index and synoptic categorical measures of site quality." Forest Sciences Department, University of British Columbia, 2001. http://hdl.handle.net/2429/682.

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Knowledge of ecological characteristics of trees, sites and tree growth on different sites is fundamental for silvicultural decision-making and planning. With the biogeoclimatic ecosystem classification in place, silvicultural management in British Columbia has been given an ecological foundation; however, relationships between growth and site have not yet been fully investigated. The purpose of this study was to determine how height growth of Douglas-fir within the drier portion of the CWH zone varies with site. We adopted site index (m @ 50 yr bh) as a species-specific measure of forest p

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2

Burger, Mark Allen. "A wetland trafficability hazard index based on soil physical properties and site hydrology evaluations." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/42629.

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Harvesting of forested wetlands in the Atlantic and Gulf lower coastal plains has the potential to cause intense site disturbance. Often, as a result of poor pre-harvest planning, silvicultural activities are performed on wetland soils highly susceptible to rutting and puddling. Potential decreases in pine productivity have been connected with increased soil strength and decreased aeration that are commonly remnants of site disturbances associated with wet-weather harvesting. A simple and economical rating system is needed to identify soils susceptible to disturbance by various types of equipm

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3

Klinka, Karel, Gordon J. Kayahara, and Christine Chourmouzis. "Relationship of site index to estimates of soil moisture and nutrients for western redcedar in south coastal British Columbia." Forest Sciences Department, University of British Columbia, 1997. http://hdl.handle.net/2429/765.

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Where timber production is the primary management objective, knowledge of the relationship between the potential productivity of candidate tree species and levels of light, heat, nutrient, moisture and aeration is necessary for species- and site-specific decision making. For example, foresters need to decide which tree species to regenerate on a particular harvested area to obtain maximum sustainable productivity. Similarily, when considering the application of silvicultural treatments such as spacing or fertilizing, foresters need to determine whether the potential productivity of a particul

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4

Klinka, Karel, Pal Varga, and Christine Chourmouzis. "Quantitative characterization of field-estimated soil nutrient regimes in the coastal forest." Forest Sciences Department, University of British Columbia, 1999. http://hdl.handle.net/2429/702.

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One of the key factors in the site classification of the biogeoclimatic ecosystem classification is soil nutrient regime. Soil nutrient regime (SNR) represents the amount of essential soil nutrients available to plants over a period of several years. SNRs classes are assessed based on field identifiable (qualitative) criteria, not using quantitative measures. There have been several studies that attempted to quantitatively characterize regional soil nutrient gradients in the Coastal Western Hemlock (CWH) zone. In the study summarized here, the soils are influenced by a perhumid cool mesotherma

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5

Klinka, Karel, Bernhard E. Splechtna, and Christine Chourmouzis. "Quantitative characterization of field-estimated soil nutrient regimes in the subalpine coastal forest." Forest Sciences Department, University of British Columbia, 1999. http://hdl.handle.net/2429/759.

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Site classification in the biogeoclimatic ecosystem classification system is based on three differentiating properties: climatic regimes (expressed by biogeoclimatic subzones or variants), soil moisture regimes (SMRs), and soil nutrient regimes (SNRs). A SNR represents a segment of a regional soil nutrient gradient, i.e., soils which provide similar levels of plant-available nutrients over a long period. SNRs are identified in the field using a number of easily observable soil morphological properties and indicator plant species. However, we need to know to what extent soil nutrient propertie

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6

Klinka, Karel, Han Y. H. Chen, and Christine Chourmouzis. "Quantitative characterization of field-estimated soil nutrient regimes in the subalpine interior forest." Forest Sciences Department, University of British Columbia, 1999. http://hdl.handle.net/2429/716.

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Site classification of the biogeoclimatic ecosystem classification system is based on climatic regime (expressed by biogeoclimatic subzone), soil moisture regime (SMR), and soil nutrient regime (SNR). A SNR represents a segment of a regional soil nutrient gradient, i.e., a population of soils which provide similar levels of plant-available nutrients over a long period. SNR is identified in the field using a number of easily observable soil morphological properties and indicator plant species. However, we do not know the extent to which soil nutrient properties are supported by these indirect

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7

Klinka, Karel, R. E. (Reid E. ). Carter, Qingli Wang, and M. C. (Michael Charles) Feller. "Influence of salal on height growth of coastal douglas-fir." Forest Sciences Department, University of British Columbia, 2001. http://hdl.handle.net/2429/677.

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The influence of salal on tree growth has attained considerable attention in coastal British Columbia. Field observations, surveys, and studies in the CWH zone have indicated poor growth performance of crop tree species in salal-dominated plantations and natural immature and old-growth stands. Where sites have been burned and planted, tree growth has improved; similar effects have been observed for naturally regenerated stands. Immature stands that developed after wind disturbance or harvesting feature rapid growth and nearly complete absence of salal. As studies have shown that ericaceous pla

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8

Danielsson, Joakim, and Björkman Emilie. "Kan digitala hjälpmedel användas förmer ståndortsanpassade föryngringar?" Thesis, Linnéuniversitetet, Institutionen för skog och träteknik (SOT), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-85578.

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The aim of this study was to investigate if SI from HPR-data from harvesters and soil moisture classes from digital depth to water maps could be used to support site adaption of regenerations within stands. The study was made on pine and spruce stands in central Sweden. The number of plants/ha, plant height, growth and damage were measured at plot level and for these plots also soil moisture classes and SI were derived from digital maps and HPR. The study shows a potential using SI from HPR and depth to water maps for site adaption of regenerations and to vary tree species within stands. Varia

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9

Mannschatz, Theresa. "Site evaluation approach for reforestations based on SVAT water balance modeling considering data scarcity and uncertainty analysis of model input parameters from geophysical data." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-175309.

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Extensive deforestations, particularly in the (sub)tropics, have led to intense soil degradation and erosion with concomitant reduction in soil fertility. Reforestations or plantations on those degraded sites may provide effective measures to mitigate further soil degradation and erosion, and can lead to improved soil quality. However, a change in land use from, e.g., grassland to forest may have a crucial impact on water balance. This may affect water availability even under humid tropical climate conditions where water is normally not a limiting factor. In this context, it should also be con

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10

Klinka, Karel, David Morley New, and Christine Chourmouzis. "Western larch site index in relation to ecological measures of site quality." Forest Sciences Department, University of British Columbia, 2000. http://hdl.handle.net/2429/701.

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A silviculturist needs to know how productivity of all tree species under management varies with the ecological determinants of site quality, i.e., the environmental factors that directly affect the growth of plants - light, heat, soil moisture, soil nutrients, and soil aeration. A good understanding of this variation is necessary for making biologically viable, speciesand site specific silvicultural decisions. Productivity of a given species is usually measured by site index (top tree height at 50 years at breast height age). Quantified relationships between site index of a given species and

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11

Klinka, Karel. "Pacific silver fir site index in relation to ecological measures of site quality." Forest Sciences Department, University of British Columbia, 1999. http://hdl.handle.net/2429/662.

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Ecosystem-specific forest management requires comprehension of tree species productivity in managed settings, and how this productivity varies with the ecological determinants of site quality, i.e., the environmental factors that directly affect the growth of plants: light, heat, soil moisture, soil nutrients, and soil aeration. A good understanding of this variation is necessary for making species- and site-specific silvicultural decisions to maximize productivity. Productivity of a given species is usually measured by site index (tree height at 50 years at breast height age). Quantitative r

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12

Grolle, Michael A. "Development and Lab Calibration of the Pnuematic In-situ Soil Caving Index Sampler (PISCIS)." DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1371.

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The caving/sloughing of sandy layers into drilled shafts is a common and costly phenomenon in the drilling industry. A prototype soil-testing device known as the Pneumatic In-situ Soil Caving Index Sampler (PISCIS) has been developed to test sandy layers above the water table for their propensity to cave/slough into a drilled shaft during the drilling process. The PISCIS fits down a Cone Penetration Test (CPT) hole and uses air pressure to agitate a sample off of the hole wall that is then collected and weighed. Large-scale lab testing was conducted using sand under a variety of simulated over

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13

Klinka, Karel, Gordon J. Kayahara, and Christine Chourmouzis. "Testing site index-site factor relationships for predicting lodgepole pine and interior spruce productivity in central British Columbia." Forest Sciences Department, University of British Columbia, 1998. http://hdl.handle.net/2429/767.

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Knowledge of the potential productivity of a tree species becomes especially important when timber production is the primary management objective. However, direct determination of potential productivity is often not possible. For example, in situations where the site is unstocked, stocked with trees unsuitable for productivity measurement, or stocked with species other than the one of interest. In these cases, an indirect estimate using known characteristics of the site itself is required. Such estimates were made using regression to model site index with indirect measures of site quality for

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14

Lukhele, Nomagugu Precious. "Site-specific environmental risk assessment for phosphorus runoff." Thesis, University of Limpopo, 2014. http://hdl.handle.net/10386/1291.

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Thesis (MSc. Agriculture (Soil Science)) -- University of Limpopo, 2014<br>Phosphorus (P) runoff from agricultural sites and the subsequent loading into surface water bodies contribute to eutrophication. Environmental concerns associated with P loading in soil have motivated the need for the development of a proper tool that will allow farmers to identify agricultural areas or management practices that have the greatest potential to accelerate eutrophication. The objective of the study was to determine the spatial variability of soil test P, soil loss potential of the farm, P application

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15

Onur, Emine Mercan. "PREDICTING THE PERMEABILITY OF SANDY SOILS FROM GRAIN SIZE DISTRIBUTIONS." Kent State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=kent1389550812.

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16

Jiang, Huiquan. "Incorporating Climate Sensitivity for Eastern United States Tree Species into the Forest Vegetation Simulator." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/75220.

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Detecting climate-induced effects in forest ecosystems become increasingly important as more evidence of greenhouse-gas-related climate change were founded. The Forest Vegetation Simulator (FVS) is an important growth and yield model used to support management and planning on public forest lands over the southern United States, however its prediction accuracy was challenged due to its climate- insensitive nature. The goal of this study was to develop species-specific prediction models for eastern U.S. forest tree species with climate and soil properties as predictors in order to incorporate t

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17

Dougherty, John Paul. "Three Essays on the Economic Sustainability of Drought Insurance and Soil Investment for Smallholder Farmers in the Developing World." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1531672015876609.

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18

Smith, David A. "Effect of particle shape on grain size, hydraulic, and transport characteristics of calcareous sand." Thesis, University of Hawaii at Manoa, 2003. http://proquest.umi.com/pqdweb?index=0&did=764803691&SrchMode=1&sid=2&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1233275673&clientId=23440.

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19

Gimenes, Fernando Henrique Setti. "Curva de retenção na avaliação da qualidade física do solo." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-15032013-084354/.

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O solo é um importante recurso natural e a sua conservação é essencial para uma produção sustentável. A qualidade de um solo, por sua vez, pode ser definida como a capacidade deste em exercer sua função em um ecossistema e pode ser descrita por meio de parâmetros físicos, químicos e biológicos. Os atributos físicos do solo descrevem a organização de sua estrutura, de modo que esta é responsável pela movimentação e disponibilidade da solução do solo para as plantas e depende da dimensão, forma e arranjo de suas partículas sólidas e de seus poros. Portanto, a discussão dos mecanismos de moviment

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20

Adjei, Mensah Evelyne. "Dissémination environnementale du chrome en contexte minier : études physique, chimique et isotopique." Electronic Thesis or Diss., Université Paris Cité, 2022. http://www.theses.fr/2022UNIP7060.

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L'étude du cycle des métaux dans l'environnement et de l'impact de l'activité anthropique constitue un enjeu environnemental et sanitaire important. Les sites ultramafiques sont caractérisés par leur faible teneur en nutriments (N, P et K), leur minéralogie dominée par les oxydes de Fe et leur enrichissement naturel en métaux tels que Cr, Fe et Ni. Ces systèmes ultramafiques sont des sites de choix pour les compagnies minières. Les activités minières génèrent plusieurs tonnes de déchets miniers tels que les résidus miniers, les minerais peu concentrés et les terrils. Ces déchets miniers peuven

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21

Zinko, Ursula. "Plants go with the flow : predicting spatial distribution of plant species in the boreal forest." Doctoral thesis, Umeå : Ekologi och geovetenskap, Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-315.

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22

Duke, Belinda Joy. "Reflected in the soil: site formation processes as an index of social and environmental change at the site of Ban Non Wat, NE Thailand." Thesis, 2015. https://researchonline.jcu.edu.au/49875/1/49875-duke-2015-thesis.pdf.

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This thesis examines how social and environmental change is recorded in the stratigraphic profile and reflected in the site formation processes of mounded sites. Previous geoarchaeological studies have focused on sedimentological and radiometric data to examine Iron Age sites on the Mun River Floodplain, looking for correlation between site formation events and social and environmental change through an environmental determinist approach. This thesis moves away from that approach and examines the relationship between site formation processes and social and environmental pressures from the view

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23

Fu, Yi-Jing, and 傅奕靜. "Estimation of Detention Facility Capacity Using the Index of Soil Water Retention in Building Site -The Tainan Science-based Industrial Park case." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/63756969312205818310.

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碩士<br>國立成功大學<br>水利及海洋工程學系<br>89<br>Public constructions and urban developments have being highly increased over last two decades in Taiwan. These tremendous large area developments cause the concentration of runoff and increasing the peak flow, which threaten human’s life and properties. In order to reduce the frequencies of urban flood occurrence, surface runoff and peak flows should be decreased by any ways after the development of these large area construction sites. There are two ways to decrease the surface runoff and peak flows in construction area. Increasing the infiltrati

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24

Mannschatz, Theresa. "Site evaluation approach for reforestations based on SVAT water balance modeling considering data scarcity and uncertainty analysis of model input parameters from geophysical data." Doctoral thesis, 2014. https://tud.qucosa.de/id/qucosa%3A28829.

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Extensive deforestations, particularly in the (sub)tropics, have led to intense soil degradation and erosion with concomitant reduction in soil fertility. Reforestations or plantations on those degraded sites may provide effective measures to mitigate further soil degradation and erosion, and can lead to improved soil quality. However, a change in land use from, e.g., grassland to forest may have a crucial impact on water balance. This may affect water availability even under humid tropical climate conditions where water is normally not a limiting factor. In this context, it should also be con

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25

"Estimating the Soil-Water Characteristic Curve Using Grain Size Analysis and Plasticity Index." Master's thesis, 2011. http://hdl.handle.net/2286/R.I.9215.

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abstract: The infrastructure is built in Unsaturated Soils. However, the geotechnical practitioners insist in designing the structures based on Saturated Soil Mechanics. The design of structures based on unsaturated soil mechanics is desirable because it reduces cost and it is by far a more sustainable approach. The research community has identified the Soil-Water Characteristic Curve as the most important soil property when dealing with unsaturated conditions. This soil property is unpopular among practitioners because the laboratory testing takes an appreciable amount of time. Several author

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26

Chuen, Fu Tzu, and 傅子純. "A Discussion on the Index of Greenery and the Performance of Soil Water Retention of the Construction Sites Development on City Fringes." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/10626715412767225937.

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碩士<br>中國文化大學<br>景觀學系碩士班<br>96<br>Taipei is the best developed city in Taiwan. Improving the living quality and the suitability of the city has always been the government’s major concern of its policy under the expectation of the citizens. At the end of the twentieth century, most advanced countries had worked on drafting and building up Eco-cities. Taipei government has also commissioned professionals and scholars to conduct various researches on resources, space arrangement and setting up indexes, as well as adjusting relevant policies or establishing relevant aelf-covernance articles in rega

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27

Makuleke, Peace. "An assessment of impacts of landfill composition on soil quality, heavy metal and plant health : a case of Lumberstewart landfill in Bulawayo, Zimbabwe." Diss., 2019. http://hdl.handle.net/10500/27575.

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Landfills have served as the major sites for waste disposal in both developed and developing countries. Upon closure of a landfill site, the surface could be converted to a golf course, recreation park, playground, animal refuge, tennis court and industrial site. Even when closed, landfills still have the potential to contaminate the surrounding environment as a result of the migration of leachate from decomposing waste contained in the site. This study focused on assessing the impacts of a closed landfill on soils and plants at Lumberstewart closed landfill site in Bulawayo, Zimbabwe. Soil

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28

Kehlenbeck, Katja. "Rural Homegardens in Central Sulawesi, Indonesia: An Example for a Sustainable Agro-Ecosystem?" Doctoral thesis, 2007. http://hdl.handle.net/11858/00-1735-0000-0006-AFFA-0.

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29

Teixeira, Ana. "Reliability and cost models of axial pile foundations." Doctoral thesis, 2013. http://hdl.handle.net/1822/24556.

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Tese de doutoramento em Engenharia Civil / Geotecnia<br>Pile foundations are often used for important structures, and thus, reliability evaluation is an important aspect of the design. Unlike the approach to reliability evaluation used in structural engineering, the traditional procedure used in geotechnical designs addresses uncertainties through high global or partial safety factors, mostly based on past experience. However, this approach to addressing uncertainties does not provide a rational basis for understanding their influence on design. For this reason, and because of regulatio

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