Global ETD Search
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 61 for “"Soil degradation"”.
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Soil degradation: Its aspects and modelling
… region, Sudan. In order to investigate the soil degradation aspects in the study area, its causal, rate per time and mapping; the remote sensing and GIS technologies were used beside the routine soil survey and laboratory analyses. Quantitative information on soils degradation and vegetation …
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Soil degradation in China: implications for agricultural sustainability, food security and the environment
… to address three separate but related issues in soil management in China. In my introductory Chapter, I discuss the background for the soil degradation in China and how soil degradation threatens food security, the environment and agricultural sustainability. In the first essay in Chapter 2, I …
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Numerical modelling of onshore wind turbine gravity foundations susceptible to cyclic soil degradation
… conditions comprised of softer or plastic soil layers, where the effects of cyclic degradation need to be taken into consideration during the design stage. Cyclic degradation refers to the phenomenon in which the stiffness of soil decreases progressively when subjected to cyclic loading. …
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Soil degradation and associated socio-ecological impacts in the drylands of Nakasongola district, Central Uganda
… and selected socio-ecologlcal effects of soil degradation, with the ultimate goal of explaining and mapping the spatial and temporal variations of degradation in the dryland area of central Uganda.
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The Brazilian Cerrado: ecohydrological assessment of water and soil degradation in heavily modified meso-scale catchments
… The impacts of rapid agricultural expansion on soil and water resources are still poorly understood in the region. Therefore, the overall aim of the thesis is to improve our understanding of the ecohydrological processes causing water and soil degradation in the Brazilian Cerrado. I first …
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User-centered design of a fertilizer recommendation system for smallholder farmers
Declining soil health is a major problem in India, affecting nearly 120 million hectares of land constituting 37% of the total geographic area. Soil degradation poses a significant threat to India's food security, due to its negative impact on long-term crop yields, which are crucial for feeding a …
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Simulating long-term food producing capacities in China using a Web-based land evaluation system
… regimes, (b) water stress, (c) limited soil fertility and (d) insufficient crop management. Homogeneous 5 km by 5 km grid datasets of climatic, soil, crop and management parameters were created. Food productions in 2030 and 2050 were simulated using production scenarios involving …
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Off road vehicle soil suitability analysis within the Kisatchie National Forest
Soil degradation due to improper use of off road vehicle (ORV) is among the major problems in the Kisatchie National Forest (KNF), especially in Catahoula (CRD), Evangeline Unit, Calcasieu (ERD), and Kisatchie Ranger (KRD) districts. The USDA-Forest Service (USFS) maintains designated trails within …
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Mapping Soil and Plant Communities: Shifting Western Culture’s Perspectives of Ecological Land Management
… historically share a common trajectory of soil degradation through cyclical technological advancements and soil productivity. A living soil food web provides a holistic approach to eco-regenerative properties as an expression of the soil microbial community (SMC) in relationship to plants …
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Mapping Soil and Plant Communities: Shifting Western Culture’s Perspectives of Ecological Land Management
… historically share a common trajectory of soil degradation through cyclical technological advancements and soil productivity. A living soil food web provides a holistic approach to eco-regenerative properties as an expression of the soil microbial community (SMC) in relationship to plants …
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Mapeamento temporal do uso e ocupação do solo e estimativa das perdas de solo na bacia do reservatório de marés - PB.
For centuries many have caused major erosion of soil degradation in the world besides endangering the population, destroying homes and public facilities causing damage social, economic and environmental. The natural and anthropogenic environments exert a great influence on the use and occupation of …
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Managing scientific change in agricultural policies: soil productivity, resource conservation and the legitimation of agrobiology
… conditions presiding over conceptual changes in soil sciences in Québec since 1960, and the legitimation of research in agrobiology. At the beginning of the seventies, researchers in soil sciences opted for a physico-chemical interpretation of soil fertility phenomena and for a scientific …
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Formulation of Biodegradable Polysaccharide Blend as Replacement of Single-use Plastics
… anti-bacterial activity, water swelling, and soil degradation. A medical-grade plastic barrier film was used as a standard for comparison. Results demonstrate this product yields comparable necessary properties to plastics in current use and could serve as a viable degradable replacement.
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Relação entre resistência mecânica do solo à penetração e textura do solo em área de colheita mecanizada de cana-de-açúcar no litoral paraibano
… and bioenergy has caused acceleration of soil degradation especially in soil physical properties. This problem has been aggravated due to the increasing use of agricultural machinery traffic and frequency of these machines, due to the short periods of planting, to the detriment of weather …
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A Bioinspired Approach to Engineer the Seed Microenvironment
… problems that are linked to climate change, soil degradation and increasing population. In particular, our objective is to augment agricultural outputs (i.e. crop yield and production) while decreasing inputs (e.g. water, energy, fertilizers, land, pesticides) by developing new technology to …
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Two Papers Evaluating the Economic Impact of Agricultural Innovation
… cropping activities designed to decrease soil degradation may contribute to increased incomes for farm households.
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Municipal yard waste composting: process parameters, windrow gases, and leachate quality
… total phosphorus, and biological oxygen demand. Soil degradation processes should ameliorate these. The leaf/grass mix generated the greatest quantities of carbon dioxide, strongly correlated oxygen and carbon dioxide concentrations, steepest temperature profile, and the highest concentrations of …
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Global meta-analysis and metagenomics approach on the soil microbiome associated with cover cropping
Soil nutrient loss is one of the major causes of soil degradation that threatens future global food security. Cover cropping is a promising sustainable agricultural method with the potential to enhance soil health and mitigate consequences of soil degradation. As one of the agricultural practices …
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Mechanisms and management for soil carbon sequestration
Soil organic matter (SOM) holds more carbon (C) than the atmosphere and terrestrial aboveground biomass combined. SOM also provides many other co-benefits in the form of ecosystem services. The rate at which we lose or sequester more C in soils is of great importance for mitigating the rising …
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Physical and Chemical Parameters of Common Soils in the Central Plateau Region of Haiti
Soil degradation is a common occurrence in Haiti that is mainly caused by the cultivation of marginal lands and deforestation, which both contribute to the excessive erosion rate seen in the country today. The Central Plateau of Haiti is a mountainous region in which a majority of the population is …
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