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 154 for “"agricultural systems"”.
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Management of agricultural systems using mathematical programming
… farms, which have a decisive role in the State's agricultural production. Over recent years, Santa Catarina has been experiencing a fall in rural population, and the State's rural income per capita/year has been decreasing in relative terms, compared to the urban areas. These factors threaten the …
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LOCAL AND LANDSCAPE DRIVERS OF BIOLOGICAL PEST CONTROL IN AGRICULTURAL SYSTEMS
… between pests and their natural enemies in agricultural landscapes. In my doctoral research, I explored how local and landscape composition influence the abundance, behaviors, and traits of insect pests and natural enemies, as well as the complex ecological interactions between them. Chapter …
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Chlorella vulgaris and Scenedesmus quadricauda: diversified applications for environmental and agricultural systems
La multifunzionalità delle microalghe è stato il filo conduttore di questa tesi, centrata sull applicazione di Chlorella vulgaris e Scenedesmus quadricauda come decontaminanti delle acque reflue agricole, biostimolanti per la crescita delle piante e la fertilità del suolo. I principali obiettivi …
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COMPARING LONG-TERM SOIL CARBON CONTENT AND THERMAL STABILITY AMONG DIFFERENT AGRICULTURAL SYSTEMS
… to ensure the soil health and food security. Agricultural management and treatments including organic treatments, tillage, crop rotation, and nutrients management are critical components that are closely linked with soil carbon retention, composition, and stability. Rodale Institute, located …
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Preservation and Deployment of Biofertilizers to Mitigate Soil Phosphorous Loss from Agricultural Systems
… growth, poor root development, and reduced crop agricultural crop yields. While phosphorus is naturally present in the soil, it is often not available in sufficient quantities or in a form that plants can synthesize. The use of phosphate-rich fertilizers has compensated for the low levels of …
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Evaluation of management practices and remediation techniques for improving water quality in agricultural systems
… quality impairment is often associated with agricultural activities. In this study, the effects of three sugarcane residue management techniques, namely burning (BR), shredding (SR), and retention (RR) of residues on: surface water quality, carbon export, and chemical composition of organic …
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A model of nitrate leaching from agricultural systems in the northern neck of Virginia
… VTCROPS models atmospheric, soil and crop subsystems. Atmospheric conditions (rainfall, temperature, solar radiation) may be directly input by the user or generated using a stochastic climatic generator. The soil subsystem simulates runoff, infiltration, drainage and soil-water redistribution, …
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Farming by Satellites: how West Country farmers were being driven to, and by, precision agricultural systems
… transnational firms appropriating control over agricultural industries. Many neo-Marxist or neo-Weberian critics contend that any ‘green’ benefits fall secondary to the more dominant social and economic trend of ongoing capital accumulation, increasing rationalisation and industrial progress …
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Exploring the potential of using remote sensing data to model agricultural systems in data-limited areas
… Ultimately leading to improved local cropping systems knowledge and the capacity to use CMs. As such, the study calibrated the DSSAT-CERES-Maize model using two generic soils (i.e. heavy clay soil and medium sandy soil) which were selected based on literature, to measure soil moisture from 1985 …
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Species and functional diversity effects on productivity and nutrient uptake: implications for designing sustainable agricultural systems in the Midwest
<p>Temporal data on aboveground biomass and nutrient uptake by species and functionally diverse native perennial plant species and communities is needed to enhance the performance of in-field buffer conservation practices. Comparisons on the performance of monocultures and polycultures of four …
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What shapes instruction in course-based undergraduate research experiences? & Spatial, temporal, and structural drivers of soil microbial communities in regenerative agricultural systems
… instructors and students. CHAPTER 2 Conventional agricultural practices degrade soil structure, nutrients, and microbial communities essential for food production. Regenerative agriculture (RA) can counter these effects through practices that support microbial diversity and ecosystem resilience. …
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MULTIFUNCTIONAL EVALUATION AND VALIDATION OF PRACTICES, TOOLS AND INNOVATIVE MODELS FOR THE LANDSCAPE AND AGROECOLOGICAL MANAGEMENT OF AGRICULTURAL SYSTEMS: TRADE-OFFS AND SYNERGIES IN THE ECOSYSTEM SERVICES FRAMEWORK
… of the current ecological crisis. Among rural systems, it is a pivotal driver of agroecosystems vulnerability and lack of resilience. Multi-spectrum solutions are needed, and this is being more and more recognised among all the different levels of agricultural and environmental studies, …
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Improving Retrievals of Crop Vegetation Parameters from Remote Sensing Data
<p>Agricultural systems are difficult to model because crop growth is driven by the strongly nonlinear interaction of Genotype x Environment x Management (G x E x M) factors. Due to the nonlinearity in the interaction of these factors, the amount of data necessary to develop and utilize models to …
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Moths & Legends The contribution of chitoumou, the edible caterpillar Cirina butyrospermi, to food security, agriculture and biodiversity in a low-intensity agroforestry system
… the potential of edible insects in existing agricultural systems to mitigate these problems, with a focus on the role of chitoumou (Cirina butyrospermi), the commonly consumed shea caterpillar harvested from agroforestry systems in Burkina Faso, West Africa. I begin this thesis with a review …
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Exploring indigenous entanglements in extension, land, and agriculture: an Oklahoma case study
There is an extensive and complex history of agricultural and educational systems within the United States. Indigenous peoples maintained highly developed agricultural systems prior to colonization. After colonization, Indigenous and European systems converged in a battle of power that lasted for …
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Agroforestry Preferences, Identity, and Collaboration Potential Among CAR Refugees and Host Community Cameroonians
… incorporation and management of trees in agricultural systems, provides a tool that can respond to both social and ecological challenges by providing conservation farming techniques and increasing diversified home production of many needed products. This research sought to understand the …
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