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 11 of 11 for “"nutrient ratios"”.
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Liquid and solids management impact on nutrient ratios for in-line wastewater prefermenters
… characterisation was based on the changes in the nutrients to carbonaceous material ratios across the prefermenter. The evaluation of prefermentation on wastewater nutrient ratio changes was performed under three different sludge operating conditions with regards to sludge elutriation rates, …
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Applying the diagnosis and recommendation integrated system(DRIS) to Fraser fir Christmas trees
The process of diagnosing the foliar nutrient status of Fraser fir [Abies fraseri (Pursh)Poir.] Christmas trees and prescribing fertilizers is not well understood. Agricultural researchers have established critical yield levels for agronomic crops that are objective measures of crop quality and …
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Developing DRIS norms for Fraser fir Christmas trees
… fertilize their crop, a scientifically-based nutrient diagnosis and fertilizer recommendation system is needed. The objective of this study was to develop and test DRIS norms for Fraser fir Christmas trees grown in Virginia for the ultimate purpose of establishing a nutrition diagnosis and …
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Belowground impacts of regenerative agriculture in a South African seed production system
… rate (k), remaining litter mass (g), carbon to nutrient ratios and soil mesofauna community compositions were compared between agricultural treatments, by means of a litter bag experiment (Chapter 3). Multivariate analyses based on decomposition rate with respect to temporal changes showed …
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Insights Into Particulate Phosphorus Dynamics and toxic Algal Bloom Events From A 13-Year Sediment Trap Study In Santa Barbara Basin (CA)
… of P to deep waters and is a source of P to nutrient-depleted surface waters through upwelling and mixing. Changes in nutrient conditions (magnitude and nutrient ratios) can increase the potential for eutrophication and in some cases, facilitate the growth of harmful algal blooms (HABs). One …
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Elemental Stoichiometry of Freshwater Hyporheic Microorganisms
… the bacterial isolates and determined elemental ratios (C:N:P). We tested the hypothesis that while the elemental stoichiometry of freshwater benthic bacteria is mostly homeostatic (doesn’t change significantly when nutrient feed ratios change), the range can vary and is dependent on the taxa. We …
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Elemental Stoichiometry of Freshwater Hyporheic Microorganisms
… the bacterial isolates and determined elemental ratios (C:N:P). We tested the hypothesis that while the elemental stoichiometry of freshwater benthic bacteria is mostly homeostatic (doesn’t change significantly when nutrient feed ratios change), the range can vary and is dependent on the taxa. We …
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Diagnosis of Loblolly Pine (Pinus taeda L.) Nutrient Deficiencies by Foliar Methods
Quick identification of loblolly pine nutrient deficiencies has troubled foresters who wish to increase productivity through fertilization. In the past, extensive field trials were established that did not allow for quick identification of a large number of possibly limiting nutrients in individual …
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Environmental drivers and advective transport of harmful phytoplankton in North West European shelf seas
… within the ESC than adjacent shelf waters. Nutrients, nutrient ratios and light conditions were also found to play major structuring roles in determining phytoplankton assemblage. Data collected during field work can also be useful for regulatory assessment of shelf seas by providing …
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INFLUENCES OF DISEASE-DRIVEN AMPHIBIAN DECLINES ON ECOSYSTEM STRUCTURE AND FUNCTION IN PANAMANIAN HEADWATER STREAMS
… in tropical streams likely regulate flows and ratios of nitrogen (N), phosphorus (P), and carbon (C), influencing ecosystems by altering nutrient supplies to other animals and their food resources. I used ecological stoichiometry as a framework to assess how the sudden loss of consumer …
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Quantifying the Impact of Climate Change on Water Availability and Water Quality in the Chesapeake Bay Watershed
Climate change impacts hydrology, nutrient cycling, agricultural conservation practices, and greenhouse gas (GHG) emissions. The Chesapeake Bay and its watershed are subject to the largest and most expensive Total Maximum Daily Load (TMDL) ever developed. It is unclear if the TMDL can be met given …