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 6 of 6 for “"macro nutrient"”.
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Decoupling of iron and phosphate in the global ocean
Iron (Fe) is an essential micronutrient for marine phytoplankton often limiting phytoplankton growth due to its low concentration in the ocean and thus playing a role in modulating the ocean's biological pump. In order to understand controls on global Fe distribution, the decoupling between Fe and …
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Physical Control of Biological Processes in the Central Equatorial Pacific: A Data Assimilative Modeling Study
… a small amount of supplemental <em>in situ</em>nutrient data. As expected, deterioration in simulation skill is more severe when assimilating biased data, as compared to data containing random noise.</p> <p>When actual EqPac cruise data and SeaWiFS ocean color data are assimilated, one can …
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Moderately-rapid assessment of alkaline desiccation environmental systems
… the pre-test acclimation period. With low macro-nutrient concentrations, a mean carbon/nitrogen ratio of 14.0 ± sd 6.1, and a mean volatile solids value of 15.9 ± sd 6.9 indicative of low organic matter, the finished waste had limited agricultural value, however, the treatment process did …
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Geochemical investigation of the co-evolution of life and environment in the Neoproterozoic Era
… the availability of nitrate, an important macro-nutrient, played a critical role in this evolutionary event, nitrogen isotope compositions (δ<sup>15</sup>N) of marine carbonates from the early Tonian (ca. 1000 Ma to ca. 800 Ma) Huaibei Group in North China were measured. The data indicate …
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Soil properties, lime and phosphorus fertiliser management affecting grass production in Ireland
<p class="MsoNormal">Phosphorus (P) is a macro nutrient and is an essential element required by grasslands for optimum production and herbage P concentration for animal dietary requirements. However phosphorus is a finite resource and efforts must be made to reduce P needs in grassland to prolong …
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Effects of Litter Production, Biochemistry and Plant Community Composition on Carbon and Nutrient Cycling under Elevated Carbon Dioxide and Tropospheric Ozone.
… affect litter decomposition, thereby controlling nutrient release rates and soil carbon formation. To assess those effects, leaf litter was collected from aspen (Populus tremuloides Michx) and birch (Betula papyrifera Marsh) communities in 2003 at Aspen Free-Air Carbon Dioxide Enrichment …