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 220 for “"total nitrogen"”.
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Natural Nitrogen-15 Abundance and Changes in Total Nitrogen as Influencedby Soil Management
Made available in DSpace on 2014-12-14T14:37:16Z (GMT). No. of bitstreams: 1 7606871.pdf: 2365282 bytes, checksum: f3e5d7d30e2ef03b109d8cac40db8b98 (MD5) Previous issue date: 1975
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Using satellite hyperspectral imagery to map soil organic matter, total nitrogen and total phosphorus
… data for mapping soil organic matter (SOM), total nitrogen (N) and total phosphorus (P). Soil samples collected from Eagle Creek Watershed, Cicero Creek Watershed, and Fall Creek Watershed were analyzed for organic matter content, total N and total P; their corresponding spectral reflectance …
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Using Thermal Units to Predict Biomass Accumulation and Total Nitrogen Uptake for Cover Crops in Arkansas
… improve soil health, increase plant-available nitrogen (N), provide surface residue to prevent erosional soil loss, increase water infiltration, and increase weed suppression. Cover crops growth can be predicted using thermal days or growing degree days [GDD] similar to commodity crops such as …
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Irradiance, total nitrogen, and nitrate-N: ammonium-N ratio requirements for optimal edible biomass production of basil
… was to determine the optimal irradiance, total N concentration, and NO3--N:NH4+-N ratio for greatest edible biomass production of three cultivars of basil (Basilicum ocimum L.) in a controlled-environment production system. Preliminary experiments showed basil required a dark period, but …
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Changes in the Total Nitrogen Content of Certain Tissues of Young Apple Trees During Senescence and Dormancy
Made available in DSpace on 2014-12-12T00:57:20Z (GMT). No. of bitstreams: 1 7212144.pdf: 2486002 bytes, checksum: 84001a841b0e691986fc9ce98c7215c6 (MD5) Previous issue date: 1971
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EFFECT OF PROTEASE SUPPLEMENTATION IN BROILER FEED ON GROWTH PERFORMANCE, CARCASS YIELD AND TOTAL NITROGEN RETENTION IN FECAL MATTER AND LITTER
… broiler performance, carcass yield, and nitrogen retention in fecal matter and litter. Total of 4,800 female (Ross 708) birds split into 96 floor pens, and randomly assigned to one of four treatment groups. Birds were placed within 96, 5’x10’ floor pens in a randomized-block design at the …
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The effect of fertilizers on the vegetative composition of a hay mixture and on the total nitrogen, nitrate nitrogen, and lime requirements of soils planted to different crops
… on the plays. Part II deals with the Nitrates, total Nitrogen, and Lime requirements of the soil on the different plats.
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The ecology and nitrogen-fixing ability of selected Aspalathus spp. in fynbos ecosystems
… the role that this genus may play in the nitrogen economy and ecology of fynbos ecosystems. From the literature it is argued that fire plays a pivotal role in these ecosystems as decomposition is very slow. Decomposition returns nutrients trapped in the vegetation back to the soil. …
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Šiaulių miesto paviršinių vandens telkinių ekologinės būklės įvertinimas /
… and Prudelis pond water quality tests, measured total phosphorus (Pb), total nitrogen (Nb) and chlorophyll „a“ concentration, water transparency. In research period the total phosphorus ranges from 0,031 mg/l to 0,084 mg/l. The biggest concentration of total phosphorus was found in Ginkunai lake, …
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Mathematical Modeling for Nitrogen Removal via a Nitritation: Anaerobic Ammonium Oxidation-Coupled Biofilm in a Hollow Fiber Membrane Bioreactor and a Rotating Biological Contactor
… flux affected reactor performance by improving nitrogen removal and reducing start up time. For the nitritation: anammox-coupled biofilm in an RBC, four different process options were investigated: the number of reactors, the initial anammox (AnAOB) biomass fraction, the bulk oxygen …
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Improving Estuarine Water Quality in South Florida: A Quantitative Evaluation of The Efficacy of a Local Nutrient Ordinance
… County Florida as a reference location. A total of twenty estuarine canal sampling locations were identified in both Lee and Broward Counties. The analysis used data spanning three years prior to (2007-2009) and post (2011-2013) the enactment of the ordinance. This study examined (1) the …
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Developmental changes in nitrogen and protein of tall and dwarf tomato seedlings Lycopersicon esculentum Mill
Tris-soluble protein and total nitrogen of tall and dwarf tomato (Lycopersicon esculentum Mill.) seedlings were determined by the method of Lowry et al. and a modified micro-Kjeldahl direct Nesslerization technique. The tall tomato 'Fireball' differs from the dwarf 'Md. 412-4' in several ways: (1) …
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Treatability of Dissolved Organic Nitrogen in Truckee Meadows Water Reclamation Facility Using Coagulation or Ozone Treatment
… a waste load allocation (WLA) of 500 lbs/day for total nitrogen and a significant portion of the total nitrogen in TMWRF's effluent is comprised of dissolved organic nitrogen (DON). This research addressed the treatability of DON collected from different process streams at TMWRF using ozone (O3) …
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Hindgut secretions in <I> Camponotus pennsylvanicus </I> (De Geer) (Hymenoptera: Formicidae): attractants and nitrogenous excretory materials
… was also examined to determine levels of total nitrogen and identify metabolites in relation to other solid material present. Under laboratory conditions, foragers demonstrated a significant level of attraction to a combined Dufour's gland, poison gland, and rectal sac extract. No response …
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Evaluation of landfill leachate treatability in a modified Ludzack Ettinger activated sludge system
… to determine its effectiveness in removing total nitrogen, organic compounds and metals from the leachate. The system was compared with the effectiveness of a totally aerobic activated sludge system operated in various configurations and at different mean cell residence times (MCRT’s) with …
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Cover Crop Systems Impact on Biomass Production, Carbon-to-Nitrogen Ratio, Forage Quality, and Soil Health Indices in a Semiarid Environment.
… nutritive value and lower tissue carbon-to-nitrogen (C/N) ratios. We also hypothesize that these characteristics will promote greater soil organic carbon, total nitrogen, and microbial biomass and diversity compared to cover crop monocultures. Consequently, the objectives of this 2-yr study …
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Fitness and Physiology of the Hemlock Woolly Adelgid, Adelges tsugae, in Relation to the Health of the Eastern Hemlock, Tsuga canadensis
… similarly by measuring insect biomass, total carbon, carbohydrate, total nitrogen, and amino nitrogen. A. tsugae from moderately impacted trees exhibited significantly greater fecundity; however, A. tsugae from lightly impacted hemlocks contained significantly greater levels of …
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Stormwater Treatment by Two Retrofit Infiltration Practices
… each BMP and analyzed for suspended sediment, total nitrogen, total phosphorus, fecal coliform bacteria and E-coli bacteria. The inflow and outflow concentrations and loads, as well as total inflow and outflow volumes and peak flow rates, were then compared to evaluate how well each BMP reduces …
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Quantifying the Effects of Watershed Size and Land Development on Stream Nutrients
… land use influences the scaling of phosphorus, total nitrogen, ammonia and nitrate loads for very large regions (Mid-Atlantic, Upper Mississippi, Ohio and Missouri) of the U.S. Results show the scaling relationships of nutrient loads with watershed size depends on the nutrient species and …
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