nitrogen cycle
From shortage to stress on earth: a century of changes in the nitrogen cycle.
... of nitrogen compounds, produced by industrial processes for use in intensive agriculture in addition to those unwittingly produced from human activities, available in excess in the ...
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Overlooked runaway feedback in the marine nitrogen cycle: the vicious cycle
... excess nitrogen (Nxs), and (b) denitrification, is self- limited by the generation of nitrogen deficits (Ndef) that reduce non-fixing phytoplankton export ...vicious cycle con- sisting of positive ...
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Effects of global change during the 21st century on the nitrogen cycle
... Figure 2. Summary of pre-industrial (blue), present (green), and future (purple) estimates of marine biological nitrogen fixation (BNF). Estimate from Carpenter and Capone (2008) repre- sents their summary of the ...
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Assessment of the importance of dissimilatory nitrate reduction to ammonium for the terrestrial nitrogen cycle
... N cycle in different terrestrial ecosystems (forest, agricultural land, grasslands, wetland) should focus not only on “classical” N cycling transformation such as nitrifi- cation and mineralisation, but also ...
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N<sub>2</sub>O emissions from the global agricultural nitrogen cycle – current state and future scenarios
... ria in cropland soils and rice paddies does not necessarily depend on the biomass production of the harvested crop, so we used fixation rates per area r v Nfix. In the case of the MAg- P[r] ...
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Recent advances in the biogeochemistry of nitrogen in the ocean
... tant aspects of the marine nitrogen cycle, there are a number of fundamental issues that remain unresolved. Therefore, a broad synthesis of the current state of our knowl- edge is both timely and necessary ...
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Characterization of the microbial community in a lotic environment to assess the effect of pollution on nitrifying and potentially pathogenic bacteria
... of nitrogen compounds in the aquatic systems and also a source of pathogenic bacteria through the discharge of sewage, we decided to target the microbes related to those specific aspects posed by the urbanisation ...
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Evolution of Microbial Biomasses C and N during the Composting of Municipal solid Wastes
... (C), Nitrogen (N), Phosphorus (P), Sulphur (S) (Vance et ...carbon cycle via the organic matter humification-mineralization ...the nitrogen cycle with transformation of the organic mater into ...
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Nitrogen mass balance in the Brazilian Amazon: an update
... the nitrogen cycle in the ...several nitrogen compounds to the atmosphere (Nardoto et ...new nitrogen input to the system since it is part of the import-export foodstuff balance, this load of ...
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Halogens and their role in polar boundary-layer ozone depletion
... (TOPSE), NItrogen Cycle and Effects on the oxidation of atmospheric trace species at high latitudes (NICE), Out On The Ice (OOTI), Chemistry of the Antarctic Boundary Layer and the Interface with Snow ...
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The Effects of Gap Disturbance on Soil Chemical and Biochemical Properties in a Mixed Beech – Hornbeam Forest of Iran
... total nitrogen, cation exchange capacity (CEC), phosphorus, potassium, calcium, nitrogen mineralization, microbial respiration, earthworms density and biomass of soil samples (0 – 15, 15 – 30 and 30 45 cm ...
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Cycle-to-Cycle Control of the Thermoforming Reheat Process
... However, the present controller, as well as other modules within the cascade feedback loops, still need to be improved. The current plan needs at least an entire cycle, which is equal to 600s, to complete the ...
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All Digital Wide Range Msar Controlled Duty-Cycle Corrector
... duty cycle adjuster does not execute any ...Duty cycle detector detects the duty rate of an output clock and checks whether the duty rate is larger or smaller than ...
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Revista Brasileira de Zootecnia
... on nitrogen intake, nitrogen excretion in the urine expressed in g/day and nitrogen excretion in the form of urea in the urine and urea in the urine expressed in mg/kg live animal weight (Table 2), ...
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Violence as a Vicious Cycle
... Eşe şiddet uygulama ile çocukluk çağı şiddete maruz kalma arasında güçlü bir bağ olabileceği ileri sürülen çalışmada eşine ve çocuğuna şiddet uygulayan yetişkinlerin çocukluk çağı şidd[r] ...
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Santos, Capa, Monge & Rosário.ISEC2000
... Table 6 &umber of students and SE& students. 2nd cycle 3rd Cycle[r] ...
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Practical Use of Nitrogen Gas as a Method for Insect Control in Herbaria.
... uses nitrogen to store artifacts for the long ...with nitrogen sometimes adding silica to keep specimens dry, and set them in a cabinet where they can be stored for up to 30 years (Jason ...to ...
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Total and yeast assimilable nitrogen composition in grape juices of three grapevine cultivars as affected by vineyard nitrogen fertilization
... total nitrogen (TN), free amino nitrogen (FAN) and ammonium content in ...optimal nitrogen fertilization doses which will have positive inluence on the nitrogen compounds ...of nitrogen ...
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Nitrogênio e potássio no cultivo do capim-piatã em solo do Cerrado brasileiro
... between nitrogen and potassium for the first cut evaluation; however, for potassium fertilization, it fitted to the linear regression model with increasing behavior, and an increase of ...
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The Pneumocystis life cycle
... cell cycle have stemmed from ultrastructural images of infected mammalian ...sexual cycle in vivo, Pneumocystis species constitute one of a few excep- ...
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