Policy impli- cations of human-accelerated nitrogen cycling. Pp. 477-516 in The nitrogen cycle at regional to global scales, edited by E. W. Boyer and R. W. Howarth. Dordrecht, The Netherlands: Kluwer Academic Publishers.Mosier AR, Bleken MA, Chaiwanakupt P et al. (2001) Policy ...
Policy implications of human-accelerated nitrogen cycling.Policy implications of human-accelerated nitrogen cycling.Considers the policy implications of human-accelerated nitrogen (N) cycling. Estimation of global N fixation; Characteristics of change in the N cycle; Considerations for policy development; N...
Measurements of δ 18 O NO 3 have begun to further resolve the competing effects of nitrogen fixation and denitrification on ODZ δ 15 N NO 3 values. Sigman et al. (2005) introduced the parameter Δ(15,18) 1 to quantify the fluxes of N cycle processes in subsurface NO 3 ...
Mechanisms that drive P limitation, and their interactions with the N cycle, have received less attention than mechanisms causing N limitation. We identify and discuss six mechanisms that could drive P limitation in terrestrial ecosystems. The best known of these is depletion-driven limitation, in ...
The critical nitrogen concentration of a plant can be defined as the minimum nitrogen concentration required for maximum growth rate at any time. It has been suggested that the relationship between the critical N concentration and dry matter per unit ground area for a wide range of crops is the...
Nitrogen (N) use efficiency (NUE) is an important indicator to evaluate the performance of N use in agricultural systems. Understanding changes in NUE is crucial to improve N management and reduce harmful environmental impacts. Here we analyzed the historical changes in NUE in three agricultural su...
Abiotic ammonium formation in the presence of Ni-Fe metals and alloys and its impli- cations for the Hadean nitrogen cycle. Geochem. Trans. 9, 5.Smirnov A, Hausner D, Laffers R, Strongin DR, Schoonen MAA. 2008. Abiotic ammonium formation in the presence of Ni-Fe metals and alloys ...
Hot volcanic vents promote the thermal fixation of atmospheric N 2 into biologically available forms. The importance of this process for the global nitrogen cycle is poorly understood. At Masaya volcano, Nicaragua, NO and NO2 are intimat... TA Mather,DM Pyle,AG Allen - 《Geology》 被引量:...
Different combinations of detectors and targets have enabled the LUNA collaboration to extensively study nuclear fusion in different astrophysical environments over the past three decades, including those of the proton–proton (pp) chain, carbon–nitrogen–oxygen (CNO) cycle, and s-process [12]. ...
When the epidemic conditions become suitable again (i.e., high density of viruliferous vector insects at the rice seedling stage) [6], plants become infected, continuing the cycle of intermittent epidemics. This novel interpretation indicates the potential of manipulating microbial communities as a ...