Now showing items 1-10 of 51
Effect of microbial activity on trace element release from sewage sludge
(American Chemical Society, 2003-06)
The microbial role in mobilization of trace elements from land-applied wastewater sludge is not well-defined. Our study examined the leachability of trace elements (Cd, Cr, Cu, Mo, Ni, P, Pb, S, and Zn) from dewatered ...
Electron microprobe and synchrotron x-ray fluorescence mapping of the heterogeneous distribution of copper in high-copper vineyard soils
(American Chemical Society, 2007-08)
The response of microorganisms to metal contamination of soils varies significantly from one investigation to another. One explanation is that metals are heterogeneously distributed at spatial scales relevant to microbes ...
Individual-based modeling of carbon and nitrogen dynamics in soils: parameterization and sensitivity analysis of abiotic components
(Lippincott, Williams & Wilkins, 2010-08)
The need to predict with reasonable accuracy the fate of soil C and N compounds in soils in response to climate change is stimulating interest in a new generation of microscale models of soil ecosystem processes. Essential ...
Alleviating moisture content effects on the visible near-infrared diffuse-reflectance sensing of soils
(Lippincott, Williams & Wilkins, 2009-08)
With rising ambient temperature and atmospheric carbon dioxide levels, there is an urgent need to monitor soil carbon stocks over large regions of the earth. Near-infrared diffuse reflectance sensing (NIRS) of soils, using ...
Moving away from the geostatistical lamppost: why, where, and how does the spatial heterogeneity of soils matter?
Since the late 1970s, thousands of scholarly articles, books and reports have dealt with the application of the mathematical theory of geostatistics to characterize the spatial “variability” of soils, and to produce soil ...
Accounting for surface roughness effects in the near-infrared reflectance sensing of soils
Near-infrared reflectance sensing (NIRS) has stimulated widespread enthusiasm in recent years among soil scientists, in part for its potential to lead to the design of new “proximal” soil sensors in support of ...
Sticker shock and looming tsunami
(University of Toronto Press, 2010-01)
Recession is currently causing a resurgence of the academic serials crisis. Profit-mongering by commercial publishers is once again denounced as the key driver of the crisis. However, a critical analysis of institutional ...
Comment on “The role of scaling laws in upscaling” by B.D. Wood
Automated statistical method to align 2D chemical maps with 3D X-ray computed micro-tomographic images of soils
Recent 2-dimensional measurements reveal that soils are chemically very heterogeneous at nanometric and micrometric scales. Direct measurement techniques are still lacking to extend these observations to 3 dimensions. ...
Observer-dependent variability of the thresholding step in the quantitative analysis of soil images and X-ray microtomography data
For the investigation of many geometrical features of soils, computer-assisted image analysis has become a method of choice over the last few decades. This analysis involves numerous steps, regarding which subjective ...