We test the common assumption that organic carbon (OC) storage occurs on sand-sized soil particles only after the OC storage capacity on silt- and clay-sized particles is saturated. Soil samples from a Brookston clay loam in Southwestern Ontario were analysed for the OC concentrations in bulk soil, and on the clay (<2 μm), silt (2-53 μm) and sand (53-2000 μm) particle size fractions. The OC con...

The addition of charcoal (or biochar) to soil has significant carbon sequestration and agronomic potential, making it important to determine how this potentially large anthropogenic carbon influx will alter ecosystem functions. We used column experiments to quantify how hydrologic and nutrient-retention characteristics of three soil materials differed with biochar amendment. We compared three h...

Brian Batell, Maxim Pospelov, 3 and Brian Shuve Pittsburgh Particle Physics, Astrophysics, and Cosmology Center, Department of Physics and Astronomy, University of Pittsburgh, PA 15260, USA Perimeter Institute for Theoretical Physics, Waterloo, ON N2J 2W9, Canada Department of Physics and Astronomy, University of Victoria, Victoria, BC V8P 5C2, Canada SLAC National Accelerator Laboratory, 2575 ...

Sand traps are used to measure Aeolian flux. Since they modify the surrounding wind velocity field their gauging represents an important challenge. We use numerical simulations under the assumption of homogeneous turbulence based on FLUENT to systematically study the flow field and trapping efficiency of one of the most common devices based on a hollow cylinder with two slits. In particular, we...

In the beneficiation of quartz sand, hydraulic classification is a primary way to obtain production in various size fractions. It essential for plants measure particle sand during classification, time evaluate efficiency. However, traditional manual-screening method consumes labor and time, while particle-size analyzer expensive. Thus, size-detection quartz-sand proposed this paper, which based...

Sand dripping in 1 dimensional Sand Pile Model is rst studied. Patterns and signals appear. Their behaviors and interactions are explained and asymptotic approximations are made. The total collapsing time of a single stack of sand is linear in function of the number of grains.