Biological science aide Lindsey Dowswell prepares to separate soil aggregates while physical science technician Ed Buenger washes a separated aggregate sample off of a soil sieve into a container to determine the amount and origin of the carbon sequestered in the sample. This research is part of the GRACEnet project (Greenhouse Gas Reduction through Agricultural Carbon Enhancement Network), which is trying to determine the levels of carbon sequestration and greenhouse gas production of various agricultural practices.