neutronovy merak uhliku a dalsich prvku v pude
Team develops new method of hunting for carbon in soil without digging or taking soil sampleshttps://phys.org/news/2022-03-team-method-carbon-soil-samples.htmlThe new method of measurement developed by the Berkeley Lab team eliminates the need to dig anything out of the ground at all. Instead, the as-yet-unnamed device scans the soil with a beam of neutrons. Then a detector senses the faint response of the carbon and other elements in the soil to the neutrons, allowing it to map the distribution of different elements within the soil to a resolution of about five centimeters. All this happens above the ground, with no holes, no cores, and no burning. "It's like giving the soil an MRI," said Persaud, who is a staff scientist in ATAP. "We get a three-dimensional picture of the soil and the carbon distribution in it, along with other elements like iron, silicon, oxygen, and aluminum, which are all important to understand the persistence of carbon in soil."
"What really excites me about this neutron imaging approach is that it lets us effectively and accurately image the carbon distributions in soils at the scales that carbon accounting needs to happen at," added Brodie. "And we can do it repeatedly over growing seasons, to see how it's changing with different climates and land management practices. Eventually you could use this to identify what specific land management practices are more effectively drawing carbon down from the atmosphere and storing it in soil."