Question: How would you describe soil temperature: as a physical property, chemical, or biological? It doesn’t really seem to fit any of those categories nicely, though I’d probably call it a physical property. --Submitted by Thomas Villars, USDA-NRCS Answer: Soil temperature is the measure of how hot or cold the soil is. If you want … Continue reading What is soil temperature?
The reddish colors in this soil from North Carolina are from the iron-oxide hematite. All photos are from the Soil Science Society of America Marbut slide collection. Q: Why do some soils have different colors, for instance the red soils in the South? A: Soils are colored by the minerals or other materials found in … Continue reading The shades of soil
Q: I’ve heard that Florida’s soils are pretty much all sand. Is that true? If so, how can sand be soil? Fig. 1. The soils of Florida A: Many folks have the impression that Florida and its soils are nothing but sand. This is only partially true. Florida actually has a rich range of soils. … Continue reading Florida: Sandbox of the U.S.?
Q: How can soils filter or purify water, such as for drinking water purposes? There are just so many chemicals and bacteria in the soil that you would expect the opposite. Soil: The world's largest chemical reactor (click to enlarge image). A: If we put some soil in a glass column and pour “dirty” water … Continue reading Soil: Largest reactor on the planet?