Question: What’s your favorite soil? Answer: You might just as well ask: Why in the world would someone have a favorite soil?? There are lots of reasons and lots of favorites out there. The State Soils of all 50 states will be on display at the Dig It! exhibit in Sacramento, CA, beginning May 1, … Continue reading What’s your favorite soil?
Question: Why do some soils develop huge cracks when they dry and others don’t? What is it about the soil that causes this? Vertisol showing large cracks during a dry period. Note the pocket knife for scale. Photo: Soil Science Society of America Marbut slide collection. Answer: Some soils have a high content of clay … Continue reading Cracked soil
Question: I recently learned that water exists on Mars. How is water found and measured in such a dry, dusty place? Image: NASA/JPL-Caltech/MSSS Answer: Water on Mars isn’t as easily seen as in the oceans and rivers on Earth, but water is still there—in the soil. While Martian soils appear dry, water can be associated … Continue reading How do scientists measure water on Mars?