When it comes to change, the Smithsonian National Museum of Natural History has got it covered. The online exhibitions of their "Forces of Change" series covers the current changes the world is facing, from sky to soil, and everything in between. Exploring the world of soil is the focus of "Dig It! The Secrets of Soil" and visitors can start off by listening to a podcast of a Bureau of Land...

From the National Resources Conservation Service and the US Department of Agriculture, the recently released 1997 National Resources Inventory provides a statistically-based account of "conditions and trends of soil, water, and related resources" on US non-federal lands, including data on wetlands, conservation practices, farmland, land use, and more. The makers claim, "it is the most...

The Natural Resources Conservation Service provides an array of materials to assist people with their understanding of soils. Through an online presentation, users can learn ten key points about soil characteristics and their importance. Teachers and students can find many fun activities including soil erosion and particle size demonstrations and soil songs. The website provides a great...