This Topic in Depth explores the world of frozen soil, including permafrost and tundra. The first site is provided by the Missouri Botanical Gardens Web site, entitled Tundra (1). This kids focused site does a good job of clearly explaining what tundra is, where it's located, and what types of plants and animals are found within tundra areas, as well as offering a photo gallery. The second site,...

This Web site contains a June 2003 report from the Economic Research Service of U.S. Department of Agriculture. The report offers a detailed analysis of livestock and poultry manure management for water quality in the U.S. The studies included in the report occur on multiple scales: 1) a farm-level analysis of "on-farm technical choice and producer costs" across the U.S., 2) a regional analysis of...

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...

Soil is home to vast numbers of organisms, and even small sections of earth teem with a diverse array of life. This Topic in Depth takes a closer look at the world beneath our feet through the lens of soil biologists and ecologists. The first website (1) provides information about the activities of a Natural Environment Research Council-supported research program "on the biological diversity of...