LS2.A: Interdependent relationships in ecosystems

Travel underground for an up-close look at the ants, amoebas, and bacteria that maintain healthy soil. Glimpse this microscopic world and learn about the symbiotic relationship between fungi and tree roots.

18 movies on the diversity of organisms found in the soil.

Very detailed, upper level presentation of wetland/hydric soils. Best suited for high school and beyond.

This collection provides a comprehensive assortment of hundreds of classic cases of crop nutrient deficiency documented from research plots and farm fields located around the world.

Very brief discussion of volcanic soils or soils of the Andisol order.

Tropical soils are formed in areas with high annual temperature and rainfall. The intense weathering causes these soils to be nutrient poor and low in organic matter.

An overview of temperate forest soils going through ClORPT.

This reading introduces the connection between biomes and soils.

A distinction between alpine and tundra soils

NRCS Soil Food Web and Soil Biology Primer. This information has been archived but is still valuable. It provides information on the soil food web and the importance of soil organisms for soil health.