Scientists classify soil based on factors such as mineral content, texture, drainage capacity, and fertility. Globally, the 7 most common types of soil form the basis of farming and ecosystem balance: ...

The Keys to Soil Taxonomy, 13th edition, has been posted to USDA’s Natural Resources Conservation Service website. The Keys to Soil Taxonomy provides the taxonomic keys necessary for the ...

The intricate roles of soil microorganisms in ecological processes such as organic matter decomposition, nutrient cycling, ...

The soil is formed when rocks are broken down by the action of wind, water and climate. This process is called weathering. The characteristic features of a soil depend upon the rocks from which it has ...