Perspective -- Geologic time : The quaternary period ; Archeology ; Estimating geologic time ; Early estimates of geologic time -- Weathering and erosion : Structure of the rocks ; Structure in ...

Philosophies of soil classifications : from is to does / S.W. Buol -- How good is our soil classification? / R. Dudal -- Soil classification : past and present / Robert J. Ahrens, Thomas J. Rice, Jr., ...

A University of Missouri doctoral student has developed a technique that uses digital imaging of soil samples to take some of the guesswork out of wetland identification. Identifying wetlands isn't ...

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