This page provides a brief outline of, lists the main points of, gives links to figures for, and lists the assigned reading for a lecture in Dr. Bruce Railsback's GEOL 1121 class at the University of Georgia. This page is not intended as a set of lecture notes, and it cannot subsititute for a set of lecture notes. Familiarity with this page alone will not assure satisfactory grades on exams in the course.

Lecture 23 (Friday, March 15, 2002): Soils II

Brief outline of this lecture:
Soil development through time
Soils around the world
Soil fertillity and fertilization
Soils in Georgia

Main points of this lecture:
Soils take a log time to develop.
Soil horizons vary with climatic and vegetative setting
Soil mineralogy varies with climatic and vegetative setting.
Soil fertility varies with climate and parent material.
Georgia's soils differ with different parent material and have lost much of their A horizon.
Ancient soils (paleosols) can be preserved where buried under later layers of sedimentary or volcanic rock.

Figures used in this lecture:
Differences in soils across climate zones
Soil fertility in different settings
Soil development through time
Soils in Georgia
Elements used in fertilizers
Paleosols - ancient soils

The soil map shown comes from the US Department of Agriculture.

Reading assignment: pp. 253-268.

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