SOIL SURVEY MAP READING

Discussion and ActivityEnvironmental Science

Soil As A 3- Phase System Soil Particles Water Films and Trapped Gases in Pores Solids and Aggregates

Water is the Driving Force

Water Movement affects: A. Detachment B. Transport C. Deposition

Types of Erosion Affecting Soil Quality

Rill and Inter-rill

Gully (most aggressive)

Splash

Gully Erosion

Inter- rill Erosion

Splash Erosion

How Does Soil Form?

Physical and Chemical Weathering

Wind and Water Mixtures and Solvents

What is Soil Composed Of?

Rocks and MineralsLiving Organisms = worms, bacteria, insects, fungiDecayed Organics= plants and animalsAggregates= rocks and pebblesMoistureTrapped Gases= air, methane, others

Types of Soils

LOAM is bestFor

SOIL FERTILITY

Soil Survey Activity

Using the Colored General Soil Map and Legend, describe the soils

Found in a five mile radius around each that follows:

A. Sleepy Eye

B. B. Searles

C. C. Comfrey

D. One of your choice

Use of Tables

Use the Tables Section starting on page 114. Answer the following:

a. What trees grow in “Webster” Soils?

Soil Textures and Composition

What kind of soil doe Cobden have? Find the soil textures and composiition.

Choose another location of your homestead or of a classmate’s.

Understanding Symbols

Symbol 495 stands for what soil type?

Select another symbol and meaning of your choice.

Give the symbols for soils in a five mile radiusAround Sleepy Eye.