What does soil consist of?

What is Parent Material?

Physical (mechanical) Weathering

Weathering

Chemical Weathering

Biological Weathering

Erosion

What are some biological processes that affect soil?

Humus

What is Lignin and what is it's role with bacteria & humus?

Soil Profile Horizons

Soil profile

Topsoil

Leaching

What are the properties that classify soils

Soil Colour

Soil Texture Classification

Loam

Which types of soils are best for plant growth and crop agriculture?

Soil Structures

Plow Pan

Soil pH

Soil Clump

What is Cation Exchange?

What is Cation Exchange Capacity?

How is cation exchange vital for plant growth?

Agriculture

Cropland

Rangeland / Pasture

Soil

How does consumption and population effect/degrade soil?

Green Revolution

Solutions to soil degradation

Examples of how regional differences in soil traits affect agriculture

What causes erosion?

What are the impacts of erosion on ecosystems and agriculture?

What is Desertification?

What is the dust bowl and how did it happen?

crop rotation

Contour farming

Intercropping and agroforestry

Terracing

Shelterbelts

Reduced tillage

Irrigation

waterlogging

What is Salinization, what does it cause, and how can it be prevented/corrected?

What are fertilizers, and what are the pros/cons of them?