Environmental Hazards I

Basic Science JSS3 First term

Sub-theme: learning about our environment

WEEK 3

Environmental Hazards I

Performance objectives

Students should be able to:

1. Define soil erosion
2. State the causes of soil erosion
3. Describe at least three practical methods of preventing erosion in a given farmland

Content

Soil erosion

Soil erosion is a naturally occurring process that affects all landforms. In agriculture, soil erosion refers to the wearing away of a field's topsoil by the natural physical forces of water and wind or through forces associated with farming activities such as tillage.

Erosion, whether it is by water, wind, or tillage, involves three distinct actions – soil detachment, movement, and deposition. Topsoil, which is high in organic matter, fertility, and soil life,…