Lesson Notes By Weeks and Term v4 - SHS 3
PRINCIPLES OF NATURAL RESOURCE CONSERVATION IN AGRICULTURE
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PRINCIPLES OF NATURAL RESOURCE CONSERVATION IN AGRICULTURE
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Subject: Agriculture
Class: SHS 3
Term: 2nd Term
Week: 3
Grade code: 3.3.2.LI.3
Strand code: 3
Sub-strand code: 2
Content standard code: 3.3.2.CS.1
Indicator code: 3.3.2.LI.3
Theme: CONCEPTS OF AGRICULTURE IN AN INDUSTRIALIZING SOCIETY
Subtheme: PRINCIPLES OF NATURAL RESOURCE CONSERVATION IN AGRICULTURE
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Good morning, class. Today, we are discussing a topic that affects every single one of us, whether we are farmers or not: Soil Erosion. In Ghana, our very ability to grow food, from the maize in the north to the cassava in the south, depends on a thin layer of rich topsoil. However, heavy rains and strong winds, especially the Harmattan, are constantly washing and blowing this precious resource away. This process, soil erosion, is a silent enemy to our agricultural productivity, food security, and even contributes to problems like the flooding we see in Accra and other cities.
This section contains the core content for our lesson. Please pay close attention and feel free to ask questions. A. What is Soil Erosion?
Definition: Soil erosion is the process by which the top layer of the soil (topsoil) is detached and transported from one place to another by natural agents. Detachment: This is the loosening of soil particles from the main soil mass. Transportation: This is the movement of the loosened particles by wind or water.
Think of it this way: The topsoil is the "skin" of the earth, rich in nutrients and organic matter that plants need to grow. Erosion is like a wound that removes this skin, leaving behind less fertile ground. B. Agents of Soil Erosion
The two main natural forces that cause erosion are: Water: This is the most common agent of erosion in Ghana, especially during the rainy season. The impact of raindrops and the flow of water over the land surface are powerful forces. Wind: This is a significant agent in drier areas, particularly in the Northern, Upper East, and Upper West regions of Ghana during the Harmattan season.