Lesson Notes By Weeks and Term v4 - SHS 3
EMERGING TECHNOLOGIES IN AGRICULTURE
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EMERGING TECHNOLOGIES IN AGRICULTURE
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Subject: Agricultural Science
Class: SHS 3
Term: 1st Term
Week: 3
Grade code: 3.1.1.LI.2
Strand code: 1
Sub-strand code: 2
Content standard code: 3.1.1.CS.1
Indicator code: 3.1.1.LI.2
Theme: NEW DAWN AGRICULTURE
Subtheme: EMERGING TECHNOLOGIES IN AGRICULTURE
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For generations, Ghanaian agriculture has relied on traditional methods like the cutlass and hoe, and rain-fed farming. While these methods have sustained us, our country now faces new challenges: climate change causing unpredictable rainfall, a growing population to feed, and the need for our youth to see farming as a profitable, modern business. "Emerging technologies" are the new, innovative tools and ideas that can help us overcome these challenges. They represent a "New Dawn" for agriculture, making it more efficient, productive, and sustainable.
A. What are Emerging Technologies in Agriculture?
Definition: Emerging technologies in agriculture (also known as Ag-Tech) refer to new and innovative tools, techniques, systems, and processes that are used to improve the efficiency, profitability, and sustainability of agricultural production.
Think of it this way: The hoe was once a technology. The tractor was a newer technology. Today, we are talking about digital and biological technologies that can make farming even smarter. These technologies often rely on data, automation, and advanced science. B. Key Types of Emerging Technologies
Here are some of the most important emerging technologies relevant to Ghana: Agricultural Drones (Unmanned Aerial Vehicles - UAVs) Explanation: These are small, remote-controlled aircraft equipped with cameras, sensors, and sometimes sprayers. They fly over farms to gather information or perform tasks that would be difficult, time-consuming, or expensive to do from the ground. Key Uses: Crop Monitoring: Drones with special cameras (multispectral sensors) can detect crop stress, pest infestations, or nutrient deficiencies before they are visible to the human eye. This allows for early intervention. Field Mapping: They can create detailed maps of a farm, showing elevation, boundaries, and plant health, which helps in planning. Precision Spraying: Drones can be used to apply pesticides, herbicides, or liquid fertilizers to specific affected areas, rather than spraying the entire field. This saves chemicals, money, and is better for the environment. Ghanaian Example: A large-scale cocoa farmer in the Western Region could use a drone to quickly identify areas affected by Black Pod disease or Swollen Shoot Virus. This allows the farmer to target treatment only to those trees, saving money on fungicides and labour. Precision Agriculture (or "Smart Farming") Explanation: This is a management concept that involves using Information Technology (IT) to ensure that crops and soil receive exactly what they need for optimum health and productivity. It's about managing every part of the farm precisely, rather than treating the whole farm as one unit. Key Components: GPS (Global Positioning System): GPS-guided tractors can plough, plant, and apply fertilizer in perfectly straight lines without overlapping, saving fuel and inputs. Sensors: Soil sensors can be placed in the field to measure moisture levels, pH, and nutrient content in real-time. This data can be sent to a farmer's smartphone. Variable Rate Technology (VRT): This technology combines GPS and sensors. A VRT-equipped spreader can automatically apply more fertilizer to areas of the field that are low in nutrients and less to areas that are already fertile. Ghanaian Example: A commercial maize farmer in the Afram Plains could use soil moisture sensors to manage a central pivot irrigation system. The system would only water the parts of the field that are dry, conserving precious water during the Harmattan season and reducing electricity costs for pumping. Soilless Farming (Hydroponics & Vertical Farming) Explanation: This is a method of growing plants without soil. Hydroponics: Plants are grown in a nutrient-rich water solution. Their roots are either suspended directly in the water or supported by an inert medium like perlite or gravel. Vertical Farming: This is the practice of growing crops in vertically stacked layers, often incorporating hydroponics. It is designed to save space and is usually done in a controlled indoor environment. Key Advantages: Space Efficiency: Ideal for urban and peri-urban areas where land is scarce and expensive (e.g., Accra, Kumasi). Water Conservation: Uses up to 90% less water than traditional soil farming because water is recirculated. Year-Round Production: Not dependent on seasons or weather. Ghanaian Example: A young entrepreneur in Tema can set up a vertical farm in a shipping container to grow high-value crops like lettuce, basil, and strawberries. They can then supply fresh, pesticide-free produce to nearby hotels and supermarkets all year round, generating a stable income. Agricultural Biotechnology Explanation: This involves using scientific techniques to improve plants, animals, and microorganisms for agricultural use. Key Applications: Tissue Culture: A method of rapidly multiplying disease-free planting materials in a lab. It is used extensively for crops like plantain, banana, yam, and pineapple. Genetic Modification (GM): Involves altering the genetic material of a plant to give it desirable traits, such as resistance to pests, diseases, or drought. Ghanaian Example: The Council for Scientific and Industrial Research (CSIR) has used biotechnology to develop improved varieties of cassava that are resistant to the African Cassava Mosaic Virus. Recently, Ghana approved the commercial release of the Pod-borer Resistant (PBR) Cowpea, a GM crop that protects itself from the destructive Maruca vitrata pest, which can cause up to 80% yield loss. This helps farmers increase their harvest and reduce pesticide use.