Lesson Notes By Weeks and Term v4 - SHS 1

Lesson Video

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Performance objectives

• Identify at least three emerging technologies in farming.
• Explain how these technologies ease the work of farmers.
• Discuss the advantages and potential challenges of using them in Ghana.

Lesson summary

Agriculture in Ghana is changing. The old ways of farming, while important, are facing new challenges like climate change, limited land in our growing cities, and the need to produce more food for our population. To solve these problems, we are turning to modern tools and ideas called "emerging technologies." This lesson will introduce you to some of these exciting technologies, specifically how they are making the cultivation of vegetables (like tomatoes, peppers, and cabbage) and beautiful ornamental plants (like hibiscus and roses) easier, more efficient, and even more profitable.

Lesson notes

This section breaks down the key technologies that are transforming how we grow vegetables and ornamental plants. A. Agricultural Drones (Unmanned Aerial Vehicles - UAVs) What is it? A drone is a small, remote-controlled aircraft without a pilot on board. In agriculture, they are equipped with cameras, sensors, and sprayers. How it works in vegetable/ornamental farming: Crop Monitoring: Drones fly over a farm and take high-resolution pictures. Special cameras can detect the health of plants before problems are visible to the human eye. For example, a drone can identify a section of a cabbage farm that is lacking water or nutrients. Precision Spraying: Instead of a farmer carrying a heavy knapsack sprayer and walking through the entire farm, a drone can be programmed to spray pesticides or liquid fertilizers only on the areas that need it. This is faster, uses fewer chemicals, and is safer for the farmer. Ghanaian Example: Imagine a farmer in the Volta Region growing tomatoes. A drone could fly over the field in 20 minutes, a task that would take a person hours to walk. The drone's camera might detect an early-stage pest infestation in one corner. The farmer can then program the drone to spray only that small area, saving money on chemicals and preventing the pests from spreading. B. Soilless Farming (Hydroponics, Aeroponics, Aquaponics) What is it? This is a method of growing plants without using soil. Instead, the plant roots are given a nutrient-rich water solution. Hydroponics: Plants are grown with their roots directly in a nutrient solution. Aeroponics: Roots hang in the air and are sprayed with a nutrient mist. Aquaponics: Combines hydroponics with fish farming. The fish waste provides nutrients for the plants, and the plants clean the water for the fish. How it works in vegetable/ornamental farming: This technology is perfect for high-value vegetables like lettuce, spinach, and bell peppers, and for ornamentals like orchids. It is often done indoors or in controlled environments. Benefits: Saves Space: You can grow more plants in a small area, making it ideal for urban farming in cities like Accra or Kumasi. This is often combined with Vertical Farming, where plants are grown in stacked layers. Saves Water: Uses up to 90% less water than traditional farming because the water is recycled. Faster Growth: Plants often grow faster because they get the exact nutrients they need, directly at their roots. No Weeds: Since there is no soil, there is no need for weeding. Ghanaian Example: A youth group in Madina, Accra, with only a small backyard, could set up a hydroponic system using PVC pipes. They could grow high-quality lettuce to sell to local restaurants and supermarkets, earning a good income from a very small space. C. Greenhouse Technology What is it? A greenhouse is a structure, usually made of transparent material like plastic or glass, that allows farmers to control the growing environment for plants. How it works in vegetable/ornamental farming: Inside a greenhouse, a farmer can control temperature, humidity, and light. This protects crops from harsh weather (like heavy rains or intense sun), pests, and diseases. Benefits: Year-Round Production: Farmers can grow vegetables like tomatoes and sweet peppers even during the off-season, when prices are higher. Higher Quality Produce: The controlled environment leads to healthier plants and better-looking fruits and flowers, which fetch a higher price in the market. Pest and Disease Control: The enclosed structure acts as a physical barrier, reducing the need for chemical pesticides. Ghanaian Example: A farmer near Aburi who specializes in growing delicate ornamental flowers for hotels and events can use a greenhouse to ensure the flowers are perfect and available all year round, regardless of the rainy or dry season. D. Smart Irrigation (Drip Irrigation) What is it? A method of watering plants that delivers water slowly and directly to the base or root zone of the plant. It uses a network of pipes and small emitters. How it works in vegetable/ornamental farming: Instead of flooding a field or using a watering can, a drip irrigation system releases drops of water right where the plant needs it. This can be automated with timers or even soil moisture sensors. Benefits: Water Conservation: It is highly efficient and drastically reduces water waste through evaporation or runoff. This is very important in the drier parts of Ghana, like the Northern regions. Reduces Weed Growth: Since water is only applied to the crop, weeds in between the rows do not get enough water to grow. Fertilizer Application (Fertigation): Liquid fertilizer can be mixed with the irrigation water and delivered directly to the plant's roots, making it more effective. Ghanaian Example: An okro farmer in the Upper East Region can use a simple drip irrigation system connected to a water tank. This would ensure his crops get enough water during the dry season without wasting this precious resource, leading to a much better harvest.

Guided Practice (With Solutions)

(Teacher to lead students through these questions, encouraging discussion)

Question 1: Adwoa wants to start a small farm growing ornamental flowers in the city, but she only has a small concrete backyard. Which emerging technology would be most suitable for her, and why? Solution: Technology: Soilless Farming (specifically Hydroponics or Vertical Farming). Reasoning: Adwoa has no soil and limited space. Hydroponics allows her to grow plants without soil, and vertical farming allows her to stack the plants upwards, making the most of her small area. This method is perfect for urban environments.

Evaluation guide

• Identify other emerging technolo gies used to make growing of vegetable and
• ornamental crops easier.
• Inquiry -Based Learning: Learners in mixed -gender groups, identify other emerging
• technologies used to ease work in vegetable and ornamental cultivation ( e.g., drones that use

Reference guide

• . They could present their idea to the class, explaining how it would work and what vegetables they could grow in it. This encourages creativity, problem-solving, and practical application of the knowledge.