Lesson Notes By Weeks and Term v4 - SHS 1

Lesson Video

This page supports the lesson note with a companion video and a short classroom-ready summary.

For class groups and homework, share this lesson page so learners also get the summary, objectives, and full lesson context.

Performance objectives

• Identify key farm activities in crop production.
• Explain the importance of soil testing.
• Demonstrate how to measure soil pH.
• Understand methods of weeding and fertilization.

Lesson summary

Welcome, future farmers and agricultural scientists! Today, we are exploring the very foundation of how we get food from the farm to our dining tables. In Ghana, agriculture is not just a subject; it's our heritage, our economy, and our lifeline. From the maize for our *banku* and *kenkey*, to the cocoa that supports our nation, everything starts with the principles of crop production. This lesson moves beyond just knowing the steps; it's about understanding *why* we do them and *how* to do them correctly. We will learn that farming is a science and a business that requires skill, knowledge, and careful planning to be successful and sustainable.

Lesson notes

The process of growing crops is a sequence of carefully planned activities called Crop Production Practices. Each practice is based on scientific principles designed to maximize yield, maintain soil health, and ensure a quality harvest. We can group these practices into four main stages. Stage 1: Pre-Planting Operations

These are all the activities done *before* the seeds or seedlings go into the ground. A good start is half the battle won. A. Site Selection: Choosing the right location. Principle: Different crops have different needs. The site must provide the optimal conditions for the chosen crop to thrive. Factors to Consider: Soil Type: Is it sandy, loamy, or clayey? For example, maize and yam grow best in well-drained loamy soil, while rice thrives in heavy clay soils that can hold water. Topography: Is the land flat or sloped? Steep slopes are prone to erosion, washing away precious topsoil. Gentle slopes or flat land are usually preferred. Terracing can be used on slopes. Water Availability: Is there a source of water (river, dam, borehole) nearby for irrigation during the dry season? Vegetation: The type of plants growing naturally can indicate soil fertility. Thick, lush vegetation often suggests fertile soil. Ghanaian Example: You wouldn't try to establish a large-scale cocoa farm in the Accra plains due to the unsuitable climate and soil. You would go to the forest zones like the Ahafo, Western, or Ashanti regions. B. Land Clearing: Removing vegetation to prepare the land for cultivation. Methods: Slashing (with a cutlass), felling trees, stumping (removing tree stumps), and sometimes controlled burning. Mechanised farms use bulldozers. Principle: To remove competition for sunlight, water, and nutrients, and to make subsequent operations easier. Caution: Bush burning is a common but often destructive practice. It destroys soil organic matter, kills beneficial soil microbes, and contributes to air pollution. C. Tillage Operations (Land Preparation): Definition: The physical manipulation of the soil to create a suitable seedbed for crops. Primary Tillage: The initial, deep breaking of the soil. Done with tools like a hoe, plough, or mattock. Principle: To loosen compacted soil, improve aeration and water infiltration, and bury weeds. Secondary Tillage: Follow-up operations to refine the seedbed. This includes harrowing (breaking soil clods), ridging (making ridges for crops like yam and cassava), and levelling (creating a flat surface using a rake). Principle: To create a fine, crumbly soil structure (tilth) that allows for good seed-soil contact and easy root penetration. D. Planting Material Selection: Choosing high-quality seeds or seedlings. Principle: The genetic potential of the seed determines the potential yield of the crop. "Good seed, good harvest." Qualities of a Good Seed: Viable: The seed must be alive and able to germinate. We can test this. Clean: Free from dirt, stones, and weed seeds. Pure: All seeds should be of the same variety. Disease-free: Not carrying any diseases that could infect the new crop. Stage 2: Planting Operations

This is the actual act of sowing seeds or transplanting seedlings. A. Timing of Planting: Principle: To coincide with the onset of reliable rains, ensuring adequate moisture for germination and early growth. Ghanaian Context: Farmers in Southern Ghana plant major season crops in March/April and minor season crops in September. In the North, there is one long rainy season, so planting starts around May/June. B. Planting Methods: Broadcasting: Scattering seeds randomly over the field (e.g., rice, some vegetables). It's fast but can lead to uneven spacing. Drilling/Row Planting: Sowing seeds in rows at a specific depth and spacing (e.g., maize, beans). Principle: This allows for easy movement through the farm for weeding, spraying, and fertilization. It also ensures each plant gets enough space, light, and nutrients. Transplanting: Raising seedlings in a nursery before moving them to the permanent field (e.g., tomato, pepper, cabbage). Principle: This gives delicate plants a strong start in a controlled environment before they face the harsher conditions of the main field. C. Spacing and Planting Depth: Spacing: The distance between and within rows. Principle: Correct spacing prevents overcrowding and competition, leading to healthier plants and higher yields. (e.g., Maize: 75cm between rows, 40cm within rows). Depth: How deep the seed is placed in the soil. Principle: If too shallow, it may dry out or be eaten by birds. If too deep, the seedling may not have enough energy to reach the surface. A general rule is to plant a seed at a depth of 2-3 times its diameter. Stage 3: Post-Planting Operations

These are the management practices from germination until harvest. They are crucial for protecting the crop and ensuring it reaches its full potential. A. Supplying and Thinning: Supplying (or Gap-filling): Replacing seeds that failed to germinate to maintain the correct plant population. Thinning: Removing excess seedlings when too many germinate in one spot. Principle: To achieve the optimal plant population density for maximum yield. B. Weed Control: Principle: Weeds compete with crops for sunlight, water, nutrients, and space, and can host pests and diseases. Controlling them is essential. Methods: Manual (hoeing, hand-pulling), Cultural (mulching to cover the soil), Chemical (using herbicides). C. Fertilizer Application: Principle: To supplement the soil with essential nutrients (like Nitrogen, Phosphorus, Potassium - NPK) that the crop needs to grow strong and produce a high yield. Methods: Broadcasting: Spreading fertilizer evenly over the field. Ring Method: Applying fertilizer in a circle around the base of each plant, avoiding contact with the stem. Ideal for fruit trees and vegetables like tomatoes. Side Placement/Drilling: Applying fertilizer in a band along the crop row. D. Pest and Disease Control: Principle: To protect the crop from damage caused by insects, fungi, bacteria, and viruses that can significantly reduce yield and quality. Methods: Chemical (pesticides, fungicides), Biological (using natural predators), Cultural (e.g., crop rotation to break disease cycles). Stage 4: Harvesting and Post-Harvest Operations A. Harvesting: Gathering the mature crop from the field. Principle: Harvesting at the correct stage of maturity ensures the best quality, taste, and storage life. Harvesting too early or too late reduces quality. B. Post-Harvest Handling: All activities after harvesting to prepare the product for consumption or market. Activities: Processing (e.g., threshing maize, shelling groundnuts), Drying (reducing moisture content to prevent spoilage, e.g., drying cocoa beans), Sorting & Grading, Storage, and Marketing. Principle: To reduce post-harvest losses (which can be very high in Ghana) and maintain the quality of the produce to fetch a better price.

Evaluation guide

• Apply the principles in the crop production practices.
• Initiate T alk for Learning: T eacher puts learners in pairs to brainstorm to come
• up with the various farm practical activities involved in crop production. Some
• learners should be helped with leading questions to enable them to list the various