Review of Practical Sessions SS3 Horticulture and Crop Production Lesson Note

Subject: Horticulture and Crop Production 

Class: SS3 

Topic: Final Practical Review (Revision of Specimens, Tools, and Skills)

Why the Practicals Matter

In Agricultural Science, the “Practical” is where the truth comes out. You can read about a Disc Plough in a book, but until you see the curved steel and understand how it cuts through the earth, you don’t truly know it.

The practical exam is worth a huge chunk of your final grade. It tests your Observation (what you see), your Identification (what it is called), and your Application (what it is used for). This lesson is a “walk-through” of the most common things you will find on the laboratory tables during your final exam.

Farm Tools and Machinery (The “Hardware”)

Examiners love to display tools. You must be able to name them and, more importantly, tell us how to keep them from rusting or breaking.

• Hand Tools: Look out for the Hand Trowel, Hand Fork, and Secateurs.
  1. Maintenance: Always say “Clean after use” and “Oil or grease metal parts to prevent rust.”
• Tillage Implements: You will likely see models or photos of the Disc Plough and the Harrow.
  1. The Difference: The Plough is for Primary tillage (breaking the ground for the first time). The Harrow is for Secondary tillage (breaking the big clods of earth into fine soil).
• Surveying Equipment: The Gunter’s Chain, Ranging Pole, and Theodolite. These are used for measuring farm boundaries.

Soil Science Specimens (The “Earth”)

You will often see small jars of soil or rocks. You need to be a “Soil Detective.”

• Soil Types:

1. Sandy Soil: Feels gritty, doesn’t hold water, and falls apart when you squeeze it
2. Clay Soil: Feels sticky when wet, holds too much water, and can be molded into a shape.
3. Loamy Soil: The “Goldilocks” soil. It feels just right, has plenty of organic matter, and is best for most crops.

• Rocks: * Igneous (e.g., Granite): Formed from cooled lava. Very hard.
  1. Sedimentary (e.g., Limestone): Formed from layers of sand or shells. You can often see the layers.
  2. Metamorphic (e.g., Marble): Formed when heat and pressure change one rock into another.

Crop and Pest Identification

This section is about knowing your friends and your enemies in the garden.

• Crop Parts: You might be shown a Corm (Cocoyam), a Bulb (Onion), or a Rhizome (Ginger). You must know how they are planted.
• Weeds: Be ready to identify common weeds like Tridax or Spear Grass.
  1. Why are they bad? They compete with crops for sunlight, water, and space.
• Pests: You might see a Grasshopper, a Weevil, or a Stem Borer.
  1. The Damage: Does it chew the leaves? Does it suck the sap? Or does it bore a hole into the fruit? Knowing the type of damage helps you pick the right pesticide.

Animal Science Specimens

From the poultry house to the cattle ranch, these specimens show how we care for animals.

• Feed Types: You might see Bone Meal, Fish Meal, or Concentrates. Bone meal is for calcium (strong bones and eggshells); fish meal is for protein (growth).
• Animal Parts: An Egg (check for a cracked shell), a Feather, or even a Bone.
• Processing Tools: The Buridizzo (for castration), the Ear Notcher (for identification), or the Dehorning Iron.

Mastering the “Observation” Question

When you sit down at a specimen station, follow this mental routine:

1. Look closely: Is there anything unusual? (e.g., “Specimen A is a leaf with yellow spots”).
2. Be Specific: Don’t just write “Plough.” Write “Disc Plough.” Don’t just write “Rock.” Write “Sedimentary Rock (Sandstone).”
3. Think of the Farmer: If the examiner asks for the “Economic Importance,” think about how this specimen helps a farmer make money or why it causes a loss.

Summary for the Student

The practical exam is not about “cramming” long definitions. It is about Connection. Connect the tool to the job, the soil to the plant, and the pest to the damage. Spend time in the school farm or the lab looking at the real things. If you can identify these specimens and explain their “why,” you are already 80% of the way to an ‘A’.