Grade 8 Agriculture Section B Review

Physical Methods for Weed Control

Grade eight learners identified three specific physical means to control weeds on their project plots:

  • Up-rooting: The process of pulling weeds out of the ground along with their roots to prevent regrowth.

  • Hand picking: The manual removal of weeds from the soil by hand.

  • Use of tools: Utilizing garden implements to clear weeds. Specific tools mentioned include:

    • Jembe (a traditional hoe used for digging and weeding).

    • Rake.

Causes of Soil Pollution on the School Farm

There are four primary causes identified for soil pollution within the school farm environment:

  • Improper dumping of chemicals: The incorrect disposal of agricultural or other chemical substances into the farm area.

  • Disposal of non-decomposable waste: Throwing un-composable waste (materials that do not rot or break down naturally) into the farm.

  • Waste water disposal: Throwing or pouring waste water directly into the soil.

  • Littering: General littering of waste materials across the soil surface.

Water Harvesting and Soil Conservation

Methods of Storing Harvested Water

To effectively manage water resources, three methods of storing harvested water were identified:

  • Use of gutters: Utilized as part of the collection system to direct water into storage.

  • Water ponds: Open areas constructed to hold large volumes of collected water.

  • Tanks: Large containers used for the secure storage of harvested water.

Construction of Trash Lines for Soil Conservation

Grade eight learners were advised to lay vegetative materials along the contour of the land to create trash lines. This practice helps in soil conservation and moisture retention. The following crop residues are commonly used to construct these lines:

  • Maize stalk: The dried stems of harvested maize plants.

  • Banana Leaves: Large leaves from banana plants used as mulch or barrier material.

  • Plant Leaves: General vegetative leaves from various crops.

Innovative Kitchen Gardens

Innovative kitchen gardens allow for the cultivation of crops in limited spaces or using specialized techniques. Examples include:

  • Horizontal innovative kitchen garden.

  • Vertical innovative garden.

  • Sack and container innovative garden.

Cooking Methods: Grilling

Grilling is defined as a method of cooking that involves exposing food directly to heat. There are four primary benefits associated with grilling:

  • Reduction of Fat: The process helps in removing fat from meat as it melts and drips away during cooking.

  • Speed: Grilling is an efficient method that cooks food quickly.

  • Minimal Labor: The process does not involve a lot of work compared to more complex cooking methods.

  • Flavor Enhancement: Direct exposure to heat flavors the food, often producing a distinct seared or charred taste.