JSS 1 Third Term Agricultural Science Lesson Note – Uses of Weeds and Methods of Weeds Control

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CONTENT:

(1) Uses of weeds

(2) Methods of weeds control

Sub-Topic 1: Uses of weeds

Some weeds are:

1. used as cover crops.
2. used as forage grasses and legumes for feeding animals e.g elephant grass.
3. used to prepare compost and green manure e.g mucuna, pueraria.
4. used to control soil erosion e.g bahama grass.
5. serve medicinal weed e.g lemon grass.
6. used as fuel (firewood) for cooking

EVALUATION:

State five uses of weeds.

Sub-Topic 2: Methods of weeds control

Weed control refers to any deliberate effort made by man to eliminate weed seeds or stop weed growth.

Weeds can be controlled by using following methods:

1. Mechanical weed control
2. Chemical weed control
3. Cultural weed control
4. Biological weed control
5. Physical/mechanical weed control. It may be in the following forms:
6. Hand pulling: The use of hand to remove weeds. It is most effective in the control of annual and biennial weeds of row crops.
7. ii. Hoeing : It entails using hoes to remove weeds.

iii. Mowing: The use of mower to clear weeds.

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