DEFINITION AND CHARACTERISTICS OF WEEDS

Subject : Agricultural Science

Topic : DEFINITION AND CHARACTERISTICS OF WEEDS

Class : Basic & / JSS 1

Term : Third Term

Week : Week 1

Instructional Materials :

• Pictures of weeds
• samples of weeds

Reference Materials

• Scheme of Work
• Online Information
• Textbooks
• Workbooks
• 9 Year Basic Education Curriculum

Previous Knowledge :

The pupils have previous knowledge of weeds in their previous lessons

Behavioural Objectives :  At the end of the lesson, the pupils should be able to

• define weeds
• mention at least four types of weeds
• enumerate the characteristics of weeds
• list  economic importance of weeds
• differentiate between weeds and crops

Content :

DEFINITION AND CHARACTERISTICS OF WEEDS

CONTENT

1. Definition of Weeds
2. Some Common Weeds
3. Characteristics of Weeds

Definition of Weeds

Weeds are plants growing where they are not wanted or cultivated. A plant may be weed in one farm but crop in another farm. For instance, a cowpea plant growing in a cassava plot is a weed.

Some Common Weeds

Sida acuta

Characteristics of Weeds

Weeds have the following characteristics:

1. Weeds produce many seeds.
2. They can survive in adverse soil condition.
3. They grow very fast.
4. They have the ability to survive adverse soil and climatic conditions.
5. The seeds can remain dormant in the soil for a long time.
6. They are easily dispersed e.g by wind, animals, etc.
7. Seeds of weeds are highly viable.
8. They are resistant to trampling.
9. They produce large quantities of pollen grains/high reproductive capacity.
10. Most weeds are wind-pollinated.

Presentation

The topic is presented step by step

Step 1:

The class teacher revises the previous topics

Step 2.

He introduces the new topic

Step 3:

The class teacher allows the pupils to give their own examples and he corrects them when the needs arise

EVALUATION

1. Define weeds
2. Name 10 common weeds and their botanical names
3. State 5 characteristics of weeds

Conclusion :

The class teacher wraps up or conclude the lesson by giving out short note to summarize the topic that he or she has just taught.

The class teacher also goes round to make sure that the notes are well copied or well written by the pupils.

He or she does the necessary corrections when and where  the needs arise.

Assignment :

Prepare for the next lesson by reading about

CLASSIFICATION OF WEEDS