Subject : Agricultural Science






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 :




  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

S/N Names of Common Weeds Botanical Names
1. Guinea grass Panicum maximum
2. Bahama grass Cynodon dactylon
3. Carpet grass Axonopus compressus
4. Elephant grass Pennisetum purpureum
5. Spear grass Imperata cylindrical
6. Giant star grass Cynodon plactostachyum
7. Northern gamba Andropogon gayanus
8. Stubborn grass Eleusine indica
9. Southern gamba Andropogon tectorum
10. Aspilia Africana African marigold
11. Centro Centrosema pubescens
12. Calopo Calopogonium mucunoides
13. Kuzu or puero Pueraria phaseoloides
14. Stylo Stylosanthes gracilis
15. Sun hemp Crotolaria juncea
16. Mucuna Mucuna utilis
17. Goat weed Ageratum conyzoides
18. Stubborn weed Arctium minus
19. Sensitive plant Mimosa pudica
20. Blue feather Commelina nudiflora
21. Pig weed Amaranthus spp
22. Bush green Amaranthus spinosus
23. Water leaf Talinum triangulare
24. Sedge plant Cyperus rotundus
25. Tridax, PWD weed Tridax procumbens


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.






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




  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