Classification of Crops according to life span
Subject :
AGRICULTURAL SCIENCE
Term :
1ST TERM
Week:
WEEK 6
Class :
Primary 5
Topic :
Classification according to life span
Previous lesson :
The pupils have previous knowledge of
Classification of crops and their uses Classification according to forms
that was taught as a topic in the previous lesson
Behavioural objectives :
At the end of the lesson, the pupils should be able to
- Define life span
- Explain the meaning of annual, biannual and perennial
- Classify crops based on their lifespan
Instructional Materials:
- Wall charts
- Pictures
- Related Online Video
- Flash Cards
Methods of Teaching:
- Class Discussion
- Group Discussion
- Asking Questions
- Explanation
- Role Modelling
- Role Delegation
Reference Materials:
- Scheme of Work
- Online Information
- Textbooks
- Workbooks
- 9 Year Basic Education Curriculum
- Workbooks
Content:
Classification according to Lifespan
Lifespan refers to the number of years a crop is able to life or survive before death.
Crops can be grouped according to their life span as follows: annuals, biennials and perennials.
Annuals
These are plants that perform their entire life cycle from seed to flower to seed within a single growing season. They are crops which grow and mature within one year . All roots, stems and leaves of the plant die annually. Examples are lettuce, spinach, melon, maize, rice, wheat, groundnut, cowpea, cotton
Annual crops are crops that grow and live for about one year. Many vegetables belong to this group. Examples include tomato, Amaranthus, okra, onion and carrot. Other crops in this group are yam, maize, rice, groundnut, millet, garden egg, sorghum, cassava and potato.
Biennials
These are plants which require two years to complete their life cycle. They are crops which grow and mature within two years. Examples are onions, cassava, pepper, ginger, carrots, and cabbage
Biennial crops are crops that live for two years after germination and produce seeds or fruits in the second year. Examples are castor oil, pepper, alligator pepper, plantain, banana, sugarcane, pineapple and pawpaw.
Perennials
These are crops that persist for many growing seasons.
They are those crops that grow and mature in more than two years.
Examples are cashew trees, palm trees, and banana trees.
Perennial crops are plants or crops that live and produce for more than two years after germination.
There are two types of perennial crops
Woody perennials that live for 3-10years e.g. paw-paw
Herbaceous Perennials that live 30-80 years e.g. Cocoa, oil palm, mango, orange, rubber etc.
Examples of such crops are oil palm, cocoa, mango, citrus, guava and kola.
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
Conclusion
The class teacher wraps up or concludes the lesson by giving out short notes 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.
Evaluation
Objectives Part A
- Plants that complete their life span within one year are called _______ plants (a) annual (b) biennial (c) perennial
- Plants that complete their life span within two years are called _______ plants (a) annual (b) biennial (c) perennial
- Plants that complete their life span within two or more years are called _______ plants (a) annual (b) biennial (c) perennial
- Palm, cocoa, mango, citrus, guava and kola are examples of ________ crops. (a) annual (b) biennial (c) perennial
- Cashew trees, palm trees, and banana trees are examples of _______ crops. (a) annual (b) biennial (c) perennial
- Onions, cassava, pepper, ginger, carrots, and cabbage are examples of ______ crops (a) annual (b) biennial (c) perennial
- ______ crops are crops that grow and live for about one year. (a) annual (b) biennial (c) perennial
- Maize is an example of _____ crop. (a) annual (b) biennial (c) perennial
Theory Part B
- Name three ways by which we can classify crops
- What are perennial crops? Give examples
- Classify these crops according to their life span: maize, beans, water-leaf, soya beans, cassava, pepper and cocoa.
Assignment
Prepare for the next lesson by reading about
Classification of crops based on their Lifespan
