Date:13th-17th of February 2022
Class: JSS 1
Term: 2nd Term
Subject: Agricultural Science
Teaching Aid: A chart
Reference Book: WABP Junior secondary Agriculture for Nigerian School 1 by Anthony Youdeowei et al
Behavioural Objectives: By the end of this topic, students should be able to
Step 1: Teacher revises last topic
Step 2: Teacher introduces and explains new topic
Step 3: Teacher writes note on the board
Step 4: Teacher evaluates students
Step 5: Teacher marks students' notes and give assignment
Previous knowledge: Students have been taught plant forms
A weed is a plant that grows in a place where it is not wanted e.g. a vegetable plant growing on a cassava plot is a weed.
CHARACTERISTICS OF WEEDS
CLASSIFICATION OF WEEDS BASED ON LIFE CYCLE
Weeds are grouped in three classes. These include
(i) Annual weed (ii) Biennial weed (iii) Perennial Weed
These are weeds which complete their life cycle in one year. They grow, reach maturity and die within a year. Annual weeds include fridax plant, goat weed, spigelia and so on.
These are weeds that complete their life cycle in two years. The first year is used by the crops to grow and store food. Reproduction and maturity take place in the second year. Example of biennial weeds are wild carrot, yellow rocket.
These are weeds that take more than two years to complete their lifecycle or ripe for harvesting perennial weeds include giant star grass, guinea grass, carpet grass, centxo and tropical kudzu.
COMMON NAME�������������������������� BOTANICAL NAME
Evaluation: Mention some weed characteristics
Assignment: Mention five other weeds with their botanical names
� Lesson Notes All Rights Reserved 2023