PROPOSED LESSON NOTE
FOR THE FIRST WEEK ENDING 16th SEPTEMBER, 2022/2023 ACADEMIC SESSION
SUBJECT: AGRIC SCIENCE
CLASS: GRADE 8
AVERAGE AGE: 12+ YEARS
GENDER: MIXED
PERIODS: 5th
PERIOD ON MONDAY, FRIDAY AND 2nd PERIOD WEDNESDAY
DURATION: 40 MINUTES
DATE: 12/09/2022
TOPIC: PROPAGATION OF
CROPS
SPECIFIC OBJECTIVES: By
the end of the lesson the students should be able to;
i.
define crop propagation;
ii.
explain propagation of crops by seed;
iii.
state the advantages and disadvantages of sexual propagation.
ENTRY BEHAVIOUR: Students
are familiar with farms, plants stems, seeds.
INSTRUCTIONAL
MATERIALS: Bean seeds, rice seeds, groundnut seeds,
cassava stem.
INTRODUCTION:
Questions
posed to the students include:
Question
1: How
do you plant a groundnut?
Expected
Answer: You dig the ground and bury it.
Question
2: Mention
other seeds that can be planted this way?
Expected
Answer: Rice, beans, corn, pepper, tomato seed etc.
DEVELOPMENT
STEP
I: MEANING OF PROPAGATION
This is method of increasing the number of crops or
plants by planting their seeds or by using the cuttings or part of their stem,
root or leaves.
STEP
II: CROP PROPAGATION BY SEED (SEXUAL)
Sexual propagation is the reproduction of plants by
seeds. The genetic
Material of two parents is combined by pollination
and fertilization to create offspring that are different from each parent. It
involves the planting of crops by the use of their seeds. This is often known
as sowing.
Question
3: Mention
some crops propagated by the use of seeds.
Expected
Answers: Maize, tomato, pepper, oranges, pawpaw, cashew,
okro, tete, ewedu, soko.
Teacher: It follows that seed that are sexually
propagated usually grow to be different from the parents both in height and
size.
STEP
III: ADVANTAGES OF PROPAGATION BY SEED (SEXUAL)
(i) Seeds are easy to carry from place to place.
(ii) Seeds are also easy to sow, more so as they can
be drilled into the soil with seed drills or planters.
(iii) They also store well after they have been
dried to reduce their moisture content. They must however, not be too dry so
that they are viable. Since there are farmers who specialize in the growing of
seeds for sale to other farmers i.e. Seed Growers, improved crop seeds are
readily available from the National Seed Service (NSS), State Ministries of
Agriculture and Private Seed Growers.
Question
4: Why
do you need to store your asexually propagated seed?
Expected
Answers: To reduce the moisture contents.
DISADVANTAGES
OF PROPAGATION OF CROPS BY SEED
(i) Crops that are sown from seed never grow up to
look exactly alike.
(ii) Some of the plant from the seeds planted will
be short, medium or tall depending on the characteristics of their parents or
grand parents.
STEP IV: Use of teaching aids
Beans, rice , corn seed shown to the students as
sexually propagated seed. Cassava stem, Mango leaves shown to the students as
asexually propagated plants.
SUMMARY
(a)
Propagation is method of increasing the number of crops or plants by planting
their seeds or by using the cuttings or part of their stem, root or leaves.
(b) Sexual
propagation is the reproduction of plants by seeds.
EVALUATION: Oral-questioning and answers
i.
define crop propagation;
ii.
explain propagation of crops by seed;
iii.
state the advantages and disadvantages of sexual propagation.
ASSIGNMENT: What difference do you notice on a maize farm which was propagated by seed?
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