Towards a just, equitable, humane and sustainable society

Food Production and Crop Management Samacheer Kalvi, Science, Class - VIII

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Role of science is to help human lead a better life with deeper understanding of the world around us. This part of the lesson focuses on how science lends a helping hand to farmers through biotechnology.


1. To   become   aware   of   the   concept biotechnology, its interdisciplinary nature and applications in the field of agriculture.

2. To understand and explain the basic concepts, tools and techniques of biotechnology.

3. To analyze its beneficial and harmful effects.

4. To become aware of the ample career options in biotechnology.


Teacher asks students to sit in groups of four. The group lists and discuss the factors threatening the  farmers  today,  solutions  to  the  problems and government schemes for the welfare of the farmers.

Some answers could be

i) demand in food for growing population

ii) plant diseases

iii) drought etc.

This could also be done as a survey by the students with the agricultural families in their vicinity.

Later   she   asks   to   present   their   ideas   and groups  the  problems  that  could  be  addressed by biotechnology and introduces the concept of biotechnology (depending on the students’ ideas) using what is biotechnology from  or video source below: 

These resources share a lot of crop related problems that can be addressed through biotechnology. These techniques are specific in improving the plant in several ways.

Techniques in hybridization

1.   Hybridized seed structure :

She shows a red rose, yellow rose and Rose with petals of both colors and explains that the third floor is a product of hybridization

2.   Polypoid breeding - strawberry :

3.   Mutation breeding - Seedless Orange

4.   Protoplast fusion -

5.   Tissue culture

- Plant tissue culture CSIR

6.   Genetic engineering 

– MIT Video

Activity 1: If you were a genetic engineer what are the changes you would like to bring in?

Activity 2: Collect the vegetables and fruits that have been hybridized/ genetically modified.

Teacher elicits the government schemes students are familiar with. She asks students to collect more information from different sources.


The teacher can organize a one day field visit to Krishi Vigyan Kendra to gain practical knowledge on the steps involved in tissue culture and other agriculture related activities.

CONCLUSION: The teacher asks students to share the information they have collected. Teacher can also give clippings and articles on genetically  modified  seeds,  vegetables,  fruits etc., from newspapers, magazines, reports etc., and create a platform to share their views on the impact of genetic engineering on human life. She also motivates students to come up with articles on biotechnology a boon or bane.The following video can also be used to help the discussion.

- Are GMOs Good or Bad? Genetic Engineering & Our Food

G. Joshy Thekla Marie

TGT, GGHS, Madukarai.


Term: Term 1

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