Page 40 - SCERT Kerala State Syllabus 8th Standard Basic Science Textbooks English Medium Part 1_Neat

What are the consequences of unscientific application of chemical
fertilizers? Discuss on the basis of the following indicators.

• composition of soil
• microorganisms in soil
• health issues

• financial factors
Organise an exhibition for creating awareness among farmers.

To control pests
Isn’t pest infestation yet another important
problem faced by our farmers? People
generally apply chemical pesticides to
overcome this.

Chemical pesticides destroy pests
totally. But when the pests acquire
resistance, the quantity of pesticides has
to be increased.
Excessive application of chemical
pesticides causes many environmental
and health issues.

Now read this newspaper report.

Cancer patient toll on the
rise.
Thiruvananthapuram :The wide use of
chemical pesticides is suspected to be an
important reason for the increase in the
number of cancer affected persons. The
presence of pesticides identified in even
ground water has become a matter of great
concern.

In this situation, isn’t it important to adopt pest control
measures that are not harmful to our health and nature?

Basic Science VIII 39