Home
Class 9
BIOLOGY
Discuss why the pesticides are used in v...

Discuss why the pesticides are used in very accurate concentration and at very appropriate time.

Text Solution

Verified by Experts

If pesticides are used in excess concentrations, they will
(i) harm the soil fertility as organic matter is not replenished.
(ii) kill the useful soil microorganisms.
(iii) cause environmental (air, water and soil) pollution.
Promotional Banner

Topper's Solved these Questions

  • IMPROVEMENT IN FOOD RESOURCES

    PRADEEP|Exercise Very Short Answer Questions|34 Videos

  • IMPROVEMENT IN FOOD RESOURCES

    PRADEEP|Exercise Short Answer Questions|41 Videos

  • IMPROVEMENT IN FOOD RESOURCES

    PRADEEP|Exercise Exercises|9 Videos

  • HEALTH AND DISEASES

    PRADEEP|Exercise Analytical|12 Videos

  • NATURAL RESOURCES : OUR ENVIRONMENT

    PRADEEP|Exercise QUESTIONS WITH ANSWERS|20 Videos

Similar Questions

Explore conceptually related problems

Discuss why esticides are used in very accurate concentration and in very appropritate manner?

Why halogens are very reactive?

Why is nitrogen gas very unreactive ?

Which instrument was used to detect gravitational waves for the very first time?

PRADEEP-IMPROVEMENT IN FOOD RESOURCES -MCQ
  1. Group the following and tabulate them as energy yielding protein yield...

    Text Solution

    |

  2. Define the term hybridisation and photoperiod.

    Text Solution

    |

  3. Fill in the blanks (a) Photoperiod affect the "" (b) Kharif crops...

    Text Solution

    |

  4. Cultivation practices and crop yield are related to environmental cond...

    Text Solution

    |

  5. Fill in the blanks (a) A total of "" nutrients are essential to pla...

    Text Solution

    |

  6. Differentiate between compost and vermicompost?

    Text Solution

    |

  7. Arrange these statements in corrent sequence of preparation of green ...

    Text Solution

    |

  8. In agricultural practices, higher input gives higher yield. Discuss ho...

    Text Solution

    |

  9. Discuss the role of hydridisation in crop improvement.

    Text Solution

    |

  10. Discuss various methods for weed control.

    Text Solution

    |

  11. Give the merits and demerits of fish culture?

    Text Solution

    |

  12. What do you understand by compositie fish culture?

    Text Solution

    |

  13. Why bee keeping should be done in good pasturage?

    Text Solution

    |

  14. Write the modes by which insects affect the crop yield.

    Text Solution

    |

  15. Discuss why the pesticides are used in very accurate concentration and...

    Text Solution

    |

  16. Name two types of animal feed and write their functions.

    Text Solution

    |

  17. What would happen if poultry birds are larger in size and have no summ...

    Text Solution

    |

  18. Suggest some preventive measures for the diseases of poultry birds.

    Text Solution

    |

  19. The figure shows two crop fields (plots A and B) have been treated by ...

    Text Solution

    |

  20. Complete the crossword puzzle (Fig.) Across 1. Oil yielding p...

    Text Solution

    |