Home
Class 12
BIOLOGY
Farmers in a particlular region were con...

Farmers in a particlular region were concerned that pre mature yellowing of leaves of a pulses crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

A

Frequent irrigation of the crop

B

Treatment of the plants with cytokinin alongwith a small dose of nitrogen fertilizer

C

Removal of all yellow leaves and spray the remaining green leaves with 2,5-trichlorophenoxy acetic acid

D

Application or iron and magnesium promote synthesis of chlorophyll

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

    MODERN PUBLICATION|Exercise COMPETITION FILE (MATCHING TYPE QUESTIONS:)|3 Videos
  • STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

    MODERN PUBLICATION|Exercise COMPETITION FILE (ASSERTION REASON TYPE QUESTIONS:)|11 Videos
  • STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

    MODERN PUBLICATION|Exercise REVISION EXERCISES (QUESTIONS FROM CBSE BOARD EXAMINATIONS)|5 Videos
  • SEXUAL REPRODUCTION IN FLOWERING PLANTS

    MODERN PUBLICATION|Exercise Competition File (Assertion & Reasons Type Questions)|19 Videos

Similar Questions

Explore conceptually related problems

Farmers in aparticlular region were concerned that pre mature yellowing of leaves of a pluser crop might cause decrease in the yield. Which treatment could be most benefical to obtain maximum seed yield?

Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might caused decrease in the yield. Which treatment could be most be most beneficial to obtain maximum seed yield?

Farmers in a particular region were concerned that premature yellowing of leaves of a pulse crop might cuuse dectease in the yild .Which treatment could be most benefical top obtain maxmum seed yield

First read a passage and then answer the questions following that passage. Soil scientists have shown that the soil teems with millions of living things, many of them useful, others harmful. The living things which are useful include earthworms and various kinds of bacteria. Earthworms loosen the soil and so enable air and water to enter it. Bacteria, which are microscopic living things break down dead plants and animals and make humus, or take nitrogen from the air and change it into substances that plants use. The living things that do harm include other bacteria and fungi which cause diseases. Other harmful things are pests such as wire worms which feed on the roots of grass and other plants. While the farmer can usually keep weeds in check by careful cultivation, this alone may not protect his crops from insects, pests and diseases. Nowadays, however, he is much better able to control these enemies. He may plant. specially resistant types of seeds or he may keep the pests and diseases in check with chemicals. With better seeds farmers have been able to increase their crop yield . They can grow crops that ripen more quickly and have a stronger resistance to disease, frost or drought. The farmers today can also select seeds

First read a passage and then answer the questions following that passage. Soil scientists have shown that the soil teems with millions of living things, many of them useful, others harmful. The living things which are useful include earthworms and various kinds of bacteria. Earthworms loosen the soil and so enable air and water to enter it. Bacteria, which are microscopic living things break down dead plants and animals and make humus, or take nitrogen from the air and change it into substances that plants use. The living things that do harm include other bacteria and fungi which cause diseases. Other harmful things are pests such as wire worms which feed on the roots of grass and other plants. While the farmer can usually keep weeds in check by careful cultivation, this alone may not protect his crops from insects, pests and diseases. Nowadays, however, he is much better able to control these enemies. He may plant. specially resistant types of seeds or he may keep the pests and diseases in check with chemicals. With better seeds farmers have been able to increase their crop yield . They can grow crops that ripen more quickly and have a stronger resistance to disease, frost or drought. Farmers are always careful

First read a passage and then answer the questions following that passage. Soil scientists have shown that the soil teems with millions of living things, many of them useful, others harmful. The living things which are useful include earthworms and various kinds of bacteria. Earthworms loosen the soil and so enable air and water to enter it. Bacteria, which are microscopic living things break down dead plants and animals and make humus, or take nitrogen from the air and change it into substances that plants use. The living things that do harm include other bacteria and fungi which cause diseases. Other harmful things are pests such as wire worms which feed on the roots of grass and other plants. While the farmer can usually keep weeds in check by careful cultivation, this alone may not protect his crops from insects, pests and diseases. Nowadays, however, he is much better able to control these enemies. He may plant. specially resistant types of seeds or he may keep the pests and diseases in check with chemicals. With better seeds farmers have been able to increase their crop yield . They can grow crops that ripen more quickly and have a stronger resistance to disease, frost or drought. Nowadays it is possible to reduce the loss caused by pests and harmful bacteria

First read a passage and then answer the questions following that passage. Soil scientists have shown that the soil teems with millions of living things, many of them useful, others harmful. The living things which are useful include earthworms and various kinds of bacteria. Earthworms loosen the soil and so enable air and water to enter it. Bacteria, which are microscopic living things break down dead plants and animals and make humus, or take nitrogen from the air and change it into substances that plants use. The living things that do harm include other bacteria and fungi which cause diseases. Other harmful things are pests such as wire worms which feed on the roots of grass and other plants. While the farmer can usually keep weeds in check by careful cultivation, this alone may not protect his crops from insects, pests and diseases. Nowadays, however, he is much better able to control these enemies. He may plant. specially resistant types of seeds or he may keep the pests and diseases in check with chemicals. With better seeds farmers have been able to increase their crop yield . They can grow crops that ripen more quickly and have a stronger resistance to disease, frost or drought. Scientists who study soil believe that

First read a passage and then answer the questions following that passage. Soil scientists have shown that the soil teems with millions of living things, many of them useful, others harmful. The living things which are useful include earthworms and various kinds of bacteria. Earthworms loosen the soil and so enable air and water to enter it. Bacteria, which are microscopic living things break down dead plants and animals and make humus, or take nitrogen from the air and change it into substances that plants use. The living things that do harm include other bacteria and fungi which cause diseases. Other harmful things are pests such as wire worms which feed on the roots of grass and other plants. While the farmer can usually keep weeds in check by careful cultivation, this alone may not protect his crops from insects, pests and diseases. Nowadays, however, he is much better able to control these enemies. He may plant. specially resistant types of seeds or he may keep the pests and diseases in check with chemicals. With better seeds farmers have been able to increase their crop yield . They can grow crops that ripen more quickly and have a stronger resistance to disease, frost or drought. The living things that do harm

MODERN PUBLICATION-STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION-COMPETITION FILE (OBJECTIVE TYPE QUESTIONS)
  1. The new varieties of plants are produced by

    Text Solution

    |

  2. Blindness prevented by use of which crop in poor country?

    Text Solution

    |

  3. Farmers in a particlular region were concerned that pre mature yellowi...

    Text Solution

    |

  4. Which is linked to discovery of Bordeaux mixture as fungicide ?

    Text Solution

    |

  5. A transgenic food crop which may help in solving the problem of night...

    Text Solution

    |

  6. Trichoderma-harzianum has proved a useful microorganism for :

    Text Solution

    |

  7. Which proves to be effective biological control for nematodal pathogen...

    Text Solution

    |

  8. Which is correctly matched?

    Text Solution

    |

  9. Name on disease of mulbery silkworm caused by a protozoan:

    Text Solution

    |

  10. The bacterium Bacillus thuringiensis is widely used in contemporary bi...

    Text Solution

    |

  11. निम्न में से कौन एक जैव-कीटनाशक के रूप में प्रयुक्त नहीं होता है

    Text Solution

    |

  12. Which of the following is correctly matched?

    Text Solution

    |

  13. Wonder wheat is a new wheat variety developed by

    Text Solution

    |

  14. Heating of milk of ant other liquid at 63^(@) C and sudden cooling is ...

    Text Solution

    |

  15. Embryo developed from the somatic cells are called

    Text Solution

    |

  16. The most commenly maintained species of bee by bee keepers is

    Text Solution

    |

  17. Who was first to develop artificial skin by tissue culture?

    Text Solution

    |

  18. "Jaya" and "Ratna" developed for green revolution in India are the var...

    Text Solution

    |

  19. Himgiri developed by hybridization and selection for disease resistanc...

    Text Solution

    |

  20. When two unrelated individuals or lines are crossed, the performance o...

    Text Solution

    |