Advertisements
Advertisements
प्रश्न
Give reasons for the following:
Nitrogenous fertilizers are not applied in fields where leguminous crops grow.
Advertisements
उत्तर
Leguminous plants contain Rhizobium bacteria in their root nodules which can convert atmospheric nitrogen to nitrates and replenish the soil. So, nitrogenous fertilizers are not applied in the field.
APPEARS IN
संबंधित प्रश्न
Name the bioactive molecules produced by Trichoderma polysporum and Monascus purpureus.
Given below is a list of six micro-organisms. State their usefulness to humans.
- Nucleopolyhedrovirus
- Saccharomyces cerevisiae
- Monascus purpureus
- Trichoderma polysporum
- Penicillium notatum
- Propionibacterium sharmanii
Mention one advantage and one disadvantage to a farmer who uses them.
State the difference in organic farmers approach from that of conventional pest control methods.
Why are the spores of Bacillus thuringiensis used as bioinsecticide?
Match the items in Column ‘A’ and Column ‘B’ and choose correct answer.
| Column I | Column II |
| A. Lady bird | i. Methano bacterium |
| B. Mycorrhiza | ii. Trichoderma |
| C. Biological control | iii. Aphids |
| D. Biogas | iv. Glomus |
The correct answer is:
Protozoan like Nosema locustae is used for controlling the target pests like ______.
What is the mechanism by which Bacillus thuringiensis (Bt) kills insect larvae?
What is the primary reason biocontrol is needed according to the material?
What is the relationship between biopesticides and chemical pesticides in terms of safety?
