Advertisements
Advertisements
Question
Give reasons for the following:
Nitrogenous fertilizers are not applied in fields where leguminous crops grow.
Advertisements
Solution
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
RELATED QUESTIONS
State the difference in organic farmers approach from that of conventional pest control methods.
Describe the main ideas behind the biological control of pests and diseases.
A farmer grew 2 varieties of corn crops in fields A and B. He grew normal corn crops in field A and GM corn crops in field B. He observed corn borers attacked only in field A. To control it, spores of Bt were sprayed in field A.
- Name the gene in the spores responsible for the control of this pest.
- What effect will the spores of Bt have on the insect pest?
- How has field B developed resistance against this pest?
give any two examples of microbial herbicides.
Which insect biocontrol agent is specifically useful for eliminating aphids?
What is the primary advantage of using baculoviruses as biocontrol agents in integrated pest management?
Which fungal pathogen is used as a mycoherbicide to control water hyacinth?
Which insect is used as a biological herbicide to control the weed Senecio jacobeae?
Why are baculoviruses described as 'species-specific' biocontrol agents?
What is the relationship between biopesticides and chemical pesticides in terms of safety?
