Advertisements
Advertisements
Question
Explain various effects of weeds on crop plants.
Advertisements
Solution
Weeds affect the growth of crop plants in the following ways:
- They compete with the crop plant for nutrients, water, space, and light, depriving the crop plants of essential nutrients.
- They spread crop pests by acting as hosts to insects and other microorganisms.
- Some produce toxic substances that harm the growth of crop plants.
- Some weeds get mixed up with crops during harvesting and lead to poor quality of crop production.
APPEARS IN
RELATED QUESTIONS
Why are manures and fertilizers used in fields?
Compare the use of manures and fertilizers in maintaining soil fertility.
Explain the term eutrophication with suitable example
Mention three effects of excessive irrigation.
Why water should be used judiciously ?
Define intercropping. How does it differ with mixed cropping?
Write about three main criteria which should be considered while selecting the crops for rotation?
Give two examples each of
(a) Narrow leaved rabi season weed.
(b) Broad leaved kharif season weed.
What is the advantage of using insect resistant varieties?
Distinguish between fertilizer and manure. Give suitable examples. What are advantages and disadvantages of using fertilizer?
