EASY
9th CBSE
IMPORTANT
Earn 100

Define manure. What are different manures and how do they affect the soil?

Important Questions on Improvements in Food Resources

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class (Part-3) Biology>Chapter 1 - Improvements in Food Resources>REVISION QUESTIONS>Q 16
What is green manuring? Give suitable examples of green manures.
EASY
9th CBSE
IMPORTANT
Science for Ninth Class (Part-3) Biology>Chapter 1 - Improvements in Food Resources>REVISION QUESTIONS>Q 17
What are fertilizers? Classify fertilizers.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class (Part-3) Biology>Chapter 1 - Improvements in Food Resources>REVISION QUESTIONS>Q 18

Give a short account of biofertilizers.

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class (Part-3) Biology>Chapter 1 - Improvements in Food Resources>REVISION QUESTIONS>Q 19
Explain why a legume crop does not require nitrogenous fertilizers?
EASY
9th CBSE
IMPORTANT
Science for Ninth Class (Part-3) Biology>Chapter 1 - Improvements in Food Resources>REVISION QUESTIONS>Q 20
Why is irrigation essential?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class (Part-3) Biology>Chapter 1 - Improvements in Food Resources>REVISION QUESTIONS>Q 21
How does excessive irrigation lead to soil salinity?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class (Part-3) Biology>Chapter 1 - Improvements in Food Resources>REVISION QUESTIONS>Q 22
Mention three effects of excessive irrigation.
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class (Part-3) Biology>Chapter 1 - Improvements in Food Resources>REVISION QUESTIONS>Q 23
Why water should be used judiciously?