Differentiate between pathogens and pests. How does an insect-pest attack the plants?

Important Questions on Improvement in Food Resources

HARD

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 15 - Improvement in Food Resources>CHAPTER EXERCISE>Q 18

Mention any two desirable agronomic characters for crop improvement. Explain how farmers get desired characters incorporated into the new varieties produced. List two condition necessary for the new varieties to be accepted.

MEDIUM

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 15 - Improvement in Food Resources>CHAPTER EXERCISE>Q 19

A farmer is advised to use manure instead of fertiliser in his fields. List any two advantages that the farmer will get if he accepts this advice. How is the use of manure particularly useful for clayey and sandy soil?

MEDIUM

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 15 - Improvement in Food Resources>CHAPTER EXERCISE>Q 20

There is a water reservoir (river) near a village. Due to insufficient rain, farmers are worried about their crops. Suggest and explain the irrigation practice that can be adapted to supply water to the entire agricultural land in the village.

MEDIUM

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 15 - Improvement in Food Resources>CHAPTER EXERCISE>Q 21

Explain composite fish culture system with examples. State the major problem associated with this system. Can fish culture be done in any type of combination? If yes, explain.

EASY

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 15 - Improvement in Food Resources>Challengers*>Q 1

Which one of the following is a micronutrient for the crop plants?

EASY

9th CBSE

IMPORTANT

All In One SCIENCE CBSE Class IX>Chapter 15 - Improvement in Food Resources>Challengers*>Q 2

Pusa Lerma is an improved variety of

EASY

9th CBSE