Class 9 NCERT Solutions Improvement in Food Resources

Class 9 NCERT Solutions Improvement in Food Resources with answers available in Pdf for free download. The NCERT Solutions for Class 9 Science with answers have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Standard 9 by CBSE, NCERT and KVS. Solutions to questions given in NCERT book for Class 9 Science are an important part of exams for Grade 9 Science and if practiced properly can help you to get higher marks. Refer to more Chapter-wise Solutions for NCERT Class 9 Science and also download more latest study material for all subjects

Improvement in Food Resources Class 9 NCERT Solutions

Class 9 Science students should refer to the following NCERT questions with answers for Improvement in Food Resources in standard 9. These NCERT Solutions with answers for Grade 9 Science will come in exams and help you to score good marks

Improvement in Food Resources NCERT Solutions Class 9

Class 9 NCERT Solutions Improvement in Food Resources - NCERT Solutions prepared for CBSE students by the best teachers in Delhi. 

Class IX Science

Chapter 15 – Improvement in Food Resources 

Question 1:

How do biotic and abiotic factors affect crop production?

Answer:

A variety of biotic factors such as pests, nematodes, diseases, etc. can reduce the net crop production. A pest causes damage to agriculture by feeding on crops. For example, boll weevil is a pest on cotton. It attacks the cotton crop, thereby reducing its yield. Weeds also reduce crop productivity by competing with the main crop for nutrients, light, and space.

Similarly, abiotic factors such as salinity, temperature, etc. affect the net crop production. Some natural calamities such as droughts and floods are unpredictable. Their occurrence has a great impact on crops sometimes, destroying the entire crop.

 

Question 2:

What are the desirable agronomic characteristics for crop improvements?

Answer:

The desirable agronomic characteristics for crop improvements are:

(i) Tallness and profuse branching in any fodder crop.

(ii) Dwarfness in cereals.

These desirable agronomic characteristics help in increasing crop productivity.

Question 3:

What are macro-nutrients and why are they called macro-nutrients?

Answer:

Macro-nutrientsare nutrients required in relatively large quantities for growth and development of plants. They are six in number. Since they are required in large quantities, they are known as macro-nutrient. The six macro-nutrients required by plants are nitrogen, phosphorus, potassium, calcium, magnesium, and sulphur.

 

Question 4:

How do plants get nutrients?

Answer:

Plants require sixteen essential nutrients from nature for their growth and development. All these nutrients are obtained from air, water, and soil. Soil is the major source of nutrients. Thirteen of these nutrients are available from soil. The remaining three nutrients (carbon, oxygen, and hydrogen) are obtained from air and water.

 

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Chapter 1 Matter In Our Surroundings
Class 9 NCERT Solutions Matter in Our Surroundings
Chapter 2 Is Matter Around Us Pure?
Class 9 NCERT Solutions Is Matter Around Us Pure
Chapter 3 Atoms and Molecules
Class 9 NCERT Solutions Atoms and Molecules
Chapter 4 Structure Of The Atom
Class 9 NCERT Solutions Structure of the Atom
Chapter 5 The Fundamental Unit Of Life
Class 9 NCERT Solutions The Fundamental Unit of Life
Chapter 6 Tissues
Class 9 NCERT Solutions Tissues
Chapter 7 Diversity In Living Organisms
Class 9 NCERT Solutions Diversity in Living Organisms
Chapter 8 Motion
Class 9 NCERT Solutions Motion
Chapter 9 Force and Laws Of Motion
Class 9 NCERT Solutions Force and Laws of Motion
Chapter 10 Gravitation
Class 9 NCERT Solutions Gravitation
Chapter 11 Work and Energy
Class 9 NCERT Solutions Work and Energy
Chapter 12 Sound
Class 9 NCERT Solutions Sound
Chapter 13 Why Do We Fall Ill?
Class 9 NCERT Solutions Why Do We Fall Ill
Chapter 14 Natural Resources
Class 9 NCERT Solutions Natural Resources
Chapter 15 Improvement In Food Resources
Class 9 NCERT Solutions Improvement in Food Resources

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