NCERT Solutions for Class 9 Science Chapter 15
NCERT Solutions for Class 9 Science Chapter 15 Improvement in Food Resources in PDF form free to download for academic session 2021-22. 9th Science chapter 15 question answers of intext on Page 204 & 205 or Page 206 & 207 or Page 208 & 209 or Page 210 & 211 or Page 213 or Exercises in English Medium. Answers of intext questions given on पेज 229 के उत्तर or पेज 230 के उत्तर or पेज 231 के उत्तर or पेज 232 के उत्तर or पेज 235 के उत्तर or पेज 236 के उत्तर or पेज 237 के उत्तर or पेज 238 के उत्तर or पेज 239 के उत्तर or पेज 240 के उत्तर or अभ्यास के प्रश्न उत्तर in Hindi Medium to study online or download in PDF file format.NCERT Solutions Apps 2021-22 based on Updated NCERT Book Solutions 2021-2022 for class 9 all subjects are also available.
NCERT Solutions for Class 9 Science Chapter 15
|Subject:||Science – विज्ञान|
|Chapter 15:||Improvement in Food Resources|
9th Science Chapter 15 Answers in English & Hindi Medium
CBSE NCERT Solutions for Class 9 Science Chapter 15 Improvement in Food Resources Intext Question answers and chapter end exercises question answers are given below in PDF form as well as to study online. Visit to Discussion Forum to ask your doubts and share your knowledge. All the NCERT Solutions 2021-22 are updated according to latest NCERT Books 2021-2022.
Class 9 Science Chapter 15 Answers English Medium
Class 9 Science Chapter 15 Answers Hindi Medium
- 9th Science पेज 229 के प्रश्न उत्तर
- 9th Science पेज 230 के प्रश्न उत्तर
- 9th Science पेज 231 के प्रश्न उत्तर
- 9th Science पेज 232 के प्रश्न उत्तर
- 9th Science पेज 235-A के प्रश्न उत्तर
- 9th Science पेज 235-B के प्रश्न उत्तर
- 9th Science पेज 236 के प्रश्न उत्तर
- 9th Science पेज 237 के प्रश्न उत्तर
- 9th Science पेज 238 के प्रश्न उत्तर
- 9th Science पेज 239 के प्रश्न उत्तर
- 9th Science पेज 240 के प्रश्न उत्तर
- 9th Science Chapter 15 अभ्यास के प्रश्न उत्तर
Class 9 Science Chapter 15 Answers in PDF
- Download 9th Science Page 204-205 Answers
- Download 9th Science Page 206-207 Answers
- Download 9th Science Page 208-209 Answers
- Download 9th Science Page 210-211 Answers
- Download 9th Science Page 213 Answers
- 9th Science Chapter 15 Exercise Answers
- 9th Science Chapter 15 Study Material for 2021-22 in English
- 9th Science Chapter 15 Study Material for 2021-22 in Hindi
- Class 9 Science Solutions Main Page
Class 9 Science Chapter 15 Solutions Related Pages
Explain any one method of crop production which ensures high yield.
Hybridisation helps to increase the crop production. It involves crossing of inter-variety, inter-specific crossing, inter-generic crossing which give plants of desired characteristics, i.e., high yield of crops which are disease resistant and respond to fertilisers positively, adaptable to the environment, need less water for irrigation and have low maturity periods.
Pasturage is the availability of flowers for nectar and pollen collection for honeybee.
The kind and quality of honey is determined by the kind and quality of pasturage.
Why should preventive measures and biological control method be preferred for protecting crops?
Resistant crops variety are useful and give higher yield. Biological control methods are safe, ecofriendly, long lasting and harmless to other forms of life, therefore should be preferred.
What is genetic manipulation? How is it useful in agricultural practices?
The process refers to the transfer of genes from one organism to another, e.g. Bt Cotton is a genetically modified crop which carry bacterial genes, that protects this plant from insects. These are used in rice, maize, brinjal, cabbage, cauliflower to get protection from insects.
What are the advantages of inter-cropping and crop-rotation?
(i) Prevents pests and decreases the chances of spoiling of whole crops, therefore reduce losses and both crops can give better results.
(ii) It can also deal with less monsoon or drought because crop which needs less water can easily survive.
(i) Farmers can grow two or three crops in a year.
(ii) Pulses take nitrogen directly from the atmosphere, and thus needed fewer amounts of fertilisers.
(iii) Vegetables and fruits can be easily grown. It makes best use of land and nutrients present in the soil.
Why are manure and fertilizers used in fields?
Manure and fertilizers supply nutrients to the soil and increases the fertility of the soil and thus increases the production. They overcome the nutritional deficiency of the soil.
Questions for Practice on 9th Science Chapter 15
What are the differences between broilers and layers and in their management?
(i) They are maintained for getting meat.
(ii) They are raised up to 6-7 weeks.
(iii) They need less space and in this condition they grow fast and have low morality.
(iv) They need food rich in proteins, adequate fat along with vitamin A and K.
(i) They are needed for eggs.
(ii) They start laying egg after 20 weeks.
(iii) They need enough space, suitable temperature and high morality.
(iv) They need restricted food with vitamins, minerals and micro-nutrients.
If there is low rainfall in a village throughout the year, what measures will you suggest to the farmers for better cropping?
(i) Use nearby rivers directly, if available .
(ii) Use canals if available and river lift system if flow of water is slow.
(iii) Use tube wells, if possible.
(iv) Use tanks and pounds which can store rain-water.
(v) Reduce tilting. Enrich the soil with humus.
(vi) Use of drought resistant variety of corps.