Students can Download Science Chapter 15 Improvement in Food Resources Questions and Answers, Notes Pdf, KSEEB Solutions for Class 9 Science helps you to revise the complete Karnataka State Board Syllabus and to clear all their doubts, score well in final exams.
Karnataka State Syllabus Class 9 Science Chapter 15 Improvement in Food Resources
KSEEB Class 9 Science Improvement in Food Resources Textbook Exercise Questions and Answers
Question 1.
What do we get from cereals? Pulses, fruits, and vegetables.
Answer :
Cereals: for carbohydrates and energy
Pulses: Proteins
Vegetables: Vitamins, minerals
Question 2.
How do biotic and abiotic factors affect crop production?
Answer :
Biotic factors like worms, insects, birds reduce the reproductive activity in terms of pollen, pollen grains, which reduces the yield abiotic factors: like wind, rain salinity heat, cold and frost affect the agronomic characters, to reduce the crop production.
Question 3.
What are the disorder agronomic characteristics for crop improvement?
Answer :
(a) Tallness and profuse branching disorder for fodder crops.
(b) dwarfness for cereals
Question 4.
What are macronutrients and why are they called macronutrients?
Answer :
Plants which require a large number of nutrients for its agronomic characters called macronutrients. The requirement of nutrients in large doses. Hence they are called macronutrients.
Question 5.
How do plants get nutrients?
Answer :
By the assimilation, through the soil, water and air by means of conduction. the ascent of soap. depending upon the plant variety.
Question 6.
Compare the use of manure and fertilizers in maintaining soil fertilizer.
Answer :
| Manure | Fertilizer |
|
i) Manure is prepared by the decomposition of animal excreta and plant waste. |
i) Fertilizers are manufactured by chemicals such as nitrogen, phosphorus, potassium, etc. |
Question 7.
Which of the following conditions will give the most benefits? Why?
(a) Farmers use high quantity seeds, do not adopt irrigation or use of fertilizer.
(b) Formers we ordinary seed adopt irrigation and use of fertilizers.
(c) Farmers use quality seeds to adopt irrigation use fertilizers and crop protection measures.
(d) It is better to practice for high yield, maintain sterility’ of seeds and soil nutrients can be protected.
Answer :
(c) Farmers use quality seeds to adopt irrigation use fertilizers and crop protection measures.
Question 8.
Why should’ preventive measures ‘ and biological control methods to preferred for protecting crops?
Answer :
(a) to protect seeds and sterility
(b) successive healthy agricultural practices can be maintained.
(c) Soil erosion can be conserved.
(d) A food chain can be maintained and established.
Question 9.
What factors may be responsible for losses of grains during storage?
Answer :
Insects, rodents, fungi, mites, bacteria Moisture, temperature
Question 10.
Which method is commonly used for improving cattle breeds and why?
Answer :
Crossbreeding.
Question 11.
Discuss the implications of the following statement, “it is interesting to note that poultry is India’s most efficient converter of low fiber foodstuff (which is unfit for human consumption) into highly nutritious animal protein food”.
Answer :
The main aim to egg production, meat it’s by-products are cheaper, economical fibrous wastes. In order to produce high-quality meat and also help in providing egg, feathers, and nutrient-rich manure hence poultry is India’s most efficient converter of ‘low fiber food. Stuff into highly nutritious animal protein food.
Question 12.
What management practices are . common in diary and poultry farming?
Answer :
Maintenance of temperature. Hygenic conditions in housing. Prevention and control of diseases and pests.
Question 13.
What are the differences between broilers and egg layers and their management?
Answer :
Broilers:
(a) Protein-rich
(b) Adequate fat
(c) High level of vitamin A and K Egg layers:
(a) Maintenance cost is high
(b) Supplement of food and protein
Question 14.
How are fish obtained?
Answer :
Fishes arc obtained by the neutral process is an artificial based scientific approach and suitable habitual condition.
Question 15.
What are the advantages of composite fish culture?
Answer :
(a) Easy to produce different races.
(b) Establishing a suitable and favorable ecosystem.
(e) Population-of the different races of the ineffective food chain.
(d) The economy index of the country is established.
Question 16.
What are the desirable characters of bee varieties suitable for honey production?
Answer :
- Apis cerana Indica (Indian bee) A
- Rock bee → Capacity to breed.
- Little bee
- Stallion bee → Variety of sec and disease resistant
- Mellif’era
Question 17.
What is pasturage and how is it related to honey production?
Answer :
The value of the quality of honey depends upon the pasturage or the available flowers, the adequate quantity of pasturage the kind of flowers will determine the taste of honey.
KSEEB Class 9 Science Improvement in Food Resources Textbook Exercise Questions and Answers
Question 1.
Explain any one method of crop production which ensures high yield.
Answer :
(a) Higher yield
(b) improved quality
(c) Biotic and abiotic resistant
(d) Change in maturity
(e) Wider adaptability
(f) Desirable agronomic characteristics
Wider adaptability: It stabilizes the crop production under different environmental conditions one variety can then be grown under different climate conditions in different areas.
Question 2.
Why are manure and fertilizers used in fields?
Answer :
Manure : Provide suitable conditions for crop reduces the soil erosion and soil pollution can be controlled for leaf roots by means of potassium and phosphorous.
Fertilizers : Desirable nutrients supplied to the soil and crop to produce and help. –
Question 3.
What are the advantages of inter-cropping and crop rotation?
Answer :
Intercropping :
(a) Conserve nutrients of the soil.
(b) Weeds can be controlled.
Crop rotation :
(a) pH and nutrients of the soil can be conserved.
(b) Soil erosion can be controlled.
Question 4.
What is genetic manipulation? Flow is it useful in agricultural practices?
Answer :
Developing varieties of desired agronomic characters help give higher productivity. Less nutrients are consumed by these crops.
Question 5.
How do storage grain losses occur?
Answer :
(a) Rodents
(b) Pests
(c) Moisture
(d) Fungicides
(e) Discolurisation due to temperature.
Question 6.
How do good animal husbandry practices benefit farmers?
Answer :
(a) Growth and yield can be established.
(b) Technology provides suitable species for agricultural practices.
Question 7.
What are the benefits of cattle farming?
Answer :
Livestock can be maintained
(a) Fertility of the soil can be maintained.
(b) Soil erosion can be controlled by the required depth of plowing.
Question 8.
For increasing production, what is common in poultry, fisheries, and bee-keeping?
Answer :
Management of resources. Commercial practices food requirements at economical prices.
Question 9.
How do you differentiate between capture fishing, Marie culture, and aquaculture?
Answer :
Capture fishing: Fishes obtained by natural resources.
Marie culture fishing: demand is more obtained from marine resources;
Aquaculture: Fishes obtained from inland water bodies.
KSEEB Class 9 Science Improvement in Food Resources Additional Questions and Answers
Question 1.
Name two Kharif and Rabi crops.
Answer :
Kharif crops: Paddy, Soyabean
Rabi crops: Wheat and gram
Question 2.
What are genetically modified crops?
Answer :
By introducing gene with required characters into a crop for its improvement.
Question 3.
Who provides nutrients to plants?
Answer :
Air, Water, and soil
Question 4.
Name two weeds.
Answer :
Parthenium and Xanthyium
Question 5.
Name two Indian cattle.
Answer :
Bos indicus – Cows
Bos bubalis – buffaloes.
Question 6.
Name two marine fish varieties.
Answer :
Tuna, mackerel.
Question 7.
Name the two products from apiculture.
Answer :
Honey and wax.
Question 8.
Define mixed cropping.
Answer :
It is a method in which two or more crops grow simultaneously on the same piece of land.
Question 9.
What is the most (a common pesticide used in our country?
Answer :
DDT (Dichloro Diphenyl Trichloro Ethane)
Question 10.
What are the practices used for . dairy industry?
Answer :
Shelter, feeding, rearing of animals, and breeding.