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CBSE Class 9 Biology Chapter 12 Improvement in Food Resources Worksheet with Answers

Improvement in Food Resources is a high-weightage chapter in CBSE Class 9 Biology, often carrying 4–6 marks in board exams. The chapter introduces scientific agriculture—crop varieties, irrigation, soil health, pest management—and animal husbandry covering cattle, poultry, and fish farming. This printable worksheet offers structured practice across all question types seen in CBSE papers, complete with a detailed answer key.

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Key takeaways

✓Complete worksheet covering all topics in NCERT Class 9 Biology Chapter 12 Improvement in Food Resources with difficulty level: Moderate, time: 60–75 minutes.
✓Section A has 6 MCQs on HYV seeds, irrigation methods, nutrient management, and animal husbandry for quick concept checks.
✓Section B tests recall with 5 fill-in-the-blanks; Section C uses match-the-following to link crop varieties, breeds, and practices.
✓Section D contains 5 short-answer questions (2–3 marks each) on Green Revolution, manure vs fertilizer, IPM, dairy farming, and poultry benefits.
✓Section E includes 3 long-answer/HOTS questions (5 marks) on crop production steps, integrated pest management rationale, and cattle management.
✓One case-study question simulates real-world farm scenarios—key for CBSE 2025 competency-based pattern.
✓Complete answer key with brief explanations ensures students understand why an answer is correct, aiding self-study and exam preparation.

Quick Chapter Recap: Improvement in Food Resources

Chapter 12 explores how India can feed its 1.4 billion people by improving crop yields and animal productivity. After the Green Revolution of the 1960s, India adopted High-Yielding Variety seeds, chemical fertilizers, and modern irrigation—transforming from a food-importing nation to self-sufficient in grains. The chapter covers three pillars: crop production management (seed selection, water, nutrients, pest control), animal husbandry (cattle, buffalo, poultry for milk, meat, eggs), and sustainable practices like crop rotation, Integrated Pest Management, and crossbreeding. Key terms include HYV seeds (Sonalika wheat, IR-8 rice), macronutrients (NPK), irrigation methods (canal, well, drip, sprinkler), manure vs fertilizer, IPM, dairy breeds (Gir, Sahiwal, Jersey, Holstein), poultry layers and broilers, and composite fish culture. Understanding these concepts is crucial because they explain how scientific methods boost food security without exhausting natural resources—a theme tested repeatedly in CBSE board exams.

Green Revolution introduced HYV seeds, fertilizers, and irrigation in the 1960s, doubling grain production across Punjab and Haryana.
Crop production steps: soil preparation, seed selection, sowing, adding manure/fertilizer, irrigation, pest control, harvesting, storage.
Irrigation types: canal (river water), well/tube-well (groundwater), sprinkler (water spray), drip (slow droplets at roots—most efficient).
Manures (compost, farmyard manure) improve soil structure slowly; fertilizers (Urea, DAP) supply nutrients fast but can harm soil if overused.
Integrated Pest Management uses cultural, biological, and minimal chemical methods—safer and sustainable than heavy pesticide reliance.
Cattle breeds: Indigenous (Gir, Sahiwal—heat-tolerant, lower yield), exotic (Jersey, Holstein—high yield, need care), crossbred (balance).
Poultry: layers (egg production), broilers (meat). Fish farming includes composite culture (multiple species in one pond for efficient space use).

Worksheet Format and Instructions

This worksheet is structured to mirror CBSE Class 9 Biology exam patterns seen in 2024 and 2025 papers. Difficulty level is Moderate, suitable for average to above-average students. Suggested time is 60–75 minutes under exam conditions. The worksheet has six sections: Section A (6 MCQs, 1 mark each), Section B (5 fill-in-the-blanks, 1 mark each), Section C (match-the-following or true/false, 5 marks), Section D (5 short-answer questions, 2–3 marks each, total 12 marks), Section E (3 long-answer/HOTS questions, 5 marks each, total 15 marks), and one case-study question (4 marks). Total marks: 47. Students should attempt all questions, write answers in neat handwriting if printing, and review the answer key only after completing the worksheet independently. Teachers can use this for class tests, homework, or revision before term exams. Parents seeking structured Biology practice for their Class 9 child will find this worksheet saves time and covers the entire NCERT chapter comprehensively.

Difficulty: Moderate (suitable for Class 9 students preparing for CBSE board exams and school assessments).
Time: 60–75 minutes (recommended under timed conditions to simulate exam pressure).
Total Marks: 47 (MCQs-6, Fill-blanks-5, Match/True-False-5, Short-12, Long-15, Case-study-4).
Instructions: Read each question carefully, write answers in your own words (no copying from answer key during attempt), show working for numerical/HOTS questions.
Use black/blue pen for answers, pencil for diagrams if any, and underline key terms like 'HYV', 'IPM', 'NPK' for clarity.

Section A: Multiple Choice Questions (1 mark each)

Multiple-choice questions test quick recall and conceptual clarity. Each question has four options; only one is correct. These questions are drawn from core NCERT topics—crop varieties, irrigation, nutrients, pest management, and animal breeds. Students should eliminate obviously wrong options first, then choose the best answer. Negative marking is not common in school worksheets, but accuracy builds confidence for board exams where every mark counts. The six MCQs below cover a range of sub-topics to ensure broad chapter coverage.

Q1. Which of the following is a high-yielding variety of wheat developed during the Green Revolution? (a) Jaya (b) Sonalika (c) Pusa Gaurav (d) IR-8
Q2. Drip irrigation is most suitable for: (a) Rice cultivation (b) Water-scarce regions and horticulture crops (c) Canal-fed plains (d) Waterlogged areas
Q3. Nitrogen is a macronutrient essential for: (a) Root development (b) Leaf and stem growth (c) Fruit ripening (d) Disease resistance
Q4. Integrated Pest Management primarily relies on: (a) Heavy use of chemical pesticides (b) Combination of cultural, biological, and minimal chemical methods (c) Only biological control (d) Genetically modified pest-resistant crops
Q5. Which cattle breed is an exotic (foreign) high-milk-yielding breed? (a) Gir (b) Sahiwal (c) Jersey (d) Hariana
Q6. In composite fish culture, multiple fish species are grown together to: (a) Increase water temperature (b) Utilize different zones of the pond efficiently (c) Reduce feeding cost to zero (d) Prevent disease spread

Section B: Fill in the Blanks (1 mark each)

Fill-in-the-blank questions require precise recall of terms and definitions from NCERT Class 9 Biology Chapter 12. Students must supply the exact word or phrase that completes each sentence. This section tests vocabulary and understanding of key processes like manure preparation, breed names, and crop practices. Spelling matters—marks may be deducted for incorrect spelling of scientific terms. Read each sentence fully before filling the blank to ensure grammatical and contextual correctness. The five statements below cover nutrient sources, animal breeds, irrigation, and pest control terminology.

Q7. ___________ are organic substances obtained from decomposition of plant and animal wastes, which improve soil structure and fertility.
Q8. The three essential macronutrients required by plants in large quantities are Nitrogen, ___________, and Potassium.
Q9. ___________ is the practice of growing two or more crops simultaneously on the same field to maximize land use and reduce pest buildup.
Q10. ___________ cattle are indigenous Indian breeds known for heat tolerance and disease resistance but give lower milk yield compared to exotic breeds.
Q11. ___________ irrigation involves water being supplied drop by drop directly to plant roots, saving up to 50% water compared to flood methods.

Section C: Match the Following (5 marks)

Match-the-following questions test your ability to link concepts, examples, and definitions. Column A lists five items (crop varieties, breeds, practices, or diseases); Column B lists their descriptions, effects, or categories in jumbled order. Draw lines or write the correct pairs (e.g., A-iii, B-i). Each correct match earns 1 mark. This section assesses your memory of specific examples taught in NCERT—like which variety belongs to which crop, or which breed serves which purpose. Carefully read all options in Column B before matching to avoid confusion. The five pairs below integrate crop production and animal husbandry topics.

Column A: (A) Sonalika, (B) Gir, (C) Layers, (D) Urea, (E) IPM
Column B: (i) Indigenous cattle breed from Gujarat with high disease resistance, (ii) Nitrogenous chemical fertilizer supplying nitrogen for leaf growth, (iii) High-yielding wheat variety released during Green Revolution, (iv) Poultry birds reared for egg production, (v) Eco-friendly pest control combining cultural, biological, and minimal chemical methods

Section D: Short Answer Questions (2–3 marks each)

Short-answer questions require 30–50 word responses. Write clear, concise answers using bullet points or short paragraphs. Include key terms from NCERT (like 'HYV', 'Green Revolution', 'macronutrient', 'crossbred', 'IPM') and provide brief explanations or examples where asked. Marks are awarded for correctness, clarity, and coverage of the question's scope. Avoid vague statements—be specific. For instance, if asked to list benefits, mention at least two concrete points. The five questions below span crop production, soil management, pest control, and animal husbandry, reflecting typical CBSE Class 9 Biology exam patterns.

Q12. (2 marks) What was the Green Revolution? Name two high-yielding crop varieties introduced during this period in India.
Q13. (3 marks) Differentiate between manure and fertilizer. Mention one advantage of each.
Q14. (2 marks) Define Integrated Pest Management (IPM). Why is it preferred over heavy pesticide use?
Q15. (3 marks) List three desirable traits scientists look for when developing high-yielding crop varieties.
Q16. (2 marks) Why is crossbreeding done in cattle? Name one indigenous and one exotic cattle breed used in crossbreeding programs in India.

Section E: Long Answer and HOTS Questions (5 marks each)

Long-answer questions demand detailed responses of 80–120 words, structured logically with introduction, main points, and examples. HOTS (Higher Order Thinking Skills) questions test application, analysis, and evaluation—not just recall. Use diagrams or flowcharts if they add clarity (label them neatly). Marks are distributed: typically 1 for introduction/definition, 3 for main content (covering three or more distinct points), and 1 for example or conclusion. Write in paragraphs or numbered points—both are acceptable as long as the answer is coherent. The three questions below require you to explain processes (crop production), justify practices (IPM rationale), and describe management systems (cattle care), mirroring the depth expected in CBSE Class 9 board exams.

Q17. (5 marks) Describe the major steps involved in crop production from soil preparation to harvesting. Mention the role of each step in ensuring good yield.
Q18. (5 marks) Explain why Integrated Pest Management is considered more sustainable than relying solely on chemical pesticides. Support your answer with three reasons and one example.
Q19. (5 marks) A farmer wants to start a small dairy farm with crossbred cattle. Suggest five management practices he should follow to ensure high milk yield and healthy animals.

Section F: Case Study Question (4 marks)

Case-study questions present a real-world scenario followed by 2–3 sub-questions. Read the passage carefully, underline key data (numbers, names, problems, solutions), then answer each sub-question in 20–30 words. Marks are awarded for applying chapter concepts to the given context—so explicitly mention terms like 'HYV', 'drip irrigation', 'IPM', 'crossbred', etc. This question type has become common in CBSE competency-based assessments from 2023 onward, testing your ability to analyze situations rather than rote-learn facts. The case below involves a farm facing low yield and pest issues, requiring you to diagnose problems and suggest improvements based on Chapter 12 principles.

Complete Answer Key with Explanations

The answer key below provides correct answers and brief explanations for every question in the worksheet. Students should attempt all questions independently before consulting this section. Teachers can use the explanations to guide class discussions or remedial teaching. Each answer references the relevant NCERT page or concept, helping students trace back to the source text for deeper understanding. Marks indicated in brackets show the allocation for multi-part answers. If your answer differs slightly but covers the same core idea using NCERT terminology, it should be acceptable—discuss with your teacher if unsure. This answer key is designed not just for marking but for learning, so read explanations even for questions you answered correctly to reinforce concepts.

Answer Key: Section A (MCQs)

A1. (b) Sonalika — Sonalika is a high-yielding wheat variety released during the Green Revolution; IR-8 is rice, Jaya is also rice, Pusa Gaurav is mustard. A2. (b) Water-scarce regions and horticulture crops — Drip irrigation delivers water slowly at roots, reducing wastage; ideal for arid zones (Rajasthan, Maharashtra) and crops like grapes, tomatoes. Rice needs flooded fields (not drip). A3. (b) Leaf and stem growth — Nitrogen (N) is a component of chlorophyll and proteins, promoting vegetative (green) growth; phosphorus aids roots, potassium boosts overall plant health. A4. (b) Combination of cultural, biological, and minimal chemical methods — IPM integrates crop rotation, natural predators (biocontrol), and judicious pesticide use only when necessary, avoiding ecosystem damage. A5. (c) Jersey — Jersey and Holstein are exotic breeds from Europe/America, high milk yield; Gir, Sahiwal, Hariana are Indian indigenous breeds. A6. (b) Utilize different zones of the pond efficiently — Composite fish culture grows surface feeders (Catla), middle feeders (Rohu), bottom feeders (Mrigal) together, maximizing space and yield without competition.

Answer Key: Sections B, C, D, E, F

B7. Manures (or Organic manures) — NCERT defines manures as decomposed organic matter from plants/animals, improving soil structure and slowly releasing nutrients. B8. Phosphorus — The three macronutrients are Nitrogen (N), Phosphorus (P), Potassium (K), often abbreviated NPK. B9. Intercropping (or Mixed cropping) — Growing two crops simultaneously, e.g., maize + pulse, reduces pest/disease spread and maximizes income. B10. Indigenous (or Desi) — Examples: Gir, Sahiwal, Hariana—adapted to Indian heat, lower yield (4-8 L/day) but hardy. B11. Drip — Drip irrigation can save 30-50% water vs flood methods, crucial in water-scarce regions. C: A-iii (Sonalika=HYV wheat), B-i (Gir=indigenous cattle), C-iv (Layers=egg poultry), D-ii (Urea=N fertilizer), E-v (IPM=integrated pest mgmt). D12. (2 marks) The Green Revolution (1960s-70s) involved adoption of HYV seeds, fertilizers, and irrigation to boost grain production. Two varieties: Sonalika wheat, IR-8 rice. (1+1 marks) D13. (3 marks) Manure: organic, slow-release, improves soil structure, less nutrient concentration. Fertilizer: chemical, fast-acting, precise nutrient supply but can harm soil if overused. Advantage of manure: enhances soil biology. Advantage of fertilizer: quick correction of deficiency. (1.5+1.5 marks) D14. (2 marks) IPM is eco-friendly pest control using cultural (crop rotation), biological (natural enemies), and minimal chemical methods. Preferred because it reduces chemical residues, preserves beneficial insects, and prevents pest resistance. (1+1 marks) D15. (3 marks) Desirable traits: (i) High yield, (ii) Disease/pest resistance, (iii) Early maturity/short duration, (iv) Tolerance to drought/salinity, (v) Better nutritional quality. (Any three, 1 mark each.) D16. (2 marks) Crossbreeding combines desirable traits—exotic breeds give high yield, indigenous give hardiness. Example: Holstein (exotic) × Gir (indigenous) = crossbred with 12-16 L/day yield and heat tolerance. (1+1 marks) E17. (5 marks) Steps: (i) Soil preparation—ploughing, levelling for aeration. (ii) Seed selection—HYV for higher yield. (iii) Sowing—right depth, spacing, season. (iv) Manuring/fertilizing—NPK supply. (v) Irrigation—adequate water at critical stages. (vi) Weed control—removing competitors. (vii) Pest/disease control—IPM methods. (viii) Harvesting—timely to reduce loss. (ix) Storage—protection from moisture, rodents. Each step critical for maximizing productivity. (1 intro + 3 for 7-8 steps + 1 conclusion = 5 marks.) E18. (5 marks) IPM sustainable because: (i) Reduces chemical load—prevents soil/water pollution and health hazards. (ii) Preserves biodiversity—protects pollinators, natural predators. (iii) Prevents pest resistance—rotating methods stops pests adapting. Example: Tamil Nadu rice farmers using manual removal of stem borer eggs + neem spray + biocontrol wasps cut pesticide use 60%, maintained yield, saved cost. (1+1+1+1+1 marks.) E19. (5 marks) Dairy farm management: (i) Breed selection—choose crossbred (e.g., Holstein × Sahiwal) for yield + hardiness. (ii) Housing—clean, well-ventilated shed protecting from extreme weather. (iii) Nutrition—balanced feed (green fodder, concentrate, minerals). (iv) Health care—regular vaccination, deworming, vet checkups. (v) Reproduction—artificial insemination with good bulls, proper calving interval (12-15 months). (1 mark each practice = 5 marks.) F-Case: (a) (1 mark) Ramesh uses traditional low-yield seeds and flood irrigation wastes water—neighbour likely uses HYV seeds and efficient irrigation. (b) (2 marks) Switch to HYV wheat like Sonalika (1 mark); adopt drip or sprinkler irrigation to save water and supply evenly (1 mark). (c) (1 mark) Adopt IPM: crop rotation, use of natural predators, minimal chemical pesticides only if necessary—reduces cost and environmental harm.

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Frequently asked questions

What is the difficulty level and suggested time for this CBSE Class 9 Biology Chapter 12 worksheet?+

Difficulty level is Moderate, suitable for average to above-average Class 9 students. Suggested time is 60–75 minutes under exam conditions. Total marks are 47, covering MCQs, fill-blanks, match-the-following, short answers, long answers, and one case study—mirroring the CBSE 2025 exam pattern closely.

Does this worksheet include answers and explanations for all questions?+

Yes, a complete answer key with brief explanations is provided at the end. Each answer references NCERT concepts and explains why it is correct, helping students learn from mistakes and reinforcing key ideas like HYV, IPM, manure vs fertilizer, and crossbreeding.

Which topics from Chapter 12 Improvement in Food Resources are covered in this worksheet?+

All major NCERT topics are covered: crop production steps, HYV seeds (Sonalika, IR-8), irrigation methods (canal, well, drip, sprinkler), nutrient management (NPK, manure, fertilizer), Integrated Pest Management, animal husbandry (cattle breeds like Gir, Jersey, Sahiwal), poultry (layers, broilers), and fish farming (composite culture).

How many marks does Chapter 12 typically carry in CBSE Class 9 Biology board exams?+

Chapter 12 usually carries 4–6 marks in CBSE Class 9 Biology theory exams, appearing as one 2-mark short-answer, one 3-mark question, and sometimes a 5-mark long-answer or case-study question. Practising worksheets like this ensures full coverage and confidence.

Can I use this worksheet for school assignments or term exam revision?+

Absolutely. Teachers often assign such worksheets for homework or class tests. Students can use it for self-assessment before term exams or board preparation. Parents can print it for weekend practice. The mix of question types (MCQ, short, long, case-study) makes it versatile for all revision needs.

What are high-yielding variety (HYV) seeds, and why are they important for food production?+

HYV seeds are specially bred crop varieties that produce significantly higher yields than traditional seeds—examples include Sonalika wheat and IR-8 rice. They were central to India's Green Revolution, helping the country achieve food self-sufficiency. HYV seeds require proper irrigation, fertilizers, and care but can produce 3–5 times more grain per hectare.

What is the difference between manure and fertilizer, and which is better?+

Manure is organic matter (compost, farmyard manure) that slowly releases nutrients and improves soil structure. Fertilizer is a chemical compound (Urea, DAP) supplying nutrients quickly and precisely. Both have roles: manure for long-term soil health, fertilizer for immediate deficiency correction. Best practice combines both for sustainable high yields.

How does Integrated Pest Management (IPM) differ from using chemical pesticides alone?+

IPM combines cultural methods (crop rotation, resistant varieties), biological control (natural predators like ladybirds), and minimal, targeted chemical use only when necessary. Unlike blanket pesticide spraying, IPM reduces environmental damage, preserves beneficial insects, prevents pest resistance, and lowers cost—making it the sustainable choice recommended by NCERT.

Why is crossbreeding done in cattle, and what are crossbred cattle?+

Crossbreeding mixes indigenous breeds (Gir, Sahiwal—hardy, heat-tolerant, lower yield) with exotic breeds (Jersey, Holstein—high yield, need care) to get offspring with balanced traits: decent milk yield (12–16 L/day) plus disease resistance and climate adaptability. This is cost-effective for Indian dairy farmers and widely practiced across the country.

What is composite fish culture, and how does it increase productivity?+

Composite fish culture grows multiple fish species together in one pond—surface feeders (Catla), middle feeders (Rohu), and bottom feeders (Mrigal, Common Carp). Since they occupy different zones and eat different food, they do not compete, allowing efficient use of space and higher total yield per pond compared to single-species culture.

How can CBSETUTOR.ai help if I am stuck on any question in this worksheet?+

Simply take a photo of the question using your phone, upload it to CBSETUTOR.ai, and the AI tutor will provide a step-by-step solution instantly—any time, day or night. You get detailed explanations aligned to NCERT, not just the final answer. At ₹999/month for all subjects and classes 6-12, plus a 3-day free trial, it is the most affordable and convenient way to master CBSE Biology without expensive coaching.

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