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Improvement in Food Resources — Question 3

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Question 3

What are the advantages of inter-cropping and crop rotation?

Answer

Advantages of inter-cropping:

  1. Crops give better return.
  2. Spread of insect-pest is less.
  3. Weed infestation is less.
  4. Maintain soil health.
  5. Reduced need of fertilizers.

Advantages of crop rotation:

  1. Prevents soil nutrition loss or replenishes nutrition.
  2. Maintains soil texture.
  3. Prevents infestation of weeds, insects and pests.
  4. Gives better return.
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Science | Chapter 12: Improvement in Food ResourcesWeb Content — Quick Reference

Chapter 12: Improvement in Food Resources — Quick Reference

crop improvement animal husbandry fish farming bee keeping manure fertiliser irrigation

Quick Revision Points

  • Crop improvement: hybridisation (intervarietal, interspecific, intergeneric), GMOs
  • Macronutrients: N, P, K, Ca, Mg, S. Micronutrients: Fe, Mn, B, Zn, Cu, Mo, Cl
  • Manure (organic, humus, slow) vs Fertiliser (chemical, specific, fast)
  • Cropping: mixed (seeds mixed), inter (definite rows), rotation (successive seasons)
  • Cattle: milch (milk) vs draught (labour); Poultry: broilers (meat) vs layers (eggs)
  • Fish: marine (sea) vs inland (freshwater); Composite fish culture: 5-6 species together
  • Bee keeping: Apis cerana indica, Apis mellifera; depends on pasturage
Exam Tips for Chapter 12
  • Read the detailed chapter notes for complete coverage of all NCERT topics.
  • Practice all NCERT in-text and back exercise questions — they are frequently asked in exams.
  • Focus on comparison tables, diagrams, and definitions — these are high-scoring areas.
  • For numericals (if applicable), practice at least 20 problems of varying difficulty.
  • Refer to the practice question bank (200+ questions) for thorough preparation.
Related Resources
  • Detailed Notes: ch12-improvement-in-food-resources.html
  • Practice Questions: 100+ questions with answers in 05-practice-questions/
  • Chapter Test: 30-mark test paper in 06-tests/chapter-tests-30marks/
  • Formula Sheet: Complete formula reference in 03-teacher-aid/formula-sheet.html
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