Crop Production and Management — Question 6
Back to all questionsQuestion 6
What is irrigation? Describe two methods of irrigation which conserve water.
The supply of water to crops at regular intervals is called irrigation. The two methods of irrigation which conserve water are:
- Sprinkler System — This system is useful on the uneven land where sufficient water is not available. The perpendicular pipes, having rotating nozzles on top, are joined to the main pipeline at regular intervals. When water is allowed to flow through the main pipe under pressure with the help of a pump, it escapes from the rotating nozzles. It gets sprinkled on the crop as if it is raining. Sprinkler is very useful for lawns, coffee plantation and several other crops
- Drip system — It is more efficient than sprinkler system. The water is taken to plants through a pipe and water is given to plants drop by drop near their root. It is the best technique for watering fruit plants, gardens and trees. Water is not wasted at all. It is a boon in regions where availability of water is poor.
Chapter Overview: Crop Production and Management
This chapter covers the complete agricultural cycle from soil preparation to grain storage. Students learn about Kharif and Rabi crops, modern and traditional irrigation methods, the difference between manure and fertiliser, and how food grains are harvested, threshed, and stored. Animal husbandry is introduced as a complementary food production practice.
Board Exam Weightage: 5-7 marks | Difficulty: Moderate
Key Formulas & Concepts
| Concept | Details |
|---|---|
| Kharif Crops | Sown in June-July (monsoon season); harvested in September-October. Examples: paddy, maize, soybean, cotton |
| Rabi Crops | Sown in October-November (winter); harvested in March-April. Examples: wheat, gram, pea, mustard |
| Drip Irrigation | Water delivered drop by drop at plant roots; most water-efficient method |
| Sprinkler Irrigation | Water sprayed through rotating nozzles; suitable for uneven land |
Must-Know Concepts
- Soil preparation loosens soil and brings nutrients to the surface
- Seed drill ensures uniform spacing and depth of sowing
- Manure is organic (plant/animal waste), fertiliser is chemical (NPK)
- Weeds compete with crops for water, nutrients, and sunlight
- Combine harvester does harvesting and threshing simultaneously
- Grains must be dried to reduce moisture before storage
Manure vs Fertiliser
| Feature | Manure | Fertiliser |
|---|---|---|
| Source | Plant/animal waste (organic) | Chemical factories (inorganic) |
| Nutrients | All nutrients + humus | Specific (N, P, or K) |
| Soil Effect | Improves soil texture and water-holding | No improvement; may degrade soil over time |
| Speed | Slow-acting, long-lasting | Fast-acting, short-term |
| Pollution | None | Excessive use causes soil/water pollution |
Common Mistakes to Avoid
- Confusing Kharif and Rabi crops and their growing seasons
- Thinking manure and fertiliser are interchangeable
- Not knowing the difference between threshing and winnowing
- Forgetting that irrigation means artificial water supply, not rainfall
Scoring Tips
- Learn crop classification with seasonal memory aids
- Draw flowcharts of the complete crop production process
- Compare irrigation methods in a table for quick revision
- Practice NCERT in-text questions for definitions
Frequently Asked Questions
Q: How many marks does this chapter carry in the exam?
A: Approximately 5-7 marks in the annual exam.
Q: What question types are commonly asked?
A: MCQs (1 mark), Very Short Answer (2 marks), Short Answer (3 marks), and Long Answer / Diagram (5 marks).
Q: Is this chapter important for competitive exams?
A: Yes, concepts from this chapter appear in NTSE, Olympiad, and other science competitions.