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What is Irrigation?
Grade Level:
Class 6
Law, Civic Literacy, Economics, FinTech, Geopolitics, Personal Finance, Indian Governance
Definition
What is it?
Irrigation is the artificial supply of water to land or crops to help them grow, especially when there isn't enough rainfall. It's like giving plants a drink when nature doesn't provide enough water.
Simple Example
Quick Example
Imagine your school garden. If it hasn't rained for many days and the plants look dry, your gardener might use a hosepipe to water them. This act of giving water to the plants when they need it is a simple form of irrigation.
Worked Example
Step-by-Step
PROBLEM: A farmer has a 2-acre field where he grows wheat. Each acre needs 10,000 litres of water per week through irrigation. How much water does he need to irrigate his entire field for 4 weeks?
---STEP 1: Find water needed for 1 acre per week.
Water needed for 1 acre/week = 10,000 litres.
---STEP 2: Find water needed for 2 acres per week.
Water needed for 2 acres/week = 10,000 litres/acre * 2 acres = 20,000 litres.
---STEP 3: Find total water needed for 4 weeks.
Total water needed for 4 weeks = 20,000 litres/week * 4 weeks = 80,000 litres.
---ANSWER: The farmer needs 80,000 litres of water to irrigate his entire field for 4 weeks.
Why It Matters
Understanding irrigation is vital for ensuring food security in our country, as it directly impacts crop yield and farmer livelihoods. It's crucial for careers in agriculture, water management, and even in policymaking related to food production and resource allocation.
Common Mistakes
MISTAKE: Thinking irrigation is only about canals. | CORRECTION: Canals are one method, but irrigation includes many ways like tube wells, sprinklers, and drip systems.
MISTAKE: Confusing irrigation with natural rainfall. | CORRECTION: Irrigation is the artificial, human-controlled supply of water, while rainfall is natural.
MISTAKE: Believing irrigation is only for large farms. | CORRECTION: Even small kitchen gardens or potted plants need irrigation when natural water is insufficient.
Practice Questions
Try It Yourself
QUESTION: Why is irrigation important for farmers in dry areas? | ANSWER: It helps them grow crops even when there is little or no rainfall, ensuring food and income.
QUESTION: Name two traditional methods of irrigation used in India. | ANSWER: Two traditional methods are well irrigation and canal irrigation.
QUESTION: A farmer uses a sprinkler system that waters 500 square metres in one hour. If his field is 2000 square metres, how long will it take to water the whole field? | ANSWER: Time taken = Total area / Area watered per hour = 2000 sq m / 500 sq m/hour = 4 hours.
MCQ
Quick Quiz
Which of the following is an example of irrigation?
Rain falling on crops
A farmer using a pump to draw water from a well for his fields
Dew drops forming on leaves in the morning
A river flowing naturally through a field
The Correct Answer Is:
B
Option B describes a farmer actively supplying water to his fields using a pump, which is an artificial method. Options A, C, and D are all natural occurrences of water.
Real World Connection
In the Real World
In India, the government invests heavily in irrigation projects like building large dams (e.g., Bhakra Nangal Dam) and networks of canals to bring water to farms far from rivers. Farmers also use modern techniques like drip irrigation, which saves water, and rely on groundwater pumped by electric motors, especially in states like Punjab and Haryana, to ensure crops like rice and wheat get enough water.
Key Vocabulary
Key Terms
ARTIFICIAL: Not natural, made or done by humans | CROPS: Plants grown by farmers for food or other products | RAINFALL: Water falling from the sky as rain | GROUNDWATER: Water found beneath the Earth's surface | CANAL: A long, man-made channel for water, often used for irrigation or transport.
What's Next
What to Learn Next
Now that you understand what irrigation is, you can explore different 'Methods of Irrigation'. This will help you learn about the various techniques farmers use, from traditional wells to modern drip systems, and how each impacts water usage and crop growth.
