Tamilnadu Agriculture — Class 9 Social Science (Samacheer Kalvi)
TN State Board (Samacheer Kalvi) Class 9 Social Science, Economics — Chapter 4. Farming and agricultural development in Tamil Nadu.
1. About this lesson
Agriculture is the backbone of TN's rural economy. This chapter covers major crops, irrigation, the Green Revolution, challenges, and government schemes supporting farmers in the state.
2. Agriculture in Tamil Nadu
- ~40% of TN's workforce depends on agriculture.
- TN has 7 agro-climatic zones.
- Paddy (rice) is the most important crop.
Cropping Seasons in TN
| Season | TN Name | Period | Major Crops |
|---|---|---|---|
| Kharif | Kuruvai / Samba | Jun–Sep | Paddy, maize, cotton |
| Rabi | Navarai | Oct–Mar | Paddy, pulses |
| Summer | Zaid | Apr–Jun | Vegetables, watermelon |
Paddy is grown in all three seasons where irrigation is available.
3. Major Crops
| Crop | Key Districts | Notes |
|---|---|---|
| Paddy | Thanjavur, Tiruvarur, Nagapattinam (Cauvery Delta) | "Rice Bowl of TN" |
| Sugarcane | Villupuram, Cuddalore, Tiruvannamalai | Major cash crop |
| Cotton | Coimbatore, Tiruppur, Madurai | White gold; textile industry |
| Groundnut | Vellore, Tiruvannamalai | Oilseed |
| Millets (Jowar, Bajra, Ragi) | Dharmapuri, Krishnagiri | Dryland crops |
| Pulses | Thoothukudi, Tirunelveli | Protein source |
4. Irrigation
- Cauvery River — lifeline of TN agriculture (Delta region).
- Other rivers: Vaigai, Tamirabarani, Palar.
- Tanks (Kanmais) — traditional irrigation.
- Wells/tube wells — groundwater; over-extraction is a concern.
- Major dams: Mettur (Cauvery), Bhavanisagar, Amaravathi.
5. Green Revolution in TN
- Introduction of HYV seeds, chemical fertilisers, pesticides, mechanisation.
- Significant increase in paddy production in the Cauvery Delta.
- Challenges: Overuse of chemicals → soil degradation; groundwater depletion; inequality (large farmers benefited more).
6. Challenges
- Water scarcity (Cauvery dispute with Karnataka).
- Fragmentation of landholdings — most farmers are small/marginal.
- Farmer suicides due to debt and crop failure.
- Middlemen — farmers get low prices.
- Climate change — erratic rainfall, cyclones, drought.
7. Government Schemes
| Scheme | Purpose |
|---|---|
| PM-KISAN | ₹6,000/year income support to farmers |
| PMFBY (Crop Insurance) | Insurance against crop loss |
| Uzhavar Sandhai | Farmers' markets — direct selling, no middlemen |
| Free electricity | TN subsidy for irrigation pumps |
| Micro-irrigation | Promotion of drip and sprinkler systems |
8. Worked examples
Example 1. Which district is the "Rice Bowl of TN"? Thanjavur (Cauvery Delta).
Example 2. Name a major cash crop of TN. Sugarcane.
Example 3. What is Uzhavar Sandhai? Farmers' markets — farmers sell directly, no middlemen.
9. Book-back questions (Samacheer Kalvi)
I. Choose the correct answer
-
The "Rice Bowl of Tamil Nadu" refers to — (a) Coimbatore / (b) Thanjavur / (c) Madurai / (d) Chennai. Ans: (b) Thanjavur.
-
Which is a cash crop? — (a) Rice / (b) Wheat / (c) Sugarcane / (d) Ragi. Ans: (c) Sugarcane.
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The lifeline of TN agriculture is the — (a) Ganga / (b) Yamuna / (c) Cauvery / (d) Godavari. Ans: (c) Cauvery.
-
Uzhavar Sandhai helps farmers by — (a) giving loans / (b) providing insurance / (c) direct selling to consumers / (d) free electricity. Ans: (c) direct selling to consumers.
-
Millets are grown mainly in — (a) Delta regions / (b) Coastal areas / (c) Dryland regions / (d) Hills. Ans: (c) Dryland regions.
II. Fill in the blanks
- Kuruvai/Samba is the Kharif season in TN.
- The Green Revolution introduced HYV seeds and chemical fertilisers.
- The Cauvery River is the lifeline of TN agriculture.
- PM-KISAN provides ₹6,000 per year to farmers.
- Uzhavar Sandhai means farmers' market.
III. Match the following
| Column A | Column B |
|---|---|
| Thanjavur | Rice Bowl of TN |
| Sugarcane | Cash crop |
| Cauvery | Lifeline of TN |
| Uzhavar Sandhai | Farmers' market |
| Millets | Dryland crops |
IV. Answer briefly
-
Major crops of TN — Paddy (Thanjavur), Sugarcane (cash crop), Cotton, Groundnut, Millets (dryland), Pulses.
-
Cropping seasons in TN — Kharif/Kuruvai (Jun–Sep), Rabi/Navarai (Oct–Mar), Summer/Zaid (Apr–Jun). Paddy grows in all three.
-
Challenges in TN agriculture — Water scarcity, fragmentation of land, farmer suicides, middlemen, climate change.
-
Green Revolution impact — Increased paddy production via HYV seeds, fertilisers, mechanisation. But overuse led to soil degradation and groundwater depletion.
V. Answer in detail
-
Explain irrigation in TN.
- Cauvery River — lifeline; Delta region.
- Other rivers: Vaigai, Tamirabarani, Palar.
- Tanks (Kanmais) — traditional; wells/tube wells — groundwater.
- Dams: Mettur (Cauvery), Bhavanisagar, Amaravathi.
- Micro-irrigation being promoted.
-
Discuss government schemes for TN farmers.
- PM-KISAN: ₹6,000/year.
- PMFBY: Crop insurance.
- Uzhavar Sandhai: Direct farmer-to-consumer markets.
- Free electricity for irrigation.
- Micro-irrigation promotion.
10. Common mistakes
- Mistake: Rice Bowl of TN is Madurai. Fix: Thanjavur (Cauvery Delta) is the Rice Bowl.
- Mistake: Millets need lots of water. Fix: Millets are dryland crops — low-rainfall areas.
- Mistake: Cauvery water dispute is with Kerala. Fix: Cauvery dispute is with Karnataka.
11. Quick revision
- Economics Ch 4 · Tamilnadu Agriculture.
- ~40% TN workforce in agriculture. 7 agro-climatic zones.
- Crops: Paddy (Thanjavur — Rice Bowl), Sugarcane (cash), Cotton, Millets (dryland).
- Seasons: Kuruvai/Samba, Navarai, Summer.
- Irrigation: Cauvery (lifeline), tanks, wells, Mettur Dam.
- Challenges: Water scarcity, farmer suicides, middlemen, climate.
- Schemes: PM-KISAN, PMFBY, Uzhavar Sandhai, free electricity.
