At a Glance
Four facts to hold on to.
Idea
Sow with minimal soil disturbance.
Machine
Zero-till drill or Happy Seeder.
Benefit
No residue burning before wheat.
UPSC 2020
All three advantages accepted.
In this lesson
What Zero Tillage Changes
The mechanism
- Conventional tillage turns and loosens most topsoil before sowing.
- A zero-till drill opens thin slots for the seed instead.
- Fewer passes save diesel, labour and time.
- Faster sowing lets wheat go in soon after rice harvest.
- Residue can stay as surface mulch.
- Mulch cuts evaporation and protects soil from raindrops.
One practice, not the whole system
- Benefits depend on residue, rotation, weeds and local conditions.
- Conservation agriculture combines minimal disturbance, soil cover and crop diversity.
True or False: A zero-till drill opens narrow seed slots without ploughing the whole field.
Rice Residue and the Happy Seeder
- Punjab and Haryana farmers have a short gap between rice harvest and wheat sowing.
- Loose straw can block ordinary drills.
- The Happy Seeder cuts through rice residue and sows wheat in one pass.
- It drops the straw back as mulch.
- This removes the need to burn residue before sowing.
- Avoided burning cuts smoke, nutrient loss and open-field emissions.
- Small farmers may not buy the machine. Custom-hiring centres and timely access shape adoption.
- Sources: Wikipedia, Happy seeder and Tata Trusts.
True or False: The Happy Seeder can sow wheat through rice residue and leave mulch above.
Previous Year Questions
UPSC 2020 asked about zero tillage.
- UPSC 2020Advantages of zero tillage: (1) wheat can be sown without burning the previous crop’s residue; (2) paddy seeds can be planted directly in wet soil without a nursery; (3) soil carbon sequestration is possible. The answer is (d) 1, 2 and 3. The word “possible” matters in statement 3. View the question.
True or False: UPSC accepted all three listed advantages of zero tillage.
True or False: Direct-seeded rice can skip nursery raising and transplanting.
Benefits Have Conditions
- Less soil disturbance can slow the breakdown of organic matter.
- Retained residue can add carbon over time.
- This does not guarantee carbon storage everywhere. Climate, soil, rotation and measurement depth all matter.
- A field study of rice-residue options found higher wheat grain yield and soil microbial counts with Happy Seeder residue retention than with burning. See the study in PMC.
- Weeds may change under zero tillage. Farmers need rotation and careful control.
- Heavy or waterlogged soils may need different machinery.
- Poor seed placement can reduce germination.
- Direct-seeded rice still needs good water and weed management.
Think it through: why does the word “possible” make UPSC’s third statement correct?
Zero tillage can raise soil carbon, but the gain varies with soil, climate and residue. The statement does not promise the same result everywhere. It only says sequestration is possible, and that is true.
True or False: Zero tillage guarantees the same carbon gain in every soil and climate.
True or False: Zero tillage automatically provides crop diversity and permanent soil cover.
True or False: Zero tillage always increases fuel and labour use.
Quick Q&A
What is zero tillage?
Sowing without ploughing.
Machine for wheat in straw?
Happy Seeder.
Main air benefit?
No residue burning.
Carbon gain guaranteed?
No, only possible.
UPSC 2020 answer?
1, 2 and 3.
🎲 Practice: Zero Tillage: How It Changes Wheat and Rice Farming
3 verified questions from this topic.
Question 1 of 1
Question 1 of 1
Question 1 of 1
Leave a Reply