Why stubble fires keep coming back

What is stubble burning, and why is it concentrated in North India between October and November?

Stubble burning is the practice of setting fire to the lower parts of plants left in fields after harvesting. It matters because the smoke releases fine particles, carbon monoxide, volatile organic compounds, and carcinogenic substances. These pollutants help create thick smog over North India.

The practice is concentrated in Punjab, Haryana, and parts of Uttar Pradesh from early October to late November. Paddy is harvested late, often in late October or early November, after delayed transplantation. Combine harvesters also leave about a foot of straw behind. Clearing it manually takes time and money.

Farmers then face only a 10-15-day window before wheat must be sown. Burning is therefore a fast, low-cost way to remove residue, even though it damages soil and worsens air pollution. The timing reflects farming schedules shaped by water rules, crop varieties, and procurement incentives.

How much paddy straw do Punjab and Haryana produce, and how much of their paddy harvest is bought through government procurement?

Punjab and Haryana together produce around 29 million metric tons of paddy straw. That enormous volume helps explain why residue management becomes a major environmental problem when harvesting and wheat sowing are tightly compressed.

Government procurement strongly reinforces paddy cultivation. Between 2012 and 2024, procurement covered about 87% of Punjab’s paddy production and 74% of Haryana’s. The national average was only about 37%, including these two States. Without Punjab and Haryana, the national comparison could be even wider.

These figures show why farmers receive unusually strong income assurance for paddy in the two States. Procurement reduces the financial risk of growing rice and discourages diversification. The result is a large, predictable stream of paddy residue each autumn, much of it produced under difficult time constraints.

What happens to air quality, human health, and soil fertility when crop residue is burned?

Burning crop residue sharply worsens air quality. It releases large amounts of particulate matter, carbon monoxide, volatile organic compounds, and other carcinogenic substances. Together, these emissions form thick smog that can harm human health, especially during North India’s winter pollution episode.

The damage also remains in the field. Burning depletes nitrogen, sulphur, potash, phosphorus, and other micronutrients. The heat removes soil moisture and organic content. This weakens soil fertility and reduces the material that supports productive soil.

Farmers may then need more fertilizers in the next crop cycle. Thus, burning creates a chain of costs: polluted air, health risks, nutrient loss, and higher dependence on purchased inputs. Its immediate speed can therefore produce longer-term environmental and farming problems.

How did the Punjab Preservation of Sub-Soil Water Act change the timing of paddy cultivation and increase pressure to burn stubble?

The Punjab Preservation of Sub-Soil Water Act, 2009, was introduced after severe groundwater depletion. It prohibited paddy sowing before May 10 and transplanting before June 10. The aim was to align cultivation with monsoon rains and reduce groundwater extraction.

These restrictions delayed paddy transplantation and consequently delayed harvesting. Paddy was pushed toward late October and early November. The long-duration PUSA-44 variety, which takes 150-160 days to mature, narrowed the gap further. Combine harvesters left roughly a foot of residue behind.

Farmers then had just 10-15 days to clear fields and sow wheat. Manual removal was expensive and slow. The law addressed water depletion, but its altered crop calendar intensified pressure during harvest. Burning became an almost necessary shortcut for some farmers trying to meet the next sowing deadline.

Why do farmers continue growing paddy and wheat despite falling groundwater levels and restrictions on stubble burning?

Farmers continue growing paddy and wheat because the surrounding incentive system makes these crops comparatively secure. Minimum support prices and government procurement provide assured buyers and incomes, especially in Punjab and Haryana. This discourages farmers from shifting to crops with less dependable markets.

The contrast is striking: procurement covers 87% of Punjab’s paddy production and 74% of Haryana’s, compared with about 37% nationally. For wheat, the shares are 70% in Punjab and 63% in Haryana, against 30% nationally. Free electricity in Punjab and almost-free power in Haryana also supports intensive groundwater pumping.

These incentives outweigh the warning signs of falling water tables for many producers. They also keep paddy and wheat cultivation concentrated in the region. Until income support, procurement, electricity pricing, and crop choices change together, restrictions alone are unlikely to end residue burning.

What alternatives to burning exist, such as Happy Seeders, short-duration rice, and bioenergy, and why are they difficult for farmers to adopt?

Farmers can avoid burning by using in-situ equipment such as Happy Seeders, which sow wheat through standing residue, by choosing shorter-duration rice varieties, or by sending straw to bioenergy facilities. These options preserve more residue and reduce smoke, but they require changes in machinery, varieties, logistics, or markets.

A Happy Seeder can reduce the need to remove every straw fragment before wheat sowing. Short-duration rice can create more time between harvest and the next crop. Bioenergy projects can treat residue as a feedstock rather than waste. The supplied article identifies crop-residue-management machines but does not detail these alternatives.

Adoption remains difficult because farmers operate within a narrow 10-15-day window. Equipment may be costly or unavailable when needed, and new varieties can affect yields or income certainty. Bioenergy also requires dependable collection and transport systems. These barriers mean technical alternatives need practical financial and market support.

How do minimum support prices, government procurement, free electricity, and crop-season timing shape farmers’ decisions about what to grow and how to clear fields?

Farmers’ decisions reflect more than environmental rules. Minimum support prices and government procurement reduce the risk of growing paddy and wheat. Punjab and Haryana procure far larger shares of production than the national average, creating strong incentives to stay with these crops.

Electricity policy reinforces that choice. Free power in Punjab and almost-free power in Haryana makes groundwater pumping cheaper, supporting water-intensive paddy and wheat. Meanwhile, the 2009 water law delayed paddy sowing and transplanting to protect groundwater. Harvests consequently moved toward late October and early November.

The result is a compressed crop calendar. Farmers must clear residue and plant wheat within about 10-15 days, while combine harvesters leave substantial stubble. Manual removal is costly, so burning becomes a rapid response. The article’s figures suggest that lasting change requires coordinated shifts in procurement, electricity incentives, crop timing, and residue-management options.

Key Facts:

📌 Stubble burning sets fire to crop residue left after harvesting.

📌 It is concentrated in Punjab, Haryana, and parts of Uttar Pradesh.

📌 Farmers often have only 10-15 days before wheat sowing.

📌 Punjab and Haryana produce around 29 million metric tons of paddy straw.

📌 Punjab’s paddy procurement reached 87% of production.

📌 Haryana’s paddy procurement reached 74% of production.

📌 Burning releases particulate matter, carbon monoxide, VOCs, and carcinogenic substances.