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Stubble (parali) burning is a method of removing paddy crop residues from the field to sow wheat from the last week of September to November. Stubble burning is a process of setting on fire the straw stubble, left after the harvesting of grains, like paddy, wheat, etc. It is usually required in areas that use the combined harvesting method which leaves crop residue behind.
The process of burning farm residue is one of the major causes of air pollution in parts of north India, deteriorating the air quality.
Along with vehicular emissions, it affects the Air Quality Index (AQI) in the national capital and NCR. Stubble burning by farmers in Haryana, western Uttar Pradesh and Punjab in north India is considered a major cause of air pollution in Delhi and its adjoining regions.
Paddy stubble burning is practised mainly in the Indo-Gangetic plains of Punjab, Haryana, and UP to clear the fields for rabi crop sowing. The paddy crop is harvested between the first and last weeks of October in Punjab and Haryana. Then, farmers sow the wheat crop from the first week of November until the middle of December.
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