Stubble Burning :
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Stubble burning is a common practice followed by farmers to prepare fields for sowing of wheat in November as there is little time left between the harvesting of paddy and sowing of wheat.
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Open burning of husk produces harmful smoke that causes pollution. Open burning of husk is of incomplete combustion in nature. Hence large amount of toxic pollutants are emitted in the atmosphere. Pollutants contain harmful gases like Methane, Carbon Monoxide (CO), Volatile organic compound (VOC) and carcinogenic polycyclic aromatic hydrocarbons.
Why do farmers opt for stubble burning :
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Cost Factor: The straw management equipment is costly and process is time consuming. Also, the cost of stubble management is not taken into account while determining the minimum support price (MSP).
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Increasing mechanization of agriculture: Stubble problem was not as severe when paddy was harvested manually because the farmers use to cut it as close to the ground as possible. Due to mechanization the crop residue that remains in the field is of larger quantity;
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Labour costs are very high now
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Time Factor: Delay in sowing means yield decline, this leaves very little time to clear the farm for sowing.
Advantages of Stubble burning :
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It quickly clears the field and is the cheapest alternative.
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Kills weeds, including those resistant to herbicide.
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Kills slugs and other pests.
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Can reduce nitrogen tie-up.
Issues :
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Stubble burning is adversely affecting the environment and public health. The problem has not been fully tackled and the adverse impacts on the air quality and consequent impacts on the citizens’ health and lives are undisputed.
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