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Alien paddy is causing stubble burning, but don't blame Punjab for Delhi smog this time -KS Pannu

-ThePrint.in

The paddy being grown in Punjab is alien to conditions in Punjab, and the burning of its stubble has had a big impact on the state’s air quality.

Punjab is an agrarian state with predominant wheat-paddy cropping cycle. During the kharif season every year, paddy is grown in standing water on about 2.9 million hectares of land.

This paddy crop, taken up by Punjab farmers in the early 1980s, is alien to the agro-climatic conditions of Punjab. Its superior cultivar, basmati, grown in the sub-mountainous areas of the state as well as the Bari Doab tract is a native crop.

Paddy cultivation gave better economic returns to farmers, and improved the health of the soil to some extent. But it is plagued by the twin problems of excessive use of water for irrigation in the peak summer months, leading to the lowering of the groundwater table, as also the problem of burning its straw after harvesting, resulting in colossal air pollution during the winter months.

About 20 million tons of paddy straw is produced in Punjab, of which about 15 million tons is managed by way of field burning by the farmers. This is because the window for the sowing of next wheat crop is too small to allow for the lengthy environment-friendly method of incorporating straw into the soil. Only about one million tons of straw is used in seven biomass-based power plants, and about three million tons, mainly basmati straw, is used as animal fodder.

Environmental scientists have proved that for every acre of land where paddy straw is burnt, about three tons of carbon dioxide, 120 kilograms of carbon monoxide, six kilograms of particulate matter, four kilograms of sulphur dioxide, and 400 kilograms of ash are released. This means in early winter, Punjab itself comes under the grip of the greenhouse effect.

It is also a fact that the burning of paddy straw also results in burning of precious organic material in the paddy field. For every acre of land, there is a loss of 5.5 kg of nitrogen, 2.3 kg phosphates, 25 kg potassium, about two tons of manure. In addition, useful microbes are also burnt.

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