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Which rivers are important for agriculture and irrigation in Western Asia?
  • a)
    Nile and Amazon rivers
  • b)
    Tigris and Euphrates rivers
  • c)
    Mississippi and Danube rivers
  • d)
    Rhine and Yangtze rivers
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Which rivers are important for agriculture and irrigation in Western A...
Several important rivers flow through Western Asia, including the Tigris and Euphrates rivers in Iraq. These rivers have been essential for agriculture and irrigation in the region for thousands of years.
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Passage -1The law in many parts of the world increasingly restricts the discharge of agricultural slurry into watercourses. The simplest and often the most economically sound practice returns the material to the land as semisolid manure or as sprayed slurry. This dilutes its concentration in the environment to what might have occurred III a more primitive and sustainable type of agriculture and converts pollutant into fertilizer. Soil microorganisms decompose the organic components of sewage and slurry and most of the mineral nutrients become available to be absorbed again by the vegetation.The excess input of nutrients, both nitrogen and phosphorus - based, from agricultural runoff (and human sewag e) has caused many healthy oligotrophic lakes (low nutrient concentrations, low plant productivity with abundant water weeds, and clear water) to change to eutrophic condition where high nutrient inputs lead to high phytoplankton productivity (sometimes dominated by bloomforming toxic species). This makes the water turbid, eliminates large plants and, in the worst situations, leads to anoxia and fish kills; so called cultural eutrophication. Thus, important ecosystem services are lost, including the provisioning service of wild-caught fish and the cultural services associated with recreation.The process of cultural eutrophication of lakes has been understood for some time. But only recently did scientists notice huge dead zones in the oceans near river outlets, particularly those draining large catchment areas such as the Mississippi in North America and the Yangtze in China. The nutrient-enriched water flows through streams, rivers and lakes, and eventually to the estuary and ocean where the ecological impact may be huge, killing virtually all invertebrates and fish in areas up to 70,000 km2 in extent. More than 150 sea areas worldwide are now regularly starved of oxygen as a result of decomposition of algal blooms, fuelled particularly by nitrogen from agricultural runoff of fertilizers and sewage from large cities. Oceanic dead zones are typically associated withindustrialized nations and usually lie off- countries that subsidize their agriculture, encouraging farmers to increase productivity and use more fertilizer.Q.What is the central theme of this passage?

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Which rivers are important for agriculture and irrigation in Western Asia?a)Nile and Amazon riversb)Tigris and Euphrates riversc)Mississippi and Danube riversd)Rhine and Yangtze riversCorrect answer is option 'B'. Can you explain this answer?
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Which rivers are important for agriculture and irrigation in Western Asia?a)Nile and Amazon riversb)Tigris and Euphrates riversc)Mississippi and Danube riversd)Rhine and Yangtze riversCorrect answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which rivers are important for agriculture and irrigation in Western Asia?a)Nile and Amazon riversb)Tigris and Euphrates riversc)Mississippi and Danube riversd)Rhine and Yangtze riversCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which rivers are important for agriculture and irrigation in Western Asia?a)Nile and Amazon riversb)Tigris and Euphrates riversc)Mississippi and Danube riversd)Rhine and Yangtze riversCorrect answer is option 'B'. Can you explain this answer?.
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