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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
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Jhum cultivation refers to
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Correct option: C
Tribal methods of shifting cultivation
Option C (Tribal methods of shifting cultivation) is correct because Jhum cultivation is a traditional agricultural practice used by some tribal communities involving clearing and cultivating land, then moving to a new area.
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(i) Lost of urea and phosphate fertilizer were used in the crops in the vicinity
(ii) The area was sprayed with DDT by an aircraft
(iii) The lake water turned green and stinky
(iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis. Which of the following is not used for disinfection of drinking water? World most problematic aquatic weed is