Which one among the following is the main form of degradation in irrigated areas ?

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Q: 15 (SCRA/2014)

Which one among the following is the main form of degradation in irrigated areas ?

question_subject: 

Geography

question_exam: 

SCRA

stats: 

0,66,63,48,8,66,7

keywords: 

{'gully erosion': [0, 0, 1, 1], 'degradation': [3, 1, 1, 3], 'soils': [3, 0, 1, 1], 'wind erosion': [1, 0, 0, 3], 'salinisation': [0, 0, 0, 1], 'siltation': [0, 1, 0, 1], 'areas': [0, 0, 1, 0], 'land': [0, 0, 0, 1], 'main form': [0, 0, 0, 1]}