Question
How did surveys become important under the colonial administration?
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(i)
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Land use
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(a)
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prevent soil erosion
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(ii)
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Humus
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(b)
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narrow zone of contact between the lithosphere,
hydrosphere and atmosphere |
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(iii)
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Rock dams
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(c)
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productive use of land
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(iv)
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Biosphere
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(d)
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organic matter deposited on top soil
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(e)
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contour ploughing
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