Question

which of the following is correct?
Contour ploughing



is not a very effective way of checking soil erosion

is generally effective in slightly hilly areas with gentle slopes

helps in forming channels for water to flow down slopes

is growing strips of grass between ploughed areas.

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Answer 1

helps in forming channels for water to flow down slopes is the correct answer.

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Answer 2

Answer:

is growing strips of grass between ploughed areas.