In which soil conservation method, several grasses are left out in soil after the crop is harvested?

Contour farming

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Terrace farming

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Tillage

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Crop rotation

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Solution

The correct option is B Tillage
Tillage is a method of soil conservation. In this process the underground parts of plants like maize, potato and several grasses are left out after the crop is harvested. These parts remain underground. This way, the fertility of soil improves and its binding is maintained. Conservation method of tillage prevents erosion.

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