Soil fertility can be conserved and renewed by

This question is testing your knowledge of how soil fertility can be conserved and renewed. Soil fertility refers to how well the soil can support plant growth. The question is asking which of the following options can help maintain or improve soil fertility.

Option A suggests yearly monocropping; this means planting the same crop in the same soil every year. This is not a good way to conserve soil fertility because it can deplete the soil of nutrients and increase the risk of pests and diseases.

Option B suggests crop rotation and cover crops, which is the correct answer. Crop rotation means alternating crops grown in a specific field over time to help maintain soil fertility. Cover crops are planted to protect the soil from erosion, improve soil structure, and add nutrients to the soil.

Option C suggests bush burning to remove unwanted debris. This is not a good way to conserve soil fertility because it can destroy beneficial microorganisms and organic matter in the soil.

Option D suggests avoiding artificial manures. This is not a good way to conserve soil fertility because artificial manures can provide essential nutrients to the soil that help maintain soil fertility.

In summary, the correct answer to the question is Option B, which involves crop rotation and cover crops. This helps to maintain soil fertility by alternating crops grown in the same field and adding nutrients to the soil.