Why is soil grade change harmful?

Why is soil grade change harmful?

• A. It changes color only
• B. It affects oxygen and moisture around roots
• C. It improves air moisture
• D. It reduces root length

Answer: (B)

Changing soil grade around plant roots disrupts the root-zone environment by altering porosity, drainage, and how moisture is kept or shed. Roots need adequate oxygen for respiration, and when you raise or compact soil around them, air spaces are reduced and water can accumulate, causing oxygen deprivation or waterlogging. That stress impairs nutrient uptake and root health, making the plant weaker. The other options miss this key effect: color change isn’t a root issue, “improving air moisture” isn’t accurate, and while grading can eventually affect root growth, the central harm is the imbalance of oxygen and moisture in the root zone.

Changing soil grade around plant roots disrupts the root-zone environment by altering porosity, drainage, and how moisture is kept or shed. Roots need adequate oxygen for respiration, and when you raise or compact soil around them, air spaces are reduced and water can accumulate, causing oxygen deprivation or waterlogging. That stress impairs nutrient uptake and root health, making the plant weaker. The other options miss this key effect: color change isn’t a root issue, “improving air moisture” isn’t accurate, and while grading can eventually affect root growth, the central harm is the imbalance of oxygen and moisture in the root zone.