Waterlogging is best described as:

Waterlogging is best described as:

• A. A form of soil degradation that occurs when soil is compacted by heavy machinery.
• B. A form of soil degradation that occurs when soil remains under water for prolonged periods, raising groundwater levels and inhibiting root oxygen uptake.
• C. Erosion caused by wind.
• D. Nutrient leaching due to heavy rainfall.

Answer: (B)

Waterlogging happens when soil stays saturated with water for extended periods, filling the air spaces and leaving roots without enough oxygen to breathe. Plant roots rely on oxygen for respiration to supply energy for growth and nutrient uptake, and when oxygen is scarce, root function declines and plants become stressed or die. As saturation continues, the groundwater table can rise into the root zone, making drainage even worse and keeping conditions anaerobic. This combination—prolonged saturation and inhibited root oxygen uptake—is what defines waterlogging. The other options describe different soil problems: soil compaction reduces porosity and drainage, wind erosion removes soil, and nutrient leaching happens when soluble nutrients are washed away by heavy rainfall, none of which capture the oxygen-starved, permanently wet root zone characteristic of waterlogging.

Waterlogging happens when soil stays saturated with water for extended periods, filling the air spaces and leaving roots without enough oxygen to breathe. Plant roots rely on oxygen for respiration to supply energy for growth and nutrient uptake, and when oxygen is scarce, root function declines and plants become stressed or die. As saturation continues, the groundwater table can rise into the root zone, making drainage even worse and keeping conditions anaerobic. This combination—prolonged saturation and inhibited root oxygen uptake—is what defines waterlogging. The other options describe different soil problems: soil compaction reduces porosity and drainage, wind erosion removes soil, and nutrient leaching happens when soluble nutrients are washed away by heavy rainfall, none of which capture the oxygen-starved, permanently wet root zone characteristic of waterlogging.