What is one potential consequence of poor soil drainage in agriculture?

Poor soil drainage can lead to waterlogged conditions, which creates an environment conducive to root rot and other issues that stress plants. When soil does not drain properly, it retains excess moisture, reducing the amount of oxygen available to plant roots. Roots require oxygen for respiration; prolonged saturation can cause them to become unhealthy or die, resulting in root rot. This, in turn, affects the plant’s overall health and growth, leading to stunted growth, decreased nutrient uptake, and ultimately lower yields.

Improved crop yields would not result from poor drainage; instead, they are typically associated with well-drained soils that support healthy root systems. High nitrogen levels may occur in poorly drained soils due to anaerobic processes, but this alone doesn't directly address the stress imposed on the plants. Likewise, decreased soil erosion is generally a positive outcome related to certain soil management practices, rather than a consequence of poor drainage.