What is a potential consequence of not having a nutrient management plan?

A nutrient management plan is crucial for ensuring that agricultural practices are in compliance with state regulations designed to protect water quality and promote sustainable agriculture. Without such a plan, farmers risk violations of these regulations, which can lead to potential legal actions. This could include fines or other consequences from regulatory agencies for failing to manage nutrients properly, thereby impacting the environment.

In contrast, the other options reflect outcomes that are generally positive or neutral regarding farming practices, but they do not address the regulatory and compliance aspects that can arise from neglecting a nutrient management plan. Increased soil fertility, higher crop yields, and lower production costs are not guaranteed outcomes in the absence of a nutrient management plan; in fact, improper nutrient usage could lead to reduced productivity and negative environmental impacts. Thus, the main concern here is compliance with state regulations to avoid legal repercussions, making it clear why the identified consequence is significant.