Which of the following factors could potentially lead to a reduced seeding rate?

The correct choice indicates that adverse weather can lead to a reduced seeding rate. While adverse weather, such as excessive rain, drought, or extreme temperatures, can negatively affect planting conditions and ultimately the decision on seeding rates, it is more common to adjust seeding rates on the side of caution. For instance, if conditions are poor, farmers might choose to plant fewer seeds to reduce the risk of poor emergence or establishment of plants due to the stress of adverse conditions. This helps in managing resources effectively and can optimize overall crop yields despite difficult circumstances.

In contrast, optimal weather conditions and favorable soil conditions typically encourage farmers to increase or maintain higher seeding rates to take full advantage of the beneficial growing environment. Higher seed prices may influence the decision, but that doesn't directly lead to a reduced seeding rate in the absence of other stressful conditions.