What does a higher soil half-life indicate about a pesticide?

A higher soil half-life indicates that a pesticide remains in the soil for a longer period before it is broken down or degraded. This persistence can be due to various factors, including the chemical structure of the pesticide, soil conditions, and microbial activity.

When a pesticide has a longer half-life, it means that it can continue to be effective over a more extended period, which can be advantageous for ongoing pest control. However, this also raises concerns regarding potential environmental impacts, as the pesticide could affect non-target organisms and contribute to soil contamination.

The other options do not directly relate to soil half-life. For instance, while a higher soil half-life does not inherently indicate lower toxicity, efficacy, or solubility, it specifically points to how long the pesticide persists in the environment before breaking down.