Which of the following is NOT a recommended precaution for non-selective herbicide applications?

The correct answer, indicating that applying near desirable vegetation is not a recommended precaution for non-selective herbicide applications, is based on the nature and purpose of non-selective herbicides. Non-selective herbicides are designed to kill or injure any plant they come into contact with, which means applying them near desirable vegetation poses a significant risk of unintentional damage.

When using non-selective herbicides, maintaining a safe distance from desirable plants is crucial to prevent collateral damage. This precaution ensures that the herbicide affects only the target weeds or pests without harming nearby desirable plants, which would defeat the purpose of careful management of the area.

On the other hand, the other precautions mentioned—avoiding application on frozen ground, using low pressure, and exercising extreme caution on slopes—are all relevant practices that help minimize the risk of herbicide run-off or unintended consequences. These practices contribute to environmental safety and effective herbicide application while protecting nearby ecosystems or landscaped areas.