Which of the following is NOT covered in the ANSI A300 standards?

The ANSI A300 standards provide specific guidelines regarding the managing, maintaining, and caring for trees and related plants. Each part of the A300 addresses different aspects, including pruning, tree support systems, and other management practices.

Among the options presented, tree nutrition is not specifically covered under the ANSI A300 standards. While tree nutrition is a crucial aspect of overall tree health and management, it does not fall under the umbrella of the A300 specifications, which focus more on physical treatments and established practices, such as how to prune trees correctly, install support systems, and handle soil management.

Pruning and soil management, along with lightning protection, are directly addressed within the A300 documents since they pertain to specific actions and methods used in the arboricultural process, unlike tree nutrition, which is broader and more related to ongoing care and supplementation practices outside of the immediate requirements defined in the standards.