Live Crown Removal Limit (Pruning Dose)
The ANSI A300 Part 1 live-crown removal check: removal_pct = removed / live x 100 against the maturity-class cap (mature <= 25% in a season, young ~15%, over-mature ~10%, stressed 0%). The 25% is the mature-tree MAXIMUM, not a target -- a young or stressed tree gets far less. Lion's-tailing violates A300 even under the percent cap.
Formula and source
removal_pct = removed_foliage / live_foliage x 100; cap_pct = mature 25 / young 15 / over-mature 10 / stressed 0; within when removal_pct <= cap_pct.
The ANSI A300 Part 1 live-crown removal limit (ISA Best Management Practices - Pruning), by name.
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