'Improved Planting Standard' changes rules for trees

This diagram from the University of Arizona publication “Selecting, Planting and Staking Trees.” shows planting hole, unamended backfill, mulch on soil surface, and staking. (Courtesy)

This diagram from the University of Arizona publication “Selecting, Planting and Staking Trees.” shows planting hole, unamended backfill, mulch on soil surface, and staking. (Courtesy)

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