What are factors affect growth of trees?

Air pollution. Bacterial diseases such as leaf spot. Competition with shallower-rooted plants such as grasses. Fungal diseases such as phytophthora root rot. Lawn equipment injury. Pesticide drift. Planting depth [too deep or too shallow]. Planting width [too narrow]. Poor drainage. Poor moisture infiltration and percolation. Pruning improperly done. Root-knot nematodes. Roots growing back and strangling off growth, because of underground barriers. Soil compaction. Soil moisture level. Stressors such as bark beetles and borers. Yo-yo supplemental watering.